OutBoard BlackJack

[Eodman]

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]

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]

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]

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]

ajustible trim wouild be great. ultimate idea

[RCprince]

graupner had that idea https://shop.graupner.de/webuerp/ser...11&language=en

[calcagno45]

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]

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]

Calcagno..what are you gonna put the ep1's on?

[calcagno45]

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]

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]

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]

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]

any link to this?

[RCprince]

http://www.offshoreelectrics.com/pro...rod=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.