PDA

View Full Version : Newbie!!..got some questions for yall!!



04deezelram
04-07-2010, 09:24 PM
Ok guys im new to rc boat, and i got an apache for a good deal...so i gutted it and put fiberglass to reinforce the hull...im wanting to go brushless and ill be using 2 EP4500 6 Cell 7.2volt NiMh Sub C Pack in parallel...i also have a prop from a bruhless blackjack which is 1.6" x 2.5".....not sure what kv motor i should get??

tiqueman
04-07-2010, 09:29 PM
Welcome to the forum!

Im not real familiar w/ the Brushed Apache. I do have the Black Jack. The stock motor in that is about a 1500KV. I recon that would be a god starting point for you. But go to Lipos asap.

Hobbycity.com = stupid deals on lipos

-Scott

04deezelram
04-07-2010, 09:53 PM
Welcome to the forum!

Im not real familiar w/ the Brushed Apache. I do have the Black Jack. The stock motor in that is about a 1500KV. I recon that would be a god starting point for you. But go to Lipos asap.

Hobbycity.com = stupid deals on lipos

-Scott

ok thanks for the website.....what kind of lipos are good...not sure what discharge or mah?...sorry new to the lipo battery

tiqueman
04-07-2010, 10:05 PM
You want a minimum of a 20C. If you can afford it, go 30 or even more. Batteries will stress a lot less. As for mah, in a parallel set up, minimum of maybe 5000 total would be a great start. So 2, 2500s or so. Or if you wanna go and can fit more, go more. Some guys run up to 10k mah. I havent seen it personally. I have seen 8k. Gives a good run time w/ a lot of punch. Just remember, boats stress out equipment a lot more. So coming from planes or cars etc, the amp draw is much much less. Boat equipment gets hot. Whatever you do, check temps often especially on its first couple runs.

Oh and the Turnigys are fantastic. Lots of people are having much success w/ them. Ive got several of my own...

Diesel6401
04-07-2010, 10:07 PM
For lipos's 25c and higher good place to start, I myself try and run 30c and up. Not sure if the BJ prop is going to work for you. I think, but maybe wrong that the bj is 3/16 drive and the apache is 1/8 drive. Not 100% sure on that. If im right you may need this http://www.offshoreelectrics.com/proddetail.php?prod=ose-1035 Also I don't think that hull can handle much over 25mph once again I may be wrong ( and ususally am lol) on that.

If am not mistaken its a tight fit for batteries in that boat and I have one laying around my garage (a friends) and I think my tenergy lipos where all that fit because they were shorter and thinner than any turnigy or zippy i have.

Make sure you have a charger that can charge lipo's and also read this before you start. http://forums.offshoreelectrics.com/showthread.php?t=12020

Welcome :banana:

yea like tiqueman said turnigy's and zippys are the $**t, i run a crap load of them myself.

tiqueman
04-07-2010, 10:12 PM
[QUOTE=Diesel6401;173388]For lipos's 25c and higher good place to start, I myself try and run 30c and up. Not sure if the BJ prop is going to work for you. I think, but maybe wrong that the bj is 3/16 drive and the apache is 1/8 drive. Not 100% sure on that. If im right you may need this http://www.offshoreelectrics.com/proddetail.php?prod=ose-1035

QUOTE]

I know the BJ is not a 3/16 shaft... a 3/16 prop on it does need a sleeve. Not sure if its 4mm or 1/8... cant remember :confused2:

And Diesel... putting words in my mounth :roflol: they are the $**t :rockon2:

04deezelram
04-07-2010, 10:15 PM
Thanks diesel for the link...it answered most of my questions....pic to follow tomorrow

04deezelram
04-07-2010, 10:20 PM
QUOTE]

I know the BJ is not a 3/16 shaft... a 3/16 prop on it does need a sleeve. Not sure if its 4mm or 1/8... cant remember :confused2:

And Diesel... putting words in my mounth :roflol: they are the $**t :rockon2:[/QUOTE]

I have actually used the BJ prop on my boat when i had the brushed motor in it...it came with a brass sleeve and seems to work

Diesel6401
04-07-2010, 10:26 PM
Thanks diesel for the link...it answered most of my questions....pic to follow tomorrow

Glad to help. Lot's of good info on this site and good people like tiqueman :hug1:

Diesel6401
04-07-2010, 10:28 PM
I remember I put my Rio Ep prop 40mm or 42mm 1/8 drive on my friends Apache and it was a bat outta hell out of the gate until the motor blew :tongue_smilie:

04deezelram
04-07-2010, 10:31 PM
I remember I put my Rio Ep prop 40mm or 42mm 1/8 drive on my friends Apache and it was a bat outta hell out of the gate until the motor blew :tongue_smilie:

Was that on the stock apache drive??

Diesel6401
04-07-2010, 10:41 PM
Was that on the stock apache drive??

Yea it was stock. I was right when I got into boating and had NO CLUE what I was doing (still don't have a clue lol) and blew the motor. O I also almost sunk it.

tiqueman
04-07-2010, 10:43 PM
Glad to help. Lot's of good info on this site and good people like tiqueman :hug1:

Awwwww Diesel.... :hug1: Im gettin all choked up :crying:

Yes there are many, MANY great people on here. Best forum to belong to.

Diesel6401
04-07-2010, 10:50 PM
Awwwww Diesel.... :hug1: Im gettin all choked up :crying:

Yes there are many, MANY great people on here. Best forum to belong to.

HAHAHAHAHA :roflol::laugh:

04deezelram
04-07-2010, 10:50 PM
I remember I put my Rio Ep prop 40mm or 42mm 1/8 drive on my friends Apache and it was a bat outta hell out of the gate until the motor blew :tongue_smilie:

Haha sounds like something I would do....anybody know what kv would be good for my boat....I'm looking at the feigo 540l

tiqueman
04-07-2010, 10:56 PM
Im running a motor similar to a 540L size in my BJ now on 3S. its a 2045 KV and Im getting about 37mph and temps are under 100F.

I just realized my comment above on the BJ motor, on 2S (7.4V) , you want a bit more kV than 1500. Maybe a 8L? I will let others chime in on this one.....

Diesel6401
04-07-2010, 11:12 PM
Haha sounds like something I would do....anybody know what kv would be good for my boat....I'm looking at the feigo 540l

Don't forget you need a brushless esc. http://www.hobbycity.com/hobbyking/store/uh_listCategoriesAndProducts.asp?catname=Brushless +ESC&idCategory=256&ParentCat=254

tiqueman
04-07-2010, 11:14 PM
Oh yeah, I meant to mention that as well... :doh:

Diesel6401
04-07-2010, 11:17 PM
A marine 120amp esc and 8L on 2s should be OK. Or just use the whole proboat widowmaker package although, I think their is less expensive ways. A 540L maybe a little to much, maybe a 80amp esc on 12s.

Diesel6401
04-07-2010, 11:42 PM
Good option http://cgi.ebay.com/Brushless-motor-BL3656-KV2600-and-150A-ESC-Water-Cool_W0QQitemZ150423745162QQcmdZViewItemQQptZRadio _Control_Parts_Accessories?hash=item2305f4328a

04deezelram
04-08-2010, 08:21 AM
I have a hobbywing 90amp esc and programing card on the way......diesel do you think the 540L is too big??

04deezelram
04-08-2010, 08:26 AM
Also does anybody know where I can get an apator to run a motor with a 5mm shaft and attach it to the 1/8 stock flexshaft?

Diesel6401
04-08-2010, 10:51 AM
Also does anybody know where I can get an apator to run a motor with a 5mm shaft and attach it to the 1/8 stock flexshaft?

Here on OSE of course.
http://www.offshoreelectrics.com/products.php?cat=Motor+Couplers


Read this also and check the youtube video out in one of the post, pretty cool.
http://forums.offshoreelectrics.com/showthread.php?t=10491

tiqueman
04-08-2010, 12:47 PM
I looked on there Deisel before you posted... I didnt see and 5mm to 1/8 (or about 3mm). Actually, would a 5mm to .130 work? http://www.offshoreelectrics.com/proddetail.php?prod=ose-str-ci .125 is 1/8. Id imagine thatll do it.

04deezelram
04-08-2010, 01:00 PM
I looked to and didn't see it...but didn't want to feel stupid

Diesel6401
04-08-2010, 01:01 PM
I looked on there Deisel before you posted... I didnt see and 5mm to 1/8 (or about 3mm). Actually, would a 5mm to .130 work? http://www.offshoreelectrics.com/proddetail.php?prod=ose-str-ci .125 is 1/8. Id imagine thatll do it.

Yup, the .130 should work fine, even this may work http://www.offshoreelectrics.com/proddetail.php?prod=oct-ocfhe5mm13S

tiqueman
04-08-2010, 01:22 PM
Yup, the .130 should work fine, even this may work http://www.offshoreelectrics.com/proddetail.php?prod=oct-ocfhe5mm13S

That one may work beter than the straightbore w/ set screws would. Being that is the collet clamp type.

Diesel6401
04-08-2010, 01:36 PM
That one may work beter than the straightbore w/ set screws would. Being that is the collet clamp type.

:iagree:
Plus it's the short version for a tight space and if I can remember theirs not a whole lot of room between the motor mount and battery tray.

04deezelram
04-08-2010, 04:39 PM
Ok thanks guys....I was going to order that engine off of eBay but it said it was going to be 10 days to ship it!

04deezelram
04-08-2010, 06:04 PM
Im a little rusty on fiberglassing
[URL="http://i543.photobucket.com/albums/gg472/deezelram/1270763932.jpg"]
Blackjack fins and a new water pickup
http://i543.photobucket.com/albums/gg472/deezelram/1270763953.jpg

FE Wannabe
04-16-2010, 06:03 PM
I just saw your post.
I have an Apache that I converted to brushless.
Here is my setup:

Feigao 540 10L 2458kv
3S 11.1v 500mah lipo
Hacker 70-3p 70amp ESC
converted to .130 flex cable
separate strut and offset rudder
Y534 plastic prop.

This conservative setup looks like it is pushing 30mph maybe more and nothing gets over 110 degrees. An L sized 540 is a little overkill for a boat this light, but it will last forever.

One thing you will notice once you start getting some speed out of this boat is that the steerable outdrive will cause the boat to flip if you try anything but huge sweeping turns. That is why I switched to a separate prop strut and rudder. It is much more controllable.
Your turn fins will help to a point, but they are more of a bandaid than a fix. It all depends what you want out of it. If you want to go fast in a straight line and take it easy in the turns it will work, but with fast turns, you better have a rescue boat at the ready.

The plastic U joint will not hold up too long under brushless power either, that is why I converted it to a .130 flex cable as well.

Also, if you haven't done it yet get some pool noodles to put in the bow, because when it flips you want it to float, for obvious reasons.:biggrin:
Make sure also to tape the hatch to make it as waterproof as possible.

It is a fun boat to modify and it is a good learning platform.
Let me know if you have any further questions.
Brad

SweetZ28
04-28-2010, 02:53 PM
After going through some phases with my boat and talking with FE wannabe i got everything worked out .
here is mine in action it shows what my set up is.
http://www.youtube.com/watch?v=sibSxqJVlUc