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Flying Scotsman
01-17-2008, 12:17 PM
I have decided over the winter months to build this hull. Initially I was looking at another cat hull and then realised I did not have a rough water, high wind hull. After some research I settled on this hull for sport/offshore.

It will have Speedmaster hardware, OEMRC or CC120 esc, .150 Hughey, Y537/3, 5 or 6 cell LI-PO 5000 25C, 11XL, to start with. Any other suggestions or comments?

Douggie

SJFE
01-17-2008, 12:25 PM
Way to go there Douggie sweet hull. Are you considering a KB? For a foul weather hull the extra weight would help out. What exactly are the specs on that hull? Also what's the layup like?
Tom

Flying Scotsman
01-17-2008, 12:36 PM
Way to go there Douggie sweet hull. Are you considering a KB? For a foul weather hull the extra weight would help out. What exactly are the specs on that hull? Also what's the layup like?
Tom

Tom, I thought about a KB45 and I have a spare 14L, but I want to try this combo first. The hull is in transit and I will advise layup upon receit.

The Lizard Xrteme is a very deep V hull...32.3"L X 9.5"W

SJFE
01-17-2008, 01:21 PM
Only 32 hu. I will be watching this one with quite some interest :)

Eyekandyboats
01-17-2008, 05:03 PM
great looking hull, nice choice.
i would run a lehner 2250 in that on 6s just for the hell of it.
mind you it could run as E2 or P mono as well depending on the hull shape
Personal choice would be a 2240 or a Neu 1521 on 4s2p with a hydra 240. prop on the Neu would be 47 on up

steveo
01-17-2008, 05:11 PM
i saw this hull race in s-mono (video) it seemed like to much power to me until i saw the race, it was smokin

Flying Scotsman
01-17-2008, 05:20 PM
great looking hull, nice choice.
i would run a lehner 2250 in that on 6s just for the hell of it.
mind you it could run as E2 or P mono as well depending on the hull shape
Personal choice would be a 2240 or a Neu 1521 on 4s2p with a hydra 240. prop on the Neu would be 47 on up

I could not agree more with your motor choices but $$$$. I was wishing for a Neu 1521 1.5d for Xmas but no luck!!!

Eyekandyboats
01-17-2008, 05:22 PM
I could not agree more with your motor choices but $$$$. I was wishing for a Neu 1521 1.5d for Xmas but no luck!!!
Ok then you KB45 choice would work out just great
i had a buddy who ran the 1700 K version in a titan 40 ( heavy ass hull!) and it boote'd close to the Neu power'd boats.
i think he ran a 51 MM or maybe larger, I will ask him for you

I know they are amp hogs though so be sure to get a nice controller

Flying Scotsman
01-17-2008, 05:35 PM
The interesting thing, I believe this a very light hull and that led me to my first power option.

Thanks,

Douggie

Eyekandyboats
01-17-2008, 05:50 PM
yes light is good but sheer volume of the hull is a factor as well
because there is a lot of surface area on that hull that might be a contributing factor.

Flying Scotsman
01-17-2008, 05:52 PM
yes light is good but sheer volume of the hull is a factor as well
because there is a lot of surface area on that hull that might be a contributing factor.

Duly noted and a great point

SJFE
01-17-2008, 06:57 PM
Douggie is that the Extream or the first version? Hey look what I found..@ 65 bucks it's a little spendy. I'd blow the cash on it just to have everything nice and neet :).

http://i42.photobucket.com/albums/e343/STOAK/m-1717_3.jpg

Flying Scotsman
01-17-2008, 07:49 PM
Tom, it is the Xtreme and I did note this motor mount. I went with Steven's new adjustable mount .

Flying Scotsman
01-18-2008, 05:35 PM
I received the hull today and it is top notch. The only complaint would be it is a hull that requires either a lot of polishing or painting to look great. A lot of swirl and no shine. This also came in an orange finish not white as I was led to believe when I phoned MHZ/USA prior to ordering. Oh well, a painting I will go and yes SJFE the wifey will be upset!

Douggie

Eyekandyboats
01-18-2008, 06:09 PM
pictures? :)
as for the hull quality how was it shipped, Dr Loo is a sucker for that stuff he ships it cheap ass!

Flying Scotsman
01-18-2008, 06:51 PM
pictures? :)
as for the hull quality how was it shipped, Dr Loo is a sucker for that stuff he ships it cheap ass!

I do not understand your questions?

Steakhouse
01-18-2008, 07:14 PM
:) I think what he means is in reference to how it was packaged, did he use inexpensive packaging that resulted in stress to the hull finish. I think:huh:

Eyekandyboats
01-18-2008, 07:14 PM
sorry just forget about it LOL i'm messed up

Flying Scotsman
01-18-2008, 07:22 PM
sorry just forget about it LOL i'm messed up

Do not worry we all, at times, say things we wish we could take back! :)

Take care

Douggie

Steakhouse
01-18-2008, 07:32 PM
Im gonna try the 2250 i have in the Lizard on 8s and see what happens.:wink:

Steakhouse
01-18-2008, 07:45 PM
Of course thats if I dont grenade it like the last one I built:stupid: :blink:

Flying Scotsman
01-18-2008, 07:58 PM
Of course thats if I dont grenade it like the last one I built:stupid: :blink:

Well Sir, please advise us to what hulls you have built and the power you have used in each hull:w00t:

Steakhouse
01-18-2008, 08:37 PM
[QUOTE=Flying Scotsman;25517]Well Sir, please advise us to what hulls you have built and the power you have used in each hull:w00t:[/QUOTE
My first boat is the mhz shockwave 25 w/ speed 600. Retired.

I built a my Dragonlady with a big plett brushed motor and 24 ib4200 cells.

The boat blew in half. Its on rum, search "explosion". Turner said the cells outgassed

Hydrogen and ignited by the communtater arc.

I also have a Nomad XL on twin 8xl KB 45's. Thats a fun boat. Runs maybe 35 on 4s.

Titan29, fiego 9xl

Challenger 43 not built yet. Probably never at the rate im going:glare: What do you run scots?

Doug Smock
01-18-2008, 10:01 PM
Nice hull Douggie,
Are you going to race it?

Doug

Flying Scotsman
01-19-2008, 11:20 AM
Nice hull Douggie,
Are you going to race it?

Doug

Not at first Doug, I am adopting a wait and see attitude in reference to all present and proposed rule changes :olleyes:

Flying Scotsman
01-19-2008, 11:30 AM
[QUOTE=Flying Scotsman;25517]Well Sir, please advise us to what hulls you have built and the power you have used in each hull:w00t:[/QUOTE
My first boat is the mhz shockwave 25 w/ speed 600. Retired.



Challenger 43 not built yet. Probably never at the rate im going:glare: What do you run scots?

I run a Toysport Triton, Delta 29.5", Prather lapcat, M1 Supercat, H&M microcat, H&M no step 1, SV 27 currently anh have 2 other boats that require repair.
Douggie

Flying Scotsman
02-11-2008, 02:17 PM
Painted Lizard Extreme. Tamiya paint, no clearcoat

Douggie

Flying Scotsman
02-21-2008, 06:36 PM
The hard bits have been done. All the transom hardware is installled as previously discussed. The dillema, as I see it, is. I have 2 motors available an 11XL Feaigo, a KB 45 14L . My thought was 11XL with power and props as previously descrbed or should I look some where else. Note this a SPORT / OFFSHORE boat

Douggie

SJFE
02-21-2008, 07:13 PM
Douggie it looks REALLY nice. Your finish work is excellent. May I trouble you for the part numbers of those two colors my good man? :smile:

Flying Scotsman
02-22-2008, 06:42 PM
Tom, as your obidient servant LOL you have a PM

SJFE
02-22-2008, 09:26 PM
Got it...Getting it...Thanking you for it :wink:

goldendesign04
02-22-2008, 10:37 PM
douggie,
as I usually see from one such as your self, clean an profesional.
I like it a lot, good work.
-Wayne

Flying Scotsman
03-12-2008, 02:33 PM
Thanks Wayne.
Finished Hull
Speedmaster hardware, 11XL Feaigo, Sentilon HV 100 esc, 1 5000 TP 3S and 1 5000 TP 2S in series, Y537/3 prop, Hitec HS 645MG servo.

Steakhouse
03-13-2008, 10:29 AM
Thanks Wayne.
Finished Hull
Speedmaster hardware, 11XL Feaigo, Sentilon HV 100 esc, 1 5000 TP 3S and 1 5000 TP 2S in series, Y537 prop, Hitec HS 645MG servo.

Very clean setup. Nice!

bababoboRc
03-14-2008, 06:32 PM
Hi There Flying Scotsman i love your boat
i'm setting up the same hull :banana: and similar setup, and speed controller
but i have this motor Turnigy BL 36-56-2700 running on 6S Lithium, is this powerplant too small for this size hull ?
and what size rudder and surface drive are you running

Regards
Adrian

Flying Scotsman
03-14-2008, 07:24 PM
I am not familliar with that motor and It looks like a small can. I presume 2700kv. If that is the case WAY TOO HOT with 6S . What prop ?
The hardware is Speedmaster as previously noted. Please note I am borderline on my setup

Product ID: ros-monosys
Speedmaster Mono Hardware System

Douggie

SJFE
03-14-2008, 07:50 PM
I have to agree with Douggie. That motor is way to small and the kv rating is off the chart for your hull & voltage. Sorry.

bababoboRc
03-15-2008, 02:48 PM
Thanks for the feedback guys
what motor would you recommend forthis hull, i want to use it as a sport boat but still want to get decent speed out of it
Douggie
i'm not surw what you mean by your setup is on borderline?
excuse my ignorance :sorry: i'm new at this elecric stuff

Cheers
Adrian

is this the stinger ? .187 (3/16-inch Cable) for .21 - .40 motors
http://www.rossisales.com/strut.html

rudder ?.40 Rudder Assemblies
http://www.rossisales.com/ruddernew2.html

Flying Scotsman
03-17-2008, 01:34 PM
Hi Adrian, when I say borderline the esc is rated for 100 amps and the 11XL motor is rated at 1500 rpm per Kv. I am using 5S LI-PO therefore nominal RPM= 27,000. The hull is 32.5" L and total weight is 5.3lbs. I am using a small diameter prop Y537/3 to limit the amperage draw...I hope!!!
This hull size and weight is more suited to a large can high torque motor...KB45 XL, Neu power or transmission with Feaigo power. This what I had sitting arround and I hope it does not go POOF.
I hope this helps.

Douggie

bababoboRc
03-17-2008, 06:29 PM
Hi There
Thanks Douggie for your feedback i got my hull today looks good in white
i also took your advice and brought two motors
this one http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4937
and this
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4936
will give these a run ,cheap motors really:w00t: $ 53 each

Regards Adrian

Flying Scotsman
03-17-2008, 07:36 PM
[QUOTE=bababoboRc;31890]Hi There
Thanks Douggie for your feedback i got my hull today looks good in white
i also took your advice and brought two motors
this one http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4937
and this
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4936
will give these a run ,cheap motors really:w00t: $ 53 each


Adrian, motors can be cheap, quality esc and motors NO!!! If you look at the power to bucs equation

bababoboRc
03-17-2008, 08:38 PM
Hi there Douggie
Sorry to be a pain but i cannot find the rudder you are using on the speedmaster site is it a 21 mono rudder or the 40 rudder cheers
Adrian

Flying Scotsman
03-17-2008, 09:46 PM
Hi there Douggie
Sorry to be a pain but i cannot find the rudder you are using on the speedmaster site is it a 21 mono rudder or the 40 rudder cheers
Adrian

No pain....21 but you may wish to lower the rudder as far as possible.
When you get the hang of it, there are many guys that can help you, with more experience than myself.

Enjoy your build.

Douggie

bababoboRc
03-17-2008, 10:34 PM
Thanks for the help Douggie
i will put some pics as soon as i make a start on this build
Regards
Adrian

bababoboRc
04-05-2008, 04:50 PM
Hi Douggie have you run your boat yet ??

Flying Scotsman
04-07-2008, 12:34 PM
No, as the weather has been crappy. I also plan to install a 13XL which I should receive in a matter of days from OSE, as i wish to keep the amps down. I will be using an Eagle Tree Micro Logger to verify performance with different props and voltage.

Douggie

bababoboRc
04-08-2008, 04:15 AM
Hi douggie sounds interesting is this the unit you are going to use http://www3.towerhobbies.com/cgi-bin/wti0001p?&P=SM&I=LXTNL0#tech

Regards Adrian

andym
04-08-2008, 07:28 AM
Hey Dougie I was running a 9xl on 5s in the triton with a m447 prop. High 50's a 10 xl on 5s would be cool in that boat maybe, how is the missus going anyway mate not going baa baa baa at you to much I hope. For those that do not know yet Dougie just married Dolly in Edinburgh Scotland and I am sure we all wish them well !!

Flying Scotsman
04-08-2008, 11:15 AM
Hey Dougie I was running a 9xl on 5s in the triton with a m447 prop. High 50's a 10 xl on 5s would be cool in that boat maybe, how is the missus going anyway mate not going baa baa baa at you to much I hope. For those that do not know yet Dougie just married Dolly in Edinburgh Scotland and I am sure we all wish them well !!

Thanks for the info Andy. I will be testing an 11XL on 5S and a 13XL on 5 and 6S.

Also the wedding went well and was held on a sunny day out at the farm. Mel was the best man but he got sloshed on champagne and said some rude remarks to the rabbi. The wedding gifts were superb ...new Gates wellies... new gloves from Australia and last but not least an invitation to join Andy at his resort.
We will be spending our honeymoon in New Zealand. I just hope that Dolly will remain true and not have a wandering eye for one of the local rams.

Please note that the above comments are for people who also belong to RRR, as for OSE members, this will not make sense

Douggie

DJcz
12-25-2008, 09:07 PM
You can here please superadd pictures LIZARD EXTREM from inwards? Excuse mine bad English translates it TRANSLATOR 2007 Thanks DJ.

zypher9
12-30-2008, 12:07 AM
Im gonna try the 2250 i have in the Lizard on 8s and see what happens.:wink:
I'm running 2250 on 4s in Lizard as well and 150 rated esc (25V). How much this 2250 can take up?

bababoboRc
01-16-2009, 03:10 PM
Hi There it's been a while finally finished this boat here a few pics and a vid hope you like it :beerchug:

And here is the vid :doh: close call and really lucky not to total the new boat

http://www.youtube.com/watch?v=O73X0EIKKnE&feature=channel_page

bababoboRc
01-16-2009, 03:20 PM
a couple more pics
The prop & rudder blade after the crash i also stuffed a6 kg metal gear servo ,did 87.6 kmh on that run with abc H5 prop

Flying Scotsman
01-16-2009, 03:24 PM
It looks great. What motor is that, it looks like a KB45?
No problems with the carbon fibre as far as reception goes?

Douggie

bababoboRc
01-16-2009, 03:33 PM
Hi
Yes it is KB 45 XL 8 1700 Kv seams to run strong ran an octura M445 yesterday was faster 91 k and revved better too but burned the ESC not really sure wy
Just brought a Etti Brushless Navy Race 150 from steve so hope this one holds out ok

Flying Scotsman
01-16-2009, 03:38 PM
The KB motors are real amp hogs, you may wish to look at the new Feaigo big boy.

Douggie

bababoboRc
01-16-2009, 03:43 PM
is this the one steven has on his website?
How are your boats going ?

Flying Scotsman
01-16-2009, 03:53 PM
Yes, that is the motor. The ponds are too bloody cold. But I did purchase A UL 1 from Steven to keep my spirits up and Yes Andy AND PADDY. that may include some single malt.
PS all Aussies my brother left yesterday for a 6 WEEK HOLIDAY in the land of barren spaces. Paddy you are OK as Tassy is beautiful

Douggie

bababoboRc
01-17-2009, 02:40 PM
Sorry douggie no problems at all with the radio gear i usually tape the aerial to the lid of the boat but a few times i forgot to do still no prob:cool: the fasst radio are a good radio anyways
I have been running this radio in my gas boats and run the aerial taped on the side of the radio box

DJcz
02-04-2009, 03:20 AM
Hallo you can me please say what is centre of gravity LIZARDU EXTREM on undisturbed surface and what is centre of gravity at big waves? In own line me distance in cm from mirror. Thanks and excuse pertinent mistakes in translation reloaded me it PC translator 2007.

Gerwin Brommer
02-04-2009, 11:24 AM
Douggie,

Are you sure about running a 37mm prop on a Lizard ????

Flying Scotsman
02-04-2009, 11:51 AM
Hi Gerwin

The Y537/3 was my initial setup prop. I have run Prather 220 and X640 with good results.

I am a bit of a fan of small diameter props with large pitch

Douggie

Gerwin Brommer
02-04-2009, 02:02 PM
Small props with large pitch are for SAWhydro's :thumbsdown:

For a real breathtaking Lizard : lehner 2250/8 on 6S2P on a X447 Andy Brown.

Flying Scotsman
02-04-2009, 02:28 PM
No kidding....do you have a spare Lehner 2250/8. I could use...at no cost :smile:
On cats the small prop also works well
EDIT
Gerwin, please look at my setup..cheap motor..cheap ESC. and sport useage
Folks, if you do not know, Gerwin is a very experienced FE boat builder and you can take what he states to the bank

Douggie

bababoboRc
02-04-2009, 02:30 PM
Hi There my one did 91k on gps with M445

Gerwin Brommer
02-04-2009, 03:15 PM
Bababo :

Nice !
Clean boat, very nice setup !
With the Etti it will work fine.
6S is the limit for the KB8XL.
Don't run it on 6s2P.
It will demagnetize the motor.

bababoboRc
02-04-2009, 03:57 PM
Thanks the etti esc worked fine till i blew the capacitors in it it was the funniest thing i have ever seen doing a full speed pass the explosion blew the lid off my boat that was taped down six feet in the air i managed to bring the boat in but lost my lid in the pond :ThumbsDown01: gutted

just sent the esc back today for warranty not really sure what happened i was only running an X442 prop

im running Zippy R 21 to 35c 4500mah
what do you mean by 6s2P

Flying Scotsman
02-04-2009, 04:21 PM
Adrian, he is referring to the available amperage ..6S1P 4000mah 20C = 80 amps...6S2P 4000mah 20C = 160 amps.
I do not know why this would demagnetize the motor if the prop etc. remains the same over a IP setup. Gerwin?

Douggie

Gerwin Brommer
02-04-2009, 04:22 PM
6S2P means double sixpack.

Strange, what happened to your Etti.
At full speed the load on the motor/batt/esc should be minimal.

Gerwin Brommer
02-04-2009, 04:54 PM
Douggie.

The KB8XL on 6S is fine.
But this motor turns hot easily.
Running the motor for a "very" long period, while it's hot, will
destroy it.

In Germany are a few guys who modified the motor, added coolingholes
in the frontend of the motor. And some of the KB's have spacers/shims inside,
they can cause friction on the bearings, which means extra heat. So they removed a shim/installed a smaller spacer.

Flying Scotsman
02-04-2009, 05:01 PM
Thanks Gerwin and as he mentions the KB series of motors are not the best built motors without modifications to tame their heat and amperage draw

Douggie

bababoboRc
02-04-2009, 06:09 PM
Ok i was going to mill some holes in my kb motor too but could not see any point in doing so because the boat is totally sealed
and the kb 45 is really something i wanted to trash the hell out of it to see what it could do i'm not even running thrust bearings on it just looking at some neu motors at the moment but still have another Kb to trash first

bababoboRc
02-04-2009, 07:18 PM
Hi guys i have tried several times to contact mhz usa & germany and had no reply
i'm trying to get a new lid for my lizard xtreme are they having an extended holiday or what ??:sad:

Flying Scotsman
02-04-2009, 07:31 PM
Adrian, belive me they are slow to answer...the old fashioned telephone works best

On another point. What are the members thoughts on small diameter to large pitch. IMO...keep the motor running at its perceived optimum rpm to load?? High voltage...low KV large can motors. Keep the prop spinning with the least amperage requirement Or do I have it wrong?

Douggie

cacofonix
05-18-2009, 12:44 PM
hi folks

i'm mounting a Lizard , congratulation for your clean mounting.
just wondering about CG.

on pictures i can see that motor is 15 cm from the back , right ??

my setup :
Feigao 12XL (thanck steven)
6S1P 5000 25C
Turnigy 180A
prop ........... i'm not sure 45 or 48 or ......more ??

thanks for your help

H

Jesse J
05-18-2009, 12:49 PM
hi folks
i'm mounting a Lizard ...
H

Did I read this right?

cacofonix
05-18-2009, 01:03 PM
sorry , what did you expect to read ???

i'm assembling ... ???

Jesse J
05-18-2009, 01:20 PM
sorry,:just-kidding: bad attempt at potty mouth humor, never mind me.:hide:

cacofonix
05-18-2009, 01:27 PM
:beerchug:

EPower
05-18-2009, 04:11 PM
hi folks

i'm mounting a Lizard , congratulation for your clean mounting.
just wondering about CG.

on pictures i can see that motor is 15 cm from the back , right ??

my setup :
Feigao 12XL (thanck steven)
6S1P 5000 25C
Turnigy 180A
prop ........... i'm not sure 45 or 48 or ......more ??

thanks for your help

H

My Lizard Xtreme is on this Thread Kb45 8XL 6S, just scroll down the page a bit:beerchug:

http://forums.offshoreelectrics.com/showthread.php?t=6924

cacofonix
05-18-2009, 04:44 PM
hi EP

thank's !!!
great job

i'm about fixing the stinger and my idea was to use a propeller between 45 / 48
but i never think using bigger !!!!

but motor are not same, i think my feigao have less power than your KB45.

i will read your theard carefuly

H

EPower
05-18-2009, 04:50 PM
hi EP

thank's !!!
great job

i'm about fixing the stinger and my idea was to use a propeller between 45 / 48
but i never think using bigger !!!!

but motor are not same, i think my feigao have less power than your KB45.

i will read your theard carefuly

H
Hi The biggest prp i run is ABC H5 (45 mm ) i would start small octura X442 and work my way up but i would think X445 would work :thumbup::beerchug:

cacofonix
05-18-2009, 04:56 PM
yep !
i also have eagle tree to help me in my choice !

thanks

H

saleens7
05-18-2009, 05:32 PM
just checked out the pics...thats a sick build....well put together too....

EPower
05-18-2009, 05:42 PM
just checked out the pics...thats a sick build....well put together too....

Thanks saleens7 it is my favorite boat :thumbup1:
:beerchug: Adrian

focused
05-18-2009, 06:53 PM
Here is another topic where a Lizard is built , yes mine . I`m sorry the text is in dutch but if you want to know something about the lizard just ask.

http://electricpowerboats.actie-forum.com/fotos-videos-en-bouwverslagen-f7/bouwverslag-mhz-lizard-xtreme-t27.htm

I ran it with a kb45l10 but that was to hot and draw to much amps so i exchanged it for a 540xl9 on 6s and 45mm lipo and runs so far so good , everything gets warm but within the limits , speed 55mph and above .


Michiel.

EPower
05-18-2009, 07:00 PM
Here is another topic where a Lizard is built , yes mine . I`m sorry the text is in dutch but if you want to know something about the lizard just ask.

http://electricpowerboats.actie-forum.com/fotos-videos-en-bouwverslagen-f7/bouwverslag-mhz-lizard-xtreme-t27.htm

I ran it with a kb45l10 but that was to hot and draw to much amps so i exchanged it for a 540xl9 on 6s and 45mm lipo and runs so far so good , everything gets warm but within the limits , speed 55mph and above .


Michiel.

Very nice any video of it running

focused
05-18-2009, 07:04 PM
Thanks ,

Yes i just have received a video today but its in slow-motion and have to upload it to youtube or simular website.

Michiel

cacofonix
05-19-2009, 03:14 AM
hi folks

very nice michiel !!
i really like central rudder, and i think i will do like this also

about set up, you are all using crasy motor !!!!
i was thinking that a 540 12XL will be the limit ........

any way i keep you aware of my project

H

focused
05-19-2009, 03:40 AM
hi folks

very nice michiel !!
i really like central rudder, and i think i will do like this also

about set up, you are all using crasy motor !!!!
i was thinking that a 540 12XL will be the limit ........

any way i keep you aware of my project

H


Hi ,

Thanks for the compliments and yes we like to go crazy :bounce: we even ran a Hopf cyclon with a xl8 and 47mm Andy Brown and 20nimh and reached the 60mph.

If i were you i start testing it with a 45mm carbon then go up to 50mm , the xl12 has power enough for rotating the 50mm K-prop but think you will end up with a 48mm K-prop or metall.

grz

Michiel.

cacofonix
05-19-2009, 03:48 AM
ok ok thanks for your help
in stock i have : K45 / X445 (original) / X445 (mod) / X447 (raw ....) / K48 / K51

i think the good one is in the list !!

H

focused
05-19-2009, 04:11 AM
just uploaded two vids to youtube .

vid 1 Lizard in action taken in slow-motion it was very very windy to much for FE.
http://www.youtube.com/watch?v=MDPRk-ZDhkg

vid 2 testing the lizard first run and a second for the h&m x-ray L we did not go full throttle yet .
http://www.youtube.com/watch?v=eygZ_2vOg_I

Michiel.

cacofonix
05-19-2009, 02:23 PM
great !!

one question about stinger position, on transom how many millimeters from the V bottom is the hole ??

H

EPower
05-19-2009, 04:08 PM
great !!

one question about stinger position, on transom how many millimeters from the V bottom is the hole ??

H

Just put it as low as you possibly can :thumbup1:

focused
05-19-2009, 04:58 PM
great !!

one question about stinger position, on transom how many millimeters from the V bottom is the hole ??

H

Are you going to use the MHZ Trimax or some other strut because it depents on the type strut/stinger etc.



Michiel.

cacofonix
05-19-2009, 05:02 PM
i use home made stinger , i have a lathe and milling machine .......
stinger length (from transom to DD) is 85 mm

focused
05-19-2009, 05:05 PM
i use home made stinger , i have a lathe and milling machine .......
stinger length (from transom to DD) is 85 mm


Will it be adjustable ? i will measure my setup tomorrow from bottom to centre shaft.


Michiel.

cacofonix
05-19-2009, 05:09 PM
only angle can be adjust

EPower
05-19-2009, 05:31 PM
only angle can be adjust

that is all you need, changing angle will push the bow of the boat up or down
i was going to use the trimax in my boat but after taking a good look at it i opted for the stinger
1: it would allow me to have my shaft as low as possible
2: it also let's me run smaller props and that gives me less prop walk
as you can see in the vid of my boat it run's straight and fast with no bad habits I will take some more video this weekend running my new Hyperion 35c batt

Just take a look at the trimax setup and you should see what i mean
that's my two cent worth :beerchug:

cacofonix
06-01-2009, 12:21 PM
hi folks

i test it last WE, i really enjoy this hull, much fun !!
but one problem : the brand new feigao 12Xl burnt after 4 run ......
it was with a X445 mod.

another point, very difficult to reach max speed : a lot of rolling
do you think that adding 2 turn fine will help ???

thanks

herve

Flying Scotsman
06-01-2009, 01:03 PM
A 12XL and 6S are borderline on a X445...modified? and was the boat running wet? Were the 4 runs on the same day and what were the temperatures and what was the CG?

Douggie

cacofonix
06-01-2009, 01:24 PM
yes a modified x445, K48 was ok, but with the modified X445 it was .......awesome

when motor burnt, T° were:
motor :185° with smoke
ESC : 122°
LIPO : 95°

motor stop after 7 minutes.

thanks

herve

Flying Scotsman
06-01-2009, 02:11 PM
It looks like you just had too many volts to the motor.

Douggie

cacofonix
06-01-2009, 02:18 PM
anyway, motor is dead
just to check, on this motor i change ball bearing with boca bearing sell by steven
to me, when i turn motor by hand it's much more harder than with original BB.....

hopefully a friend of mine had a motor to lent me, an outrunner a KD600L.
it fit very well in the hull !!!!

but i still have rolling problem ..

herve

Flying Scotsman
06-01-2009, 02:51 PM
It sounds like you installed the bearings incorrectly. Show us a picture of the transom hardware

Douggie

cacofonix
06-03-2009, 03:25 AM
hello

here are some pictures :
http://img207.imageshack.us/img207/9651/lizarddedans.jpg

on this one, rudder is .... not as it was, i reduce width during session, trying to reduce rolling effect .....
http://img13.imageshack.us/img13/817/lizartrans1.jpg

another one :

http://img19.imageshack.us/img19/5726/lizardtrans2.jpg

few ideas i have :

- change rudder to reduce widht and thickness
- add a turn fine

just also wondering if having rudder so close to propeller, is really good ....

herve

ozzie-crawl
06-03-2009, 06:03 AM
mite be the camera angle but it doesnt look like you have much rudder below the prop

cacofonix
06-03-2009, 06:47 AM
i measure from transom to:
- begining of DD : 82 mm
- rudder rotation axis : 92 mm
- back of rudder : 120 mm

rudder width : 25 mm

propeller and rudder are lined up .... i think that flow create by each blade is disturbed by rudder
and create rolling ....

herve

Flying Scotsman
06-03-2009, 11:56 AM
mite be the camera angle but it doesnt look like you have much rudder below the prop

I agree, how long is the rudder and if you look at the centre of the prop what is the length of the rudder that is below this centre line?

Douggie

cacofonix
06-03-2009, 12:15 PM
horizontaly or verticaly ?

ok i will draw some thing

thanks

herve

Flying Scotsman
06-03-2009, 12:26 PM
Vertical position as viewed on the horizontal prop placement

Douggie

cacofonix
06-03-2009, 12:53 PM
ok, so when propeller axis is perpendicular to transom
from this axis to hull V = 10 mm
from V to rudder bottom = 35mm

so 45 mm from prop axis to rudder bottom

rudder with is 25 mm, i think too much

herve

Flying Scotsman
06-03-2009, 01:34 PM
Herve, I still do not understand but your rudder length looks way too short and is causing your problems. Buy a longer one and try it, as it is very easy to shorten. The width and thickness should not cause your problems. Trim tabs are another option, but from viewing your photos the rudder length looks like the culprit

Douggie

cacofonix
06-03-2009, 02:02 PM
hi douggie

what did you not understand ?

i measure again, total rudder lenght : 110 mm
from bottom V to rudder end : 35 mm

i'm not lucky, i reduce rudder lenght last week ......

herve

Flying Scotsman
06-03-2009, 02:27 PM
Ok, how did the boat perform prior to cutting the rudder. Pour moi je pense qu'est votre probleme....please excuse my bad French

Douggie

cacofonix
06-03-2009, 02:29 PM
yes great french !!!

in fact i did'nt try it before cutting rudder ..... what a shame !!

herve

DISAR
06-03-2009, 11:50 PM
I also think that your rudder is too short. I had similar problem with longer rudder though but each boat is different. What I would suggest is:a
a) Place your batteries in the boat so that there is more weight on the left side as you look from behind and test
b) Put a longer rudder and test
c) Add trim tabs and adjust as this thread describes posted by Jeff

Your rolling is caused by the proppeller torque, the motor has the tendency to roll the boat on the opposite side that the prop rotates

http://www.rumrunnerracing.com/feforums/showthread.php?t=28536

cacofonix
06-04-2009, 02:48 AM
pfffioouuu, ok i will take time to read this, thanks !!

@disar : lipo pack is already on the left, so i can't do more.
for you the fact that , horizontaly, propeller and rudder are aligned , don't cause any trouble ?

i also tested a K45 and K48 : same

if possible, i will test a 3 blades prop, hope steven has stock.

but first i will rebuild a new rudder.

thanks folks

herve

cacofonix
06-04-2009, 06:50 AM
hi

here is a video done last we : http://www.vimeo.com/4985907

orange one is mine.

herve

cacofonix
06-15-2009, 02:28 PM
hi guys

new runs last saturday with a brand new rudder, longer, thicker and i also reduce width.
steering is more sensitive, but it don't solve the problem.
when hull start rolling ..... i must reduce throttle to avoid.............crash

i think problem is lipo pack position, i use a 6S1P pack, stick on the left. i think this made CG to high .

so lot of work to come ..... because i must move back motor also.

herve

lyndon915
06-23-2009, 11:42 PM
Ok guys I need help,
I am having a huge problem with my new lizard extreme trying to turn hard right. I compensate for this with lots of left trim on the rudder and the boat but use all the trim the radio has and it still turns right. If i counter stear to make it go strate the boat tilts to the left as it runs strate along the water. I have tried everything from prop adjustments and to adding trim tabs and turn fins and cannot get the problem to go away. Today the boat would seem to run ok for a pass or two then hook hard and I would be back where i started.
I need ideas on how to fix this!
My setup is as fallows.
Lizard extreme
Feiago 12 xl on 6s
x445 prop
speedmaster hardware just like the other lizards in this thread.
My CG is right at 9.5 inches.