twin AC R42 build

[meangenesracing]

Hello, I tried to sell these motors and ESC'S with no luck. so I'm going ahead with this build inspired by Shawn ( Sirlash) lol. Converting this from gas build that never got finished. I have 2 neu 1515 1650 KV MOTORS AND 2 Etti speed controls plan on 5s per side. center mounted counter rotating props. and skag struts any input would be appreciated

[TRUCKPULL]

Eugene

With 5S per side in that large hull, you may need more then a 120A ESC.

I run a 36" Avenger twin for racing Oval and Offshore classes
6S per side
Trunigy marine 180A-V2's
TP4050's -1575KV motors
45mm- props

https://www.facebook.com/groups/1675...1255439039918/

Larry

[srislash]

Haha, I am planning on using my Etti 120’s as well but with a pair of TP 4050 950kv’s on 10s which I’ve had around forever.

And Gene I have logs stating 190 amps on BlownAway. Mind you those are Castle 1717’s and I think that boat is on the heavy side.

[photohoward1]

1515,s are way too small. Maybe 1521 per side or best 1527 per side. That’s a big boat. I built one with a 3080 Lehner and one with a 2030 NEU. 70 mph boats. I now run a Top Gun with duel Pletts and a dual Flier 300.


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[Fluid]

Howard is right, the motors are too small with too high a Kv for 5S. The props will be too small for decent efficiency. I raced this hull on 10S with a single Neu 2215 and x462 prop, it needs some power to perform well.


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[meangenesracing]

thanks everyone for the advice looks like I'll have to look for some different motors.

[meangenesracing]

How about the TP 4070 4Y 1090 KV would that work?

[rol243]

I thought you could go up to atleast 1600 kv,s running 6s in oval race trim, so you would think a 1600 kv motor running 5s would be fine.

[Lone-Wolf]

How about the TP 4070 4Y 1090 KV would that work?

For what it's worth, in my dual powered 50" H&M Supercat XL I run the same motors, TP 4070 1090Kv on 8S/side with a X447's and it moves the big hull easily with decent runtime, for more speed I'll run reduced (50mm) X457's and motors easily turn them too. For esc's I'm running MGM 25063's but certainly more esc than is required but the headroom is nice.

[meangenesracing]

For what it's worth, in my dual powered 50" H&M Supercat XL I run the same motors, TP 4070 1090Kv on 8S/side with a X447's and it moves the big hull easily with decent runtime, for more speed I'll run reduced (50mm) X457's and motors easily turn them too. For esc's I'm running MGM 25063's but certainly more esc than is required but the headroom is nice.

can you tell me what batteries and how many mah per.
battery thanks, geno

[Lone-Wolf]

can you tell me what batteries and how many mah per.
battery thanks, geno

I run Revo 70C 5000ma packs.

[srislash]

I run Revo 70C 5000ma packs.

Just 1p per side Steve?

[meangenesracing]

I run Revo 70C 5000ma packs.

diden't know Revo made 8s packs

[gsbuickman]

Yeah, that sounds about right and should be just fine in that boat. If you set it up as a twin with each motor running 5s , you're only looking at 29,280 rpm's per motor

[srislash]

Geno, what size props are you aiming at? I am running 447’s on BlownAway with the 1717’s(1577kv) on 6s and that gets me 70’ish miles per hour. I am getting 4mins runtime but that is with 8,400-8,800mah per side.
I would just like to try a lighter setup.

[meangenesracing]

I do have a set of 447"s but could get bigger ones also

[srislash]

I do have a set of 447"s but could get bigger ones also

I just ordered a pair of CNC 50mm/2’s in bronze to try on that one. So as soon as they arrive I’ll toss them on and get back to you.

[meangenesracing]

ok, I'm thinking that's the direction I'm going with the TP 4070 motors. I've been wanting to try the TP motors. thanks again

[meangenesracing]

yup, that's my plan 8mm shafts. thanks for all the help

[meangenesracing]

got these in the mail today they should do the trick. 4070 1090 KV

[Lone-Wolf]

NICE! Now you're cooking with gas!

[meangenesracing]

got some work done this weekend. motors are a little forward than I would like but had a hard time with stuffing tubes being to short and flex cables with to much binding. I'm sure I can make up for it with battery placement. just waiting on my full hatch to set cog.

[srislash]

got some work done this weekend. motors are a little forward than I would like but had a hard time with stuffing tubes being to short and flex cables with to much binding. I'm sure I can make up for it with battery placement. just waiting on my full hatch to set cog.

Oh I didn’t think of that with the motors on tunnel. Maybe ESC’s over Motors if need be. That hatch is tall for the gas engines.

[srislash]

So how far from transom did you get the motors Geno?
And if it helps progression my hatch weighs 18oz and it’s cg is at 13.5” from the front hatch lip opening.

[meangenesracing]

So how far from transom did you get the motors Geno?
And if it helps progression my hatch weighs 18oz and it’s cg is at 13.5” from the front hatch lip opening.

1 foot center of motors to transom.

[meangenesracing]

How does this happen ? I was programming esc plugged into 8s and smoked controller not even running motor. tha other esc is getting warm just plugged in

[srislash]

How does this happen ? I was programming esc plugged into 8s and smoked controller not even running motor. tha other esc is getting warm just plugged in

Ok Geno, I plugged 8s into all three that I have sitting here. No heat developed. Soooo, I guess I gotta ask where you got them? New faulty?

[meangenesracing]

Ok Geno, I plugged 8s into all three that I have sitting here. No heat developed. Soooo, I guess I gotta ask where you got them? New faulty?

bought new here from Steven. I hooked the other one up again and it's not getting warm now. maybe I had a loose connection I will keep an eye on it thanks again Shawn

[srislash]

That is not right.

[NativePaul]

Were both BECs conected?