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RCprince
04-29-2008, 04:01 PM
I was about to toss my battered BJ Hull, but I decided to experiment with it on 15 beat up nimhs 3600 cells which was originally 18 but 3 blew up in the boat from setting the esc to high, the original BJ Motor and a chipped SV nitro 437/3 prop I got 31mph out of her...it's a fun boat so now I think I'll order a new BJ hull and just keep at as a fun boat.

Eyekandyboats
04-29-2008, 04:27 PM
interesting.
but one thing the BJ already handles like crap and and seems to drive like its top heavy. i think the OB would overdo it every turn.

RCprince
04-29-2008, 04:44 PM
Not at all...it seems like the 3 blade gives stability and it doesn't dive to the right sponson like with the torque from a 2 blade, plus I extended the distance the prop is from the transom....

kburrows
04-30-2008, 04:15 PM
Men, what kidda motor is that, it looks cool is it brushless with every thing to install or you put it together.

crazzy maxx
04-30-2008, 04:17 PM
What Happend To The Bow ???? Looks Killer W? A Outboard On It

RCprince
04-30-2008, 06:34 PM
Men, what kidda motor is that, it looks cool is it brushless with every thing to install or you put it together.It's an Aquacraft EP1 with the BlackJacks Brushless in it. Max the hull got beat up in my pool..I was gonna toss it but I changed my mind and I ran out of 5 minute epoxy so I used liquid steel to seal the seams...Yep I like how it looks, I think now I might get 2 hulls do a single out board and a dual....I might run 2 ammo 3640's 3900kv on 2s lipo each for weight reasons, spinning some 430l/r props

crazzy maxx
04-30-2008, 08:42 PM
twin ammos on a bj would be sick

calcagno45
04-30-2008, 09:22 PM
rcprince, I was thinking of doing the same thing. I have a 30 cat looking something like the Skunkworks hull except it has a standoff on the rear. I want to put a EP1 on there.

What the largest brushed and BL motor the EP1 will take? I'm not looking to overpower it but I want to know my limit. I have a 9L, but i think it will be too small for a 30".

I was also thinking of the dual setup with 2 brushed motors on a traxxas/novak EVX. maybe some titans out of a villian.

I also looked at the Graupner Z-drives too. give that inboard look.

I wasn't looking for speed, just extreme scale looks.

smm_cbf
04-30-2008, 09:25 PM
twin ammos on a bj would be sick

:iagree: :w00t: :w00t:

RCprince
04-30-2008, 10:55 PM
calcagno45 I placed a 9l and 5s running a 637 prop(i changed the prop shaft to an octura 3/16shaft some sanding to make it fit the stock bearings) and it flew on my sv, but I couldn't stop it from chining so I give up. The L size Feigao 3mm shaft is a direct replacement over the stock 55o mtr. The weakest link I must stress are the "brass Gears" you've gotta mesh them right, what I'm finding out is by using my low kv BJ motor(I had to drill out the motor drive dog: also brass to 5mm for the shaft to fit) works perfect I'm guessing because of the low start up rpms...just guessing I'm going put a 5s on it and see what happens. But the outboard housing can basically fit any 36mm can with 25mm diameter nut spacing S and L feigaos would fit, the XXL would need a larger motor cowling. Also Steve here on OSE Sells the replacement gears. Australians seem to like outboard Cat racing
http://www.aopc.com.au/media/index.html

http://www.aopc.com.au/media/02-10-07/images/56.jpeg

calcagno45
05-01-2008, 12:05 AM
you got any pics of how you mounted it as far as how high and where at in relation to the bottom of the sponsons or tunnel?

RCprince
05-01-2008, 12:18 AM
I just followed these directions http://manuals.hobbico.com/aqu/aqub7861-manual.pdf

kburrows
05-01-2008, 10:48 AM
say how quick is it with the outboard, i like the look but does it perform, oh cah you trim it. up and down i mean.

Eodman
05-01-2008, 12:47 PM
I have twin EP1's mounted on the back of a Mean Machine I am using the latest Traxxas EVX(part# 3020) & it runs pretty nice! Not real fast but fun! Over the winter I upgraded to 19 turn motors but haven't had it in the water yet! Maybe this weekend if it doesn't rain!

RCprince
05-01-2008, 01:27 PM
Yea I got mines off of 2 profisherman's I had..I I tried 17 turn 15 turn, 12 turn and even traxxas marine 550's..but nothing performed like the feigao 9l..so I'll just stick with Brusshless..plus the benefit of no brushes. Eodman post some pics of It

Eodman
05-02-2008, 08:41 AM
I also moved the motors out behind the sponsons ... they were in the tunnel! Don't have any updated pictures with the new location but here's an older picture!

I have two SV motors that I was considering using. I think I have to take the dogs to a machine shop here in town for the holes to be drilled! This is just a summer fun boat!

In our fleet we have a :

Traxxas Villian EX
2 Supervees
Mean Machine(w/ outboards)
Toysport Twin drive
H & M Mono

My son wants to build a MM with Ferrari graphics this summer .... we'll see how the report card shakes out!

calcagno45
05-02-2008, 03:57 PM
Eodman, I read through your builup in the thread you had. Sounds like fun and I can wait to do mine. Which props are you running? And have you run it since moving the motors to the outer sponson?

I was thinking of a single with a 9L on maybe 10-12 cells on my 30" cat? What do you guys think?

RCprince
05-02-2008, 04:09 PM
sweet Eod....I'm researching where the optimum position are for the outboards on many if not a duallies I see them right behind the sponsons...Also I'm still looking for a machine shop to make me some gears out of the material auto differentials are made of...because I'd love to drop some Neu 1512's spinning counter 442 or even some cmdi's 4bladers the scale look....wow....Just salivating thinking of it.

Wakesurfer
05-02-2008, 10:08 PM
I like the look of the twin OBs. Has anybody tried twin inboards on a BlackJack? Seems to me like the bigger gasser might be a better hull for that kind of mod. Next question, would I need a radio that would allow throttle/steering mixing with twins? Left rudder also slows left drive kind of thing? Might as well throw in a couple of servos for trim control too.

crazzy maxx
05-03-2008, 07:47 AM
ajustible trim wouild be great. ultimate idea

RCprince
05-03-2008, 10:02 AM
graupner had that idea https://shop.graupner.de/webuerp/servlet/AI?ARTN=2339&SessionCheck=4711&language=en

calcagno45
05-03-2008, 01:45 PM
Looks nice, but I cant read the specs on it.

RCprince- how does a Titan 550 fit in there? I have 2 EP1's on the way. I'm thinking of starting with the motors it comes with on a EVX with 12 cells. But I dont know if those stock 550's can take the 14.4v's, so I might swap in some Titans.

Also, would it be best to use a servo on each motor? or a large single servo?

RCprince
05-03-2008, 02:29 PM
I'm not sure if the stock 550's can take 14.4, it was recommend you use a 7 cell, not sure if that was because of esc limits..all 540, 550, 05 size cans will fit as long as they come with the regular 3.2 mm shaft...or you'll have to drill out the drive dog that fits the motor shaft.

PS I redid the link for the English version.

RCprince
05-03-2008, 02:34 PM
Calcagno..what are you gonna put the ep1's on?

calcagno45
05-04-2008, 06:53 PM
A 30" Cat similar to the SKunkworks hull. I'm looking for suitable props tho.

Are you running 1/8 or 3/16 props?

RCprince
05-04-2008, 07:37 PM
I run both, for some reason 3 blades seem to give me better performance....Plus on all real outboards they always run 3 blades or more, reason being I believe the width and and height of the foot interferes with water flow by leaving a traction void in the props pulling effect so three blades help increase surface area when one blade is behind the foot you still have 2 pull water around it. I run the aquacraft nitro super vee 437/3's carbon and a x632, y535 and a x637.

calcagno45
05-05-2008, 11:06 PM
how did you get the 3/16's props to work? the shaft is 3mm or close enough to 1/8?

3/16" would open up my choices on running duals counter rotating.

RCprince
05-05-2008, 11:14 PM
I used an octura I think it was a 4mm to 3/16th threaded end shaft, i just sanded the 4mm side down some to fit the bearing and gear.

calcagno45
05-05-2008, 11:16 PM
any link to this?

RCprince
05-05-2008, 11:16 PM
http://www.offshoreelectrics.com/proddetail.php?prod=oct-ocgcss another thing once you widen the plastic resin stopper that the shaft comes out you can't use the regular shaft any longer, darn I need a lathe/mill. also the largest prop you'll get after you remove the water pick- up is a 40mm I believe. I had 2 ep1's and I cut off piece of the ride plane to fit a 645mm on one of them.

calcagno45
05-05-2008, 11:19 PM
cool. I'll either buy those or try:
http://www.offshoreelectrics.com/info-pages/fit-propellers.php

RCprince
05-05-2008, 11:28 PM
Well I'd try that the adapter first, The Black Jack uses one, it's shaft is 1/8th, I'm not sure if there's enough length on the ep1 shaft though to fit a 3/16th prop hub.

calcagno45
05-05-2008, 11:38 PM
sounds good. using those adaptors I should be able to run CF40 props couter rotating.

RCprince
05-05-2008, 11:47 PM
Thats the octura shaft and a x645 cut down and detongued to a x640

calcagno45
05-06-2008, 05:10 PM
check this one out:
http://cgi.ebay.com/Custom-Built-30-V-Hull-Boat-with-Dual-Outboards_W0QQitemZ200221619043QQihZ010QQcategoryZ 2564QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

what props does that look like?

RCprince
05-06-2008, 06:10 PM
those look like 430's the problem with a vee hull is the chine walking..I've tried and given up...A cat has 2 hulls to displace the the prop walk better, but it looks cools though..I like to see it run, by looking at it's setup the batteries toooo far back.

Eodman
05-07-2008, 01:21 PM
Well guys I took my cat out at lunch for a quick test drive .... well everything got real warm - esc shutdown ...etc...

RCprince could you post a couple of close ups of your cooling solution? I think the motors aren't get enough water to cool them down!

I upgraded to Reedy Spec 19 quad mags & when I put the cooling coils on them they probably are not tight enough! I'd try the silicone cooling jackets that Steve sells if I can figure out the correct size! Any help ????

RCprince
05-07-2008, 02:12 PM
I'm using a BJ Motor http://www.offshoreelectrics.com/proddetail.php?prod=dh-prb3310
which looks like a himax 6 pole 3630-1500 which is 87% efficient and a CC Barracuda 125 cooling is not an Issue...i'm not sure if those 19's have enough torque to be efficient enough to push that hull, what size props are you using....

calcagno45
05-07-2008, 05:50 PM
Well guys. I just got my order of 2 EP1's in today and I must say I'm impressed. They are way bigger than I thought they were. I can't wait to mount them on a hull. I decided to rebuild my Skunkworks with the 9xl and stuffing tube set up. So now I need a hull to put them on.
Any ideas/suggestions on a good hull?

RCprince
05-07-2008, 07:22 PM
If your gonna run the 9XL your gonna need to drill out the drive dogs...and you gotta re mesh those gears right or you'll be Steve's best order buddy.

jeff180
05-07-2008, 08:03 PM
So when you gonna run it?

crazzy maxx
05-07-2008, 08:15 PM
ok enough picsture and talk GET A VIDEO!!!!!!

RCprince
05-07-2008, 09:22 PM
I love it
http://gballough.googlepages.com/UMMandH20-boatsinDubai.JPG/UMMandH20-boatsinDubai-full;init:.JPG
http://doubledgemotorsports.com/db4/00374/doubledgemotorsports.com/_uimages/allcameraphotos407065.jpg

calcagno45
05-07-2008, 10:07 PM
Nah, I'm not throwing the 9XL in there. I'm looking for a good hull to run the dual EP1's on now.

I already have someone making the "Merc 2.5" sticker kits for it. LOL :rockon2:

Eyekandyboats
05-07-2008, 10:08 PM
i dont know . out boards are just not for me. they look out of place and you cant hang as much power as you can mount inside a hull. :)

calcagno45
05-07-2008, 10:10 PM
Power isn't the issue. First impressions and scale looks count for me too. I didnt plan on racing dual outboards.

RCprince
05-07-2008, 10:19 PM
Me, I want scale and moderate speed...if I could get some harden gears( still looking) I know I could give a comparable inboard a run for it's money if not beat it.

calcagno45
05-07-2008, 10:41 PM
if you find some hardened gears for it, let me know, I want 2 sets.

what hull do you think would be a good choice? I'm totally open... my checkbook isnt tho. lol

RCprince
05-07-2008, 10:57 PM
Honestly I'm not sure...the BJ bare hull is the cheapest..I've seen it for 114.00, but they're out of stock only the 134.00 ones are in stock i like it's look...I think I can get fifty out of it with an outboard

RCprince
05-07-2008, 11:11 PM
2 outboards on this would look hot and scale

calcagno45
05-07-2008, 11:40 PM
Sure would. Just dont want to spend $135 tho lol. Cheap bastard.

Eodman
05-08-2008, 10:07 AM
RC I'm not ignoring you guys ... wasn't online last nite! I don't remember the prop #'s I'm at work now! but I'll look tonite.

I think my problem may be that I'm jumping to LIPO's last summer when I used NiMH the heat wasn't an issue! I smoked one of the 19 t motors yesterday so gotta rethink what I'm doing.

Can anyone suggest 19 turn motors that will work well? Also what diameter silicone water jackets?

I want this boat for fun, but just a little quicker that what the stock EP1's are!

calcagno45
05-08-2008, 02:34 PM
Eodman- what controller are you using? I have a Novak EVX that I want to try out on the stock EP1's but I think I'll burn those motors out being that they are rate for 6-7 cells. I have some Titans 550's to try after that. I just need a good hull to use these on. And I too would like to know what props you are using? and about an estimated speed? Thanks

Eodman
05-09-2008, 09:16 AM
I'm using the Traxxas EVX2, its on Steven's site! I wanted to make the wiring easy so I went with that one! By the spec's it supposed to handle up to 19 t motors!

In stock trim it ran close to 20mph on Nimh, I tried Lipos and saw a 5 or 6 mph jump but burned 1 motor up! I tought it was a cooling issue rather than a Lipo issue but after rebuilding this winter with 19t Reedy Spec motors I just smoked another motor!

So I'm going to order new Trinity 19t Cobalt motors, upgrade to silicon water jackets, relocate water intakes similar to what RCPrince did & go back to NiMH's
to see how that works!

I want to concentrate on running cooler with the motor upgrades then perhaps add the Lipo's back into the equation!

As far as what props I'm using ... they are counter rotating but I have to look I ran out of time last nite!

Oh hell who am I kidding --- I just plain forgot!

RCprince
05-09-2008, 11:08 AM
I'm not sure how those brushed motors are gonna run, compared to a brushed of comparable size which I would say is a...hmmm let say based on magnetic foot print a ammo 3640 size motor and they still have more power than 05's. Heat is the first clue that your motor is inefficient...The motor can't translate the energy from the battery into power so in essence is sort of Electrically stalling from being over worked. The high the turn brushed motor the better...I learnt a lesson from the guys here, they've snapped me out of SOME of my mad scientist ways...for brushless setups, low KV(rpm's) high voltage = better efficiency and likewise for brushed..Me personally if I were to run brushed I'd get some top 27's doubles to quads and lipos...

Eodman
05-09-2008, 11:54 AM
RCprince what brushless motor/ESC are you running in yours?

RCprince
05-09-2008, 12:33 PM
I'm running the BJ motor and A CC 125 barracuda

calcagno45
05-09-2008, 04:34 PM
I wonder how a Feigao 380xl(like SJFE had in the twin BJ) would fit? or would it even bolt up?

RCprince
05-09-2008, 05:00 PM
to small diameter wise...they have to be a 05,540,550 or anything with a 25mm diameter screw pattern

RCprince
05-10-2008, 05:38 PM
Some test run pics with my OB BJ

calcagno45
05-11-2008, 05:05 PM
RCprince- you drilled out the drive dog for the motor to 5mm? to fit the BJ motor?

crazzy maxx
05-11-2008, 05:08 PM
Video!!!!

Eyekandyboats
05-11-2008, 06:47 PM
and how did it turn?
looks unstable to me in just the pictures.

RCprince
05-11-2008, 07:50 PM
Cal yes I drilled out the drive dog....and EyeKandy it's more stable than with the regular out drive. it's still underpowered

calcagno45
05-23-2008, 06:08 PM
I drilled out the drive dog to 5mm for the SV27 system.

I picked up a MRP Tunnel hull to mount it on.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MEWNX:IT&item=260237814583
I love the look of it and the EP1. It is almost perfectly scale, except the driver's head is rather large for the hull, lol.

Do you think I'll need a jackplate of some sort to mount the EP1 on? I just had knee surgery so I wont be able to work on it just yet. But I'll try to get some pics of it and with the motor mocked up in position.

RCprince
05-23-2008, 10:03 PM
Make sure the spacing on the drive dog is right, I place the stock 550 motor with drive dog and the brushless with drivedog head to head to make sure the spacing was right I also use peace on brass tubing on the BL motor shaft for spacing just in case the allen screw was to become loose it would keep the spacing.

calcagno45
05-28-2008, 08:34 AM
I spaced it right comparing it to the stockk 550 out of the ep1.

should I directly mount it to th transom? Or should I make a jack plate?