Whiplash 40 Hydro,,,,,

[txboatpilot]

Just thought I would start a build thread on my new Whiplash 40 Hydro... It will be running a Neu 1527/1Y (1250KV), MGM 16024-3 esc, 2x 6S 5000mah 25C lipos, all Speedmaster hardware and some TLC...

Just getting it ready for paint.. I installed the motor mount, stuffing tube, hardware...

Now on to some cutting of the front bulkhead, to fit the lipos...

I will post pictures as I get it finished, followed by some video when it is ready to RUN!!

[tth]

Very nice indeed. Clean lines. It should haul on that 1527.

[mobychev]

another whip 40

Hi txboatpilot
I am at the same build stage as you
but cant decide on how to get the 6S lipos in the hull they are like bricks Where are you putting yours?
I have a 1527/1.5d, if I cant run it on 6s I might have to look at 8s 1p,they fit in nicely
Graham

[10gauge]

Tx, hydro looks great! It should be an excellent build and a great performer. I just ordered a similar hydro, the Phil Thomas SS45. After much thought, between the 1527/1Y and the 1527/1.5D, I finally decided get the 1527/1.5D (1500kv) for 6S2P. Good Luck with the build.

[txboatpilot]

mobychev::: I am cutting out the front bulkhead, and putting the 2 packs in front of the motor..

10gauge::: I also looked at the SS45, very nice indeed.. I just wanted to try my hand at building for once.. I acually have enjoyed the process, now just cant wait to finish and run it..

I see both of you went with the 1.5D, why? I am curious to see what props you both end up running with the 1.5D winds..

[calcagno45]

Tx- I love that boat! She's a beauty!!

A guy in my town runs the Whip40 with a mildly modded Zenoah on Coleman fuel(80ish octane) and she purs at 64mph all day, in the straights and the turns! It is a real beauty up close and on the water. But doesnt like to turn the other way... lol

Here is a recent video: about 60mph

http://www.youtube.com/watch?v=PZAxYe1uZT4&feature=channel_page

Since, the motor has been modded a little more.

I want to do this same build but I think I'll end up with the Whip20.

[10gauge]

Tx, I wish I had the time to construct a wooden boat like yours... Perhaps someday.

The SS45 will be the largest hull that I will have setup. With the larger hull size, I reason that I'll have more stability at higher speeds. Apart from my other sport builds, I want to go a little crazy on this one and build a borderline SAW/fast oval racer.

Since both motors are large and powerful, the motor choice was simply based on rpm. Running the 1Y on 6S @ 27750rpm seemed a little too low, vs 33,300rpm with the 1.5D. If it were a mono or cat, I wouldn't mind. I suspect that with a hydro design, there wouldn't be much hull slip to factor in like a mono or a cat, so having all that torque on the 1Y might not be necessary. I figure that having slightly less torque and higher rpm would be more versatile for my goal. Furthermore, I don't want to rely on too large a prop on a lower rpm setup to obtain high speed. For a hydro, I think that it could lead to undesirable effects at very high speeds, like propwalk, sponson lift, etc. That's why I went with the 1.5D over the 1Y.

[mobychev]

that was pretty well my reasoning as well.
also theCastle controller application chart recomends that motor for sport hydro '34-40inch'
What do you think of 8s in this setup?? thats 44,400 rpm ihave hydra 240HV.
Mraham

[10gauge]

Graham: Personally, 8S on the 1.5D is too much. Your current load will be very high and @ 44,400rpm you'll be limited to running small props on a large hull. Then you won't have enough prop surface to run efficiently. If you're intent on running 8S, use the 1Y, even @ 37,000rpm it's a little high. But for the 1.5D, I'd run 6S.

My setup: 1527/1.5D, 6S2P/10000/25C, HV-240, Speedmaster HW, 0.187 Flex (no liner). Start with x445. Ultimately, an m645 to 452/3 prop might yield my 65mph+ goal.

Tx, keep us posted on the development of the hydro... You always seem to have great results with your builds!

[txboatpilot]

A guy in my town runs the Whip40 with a mildly modded Zenoah on Coleman fuel(80ish octane) and she purs at 64mph all day, in the straights and the turns! It is a real beauty up close and on the water. But doesnt like to turn the other way... lol

That Whip in the video looks way to large to be a Whip 40?? It is most likely the GAS version..

I want to do this same build but I think I'll end up with the Whip20.

I am going to build a Whip 20 for P-Sport Hydro or 4S2P...

[txboatpilot]

Tx, I wish I had the time to construct a wooden boat like yours... Perhaps someday.

The SS45 will be the largest hull that I will have setup. With the larger hull size, I reason that I'll have more stability at higher speeds. Apart from my other sport builds, I want to go a little crazy on this one and build a borderline SAW/fast oval racer.

Since both motors are large and powerful, the motor choice was simply based on rpm. Running the 1Y on 6S @ 27750rpm seemed a little too low, vs 33,300rpm with the 1.5D. If it were a mono or cat, I wouldn't mind. I suspect that with a hydro design, there wouldn't be much hull slip to factor in like a mono or a cat, so having all that torque on the 1Y might not be necessary. I figure that having slightly less torque and higher rpm would be more versatile for my goal. Furthermore, I don't want to rely on too large a prop on a lower rpm setup to obtain high speed. For a hydro, I think that it could lead to undesirable effects at very high speeds, like propwalk, sponson lift, etc. That's why I went with the 1.5D over the 1Y.

That makes alot of sense,, I went with the 1Y because it seemed more versitile, Mono, Cat, or Hydro no problem... If I were doing a rigger, I would try the 1.5D..

Also I looked at Raydee's SS45 with 6S2P and 1Y, going over 60+ very easy with no prop walk or sponsoon lift... Looked to be running very nice, temps are great with his set-up as well... Dont know which prop he is useing? here is the video..

http://www.youtube.com/watch?v=FROI2ttRQis&feature=channel_page

[Fluid]

What do you think of 8s in this setup?? thats 44,400 rpm ihave hydra 240HV.

Like stated above, that is too hot for 8S1P - it is a SAW setup. You will burn up your 240HV guaranteed.

For that hull I'd not plan on using 8S for any power increase over 6S. The advantage of 8S for that hull would be the ability to have the same amount of power as a 6S setup without having to pull as many amps, thus it is easier on all your equipment.

Bottom line - you will either have to make the 6S packs fit or get a different motor with a lower Kv if you want to run 8S1P.


.

[calcagno45]

That Whip in the video looks way to large to be a Whip 40?? It is most likely the GAS version..

Ahh, yep. I asked him and measured it to make sure. It sure it the gas version. She sure is nice and runs great.

[txboatpilot]

Ahh, yep. I asked him and measured it to make sure. It sure it the gas version. She sure is nice and runs great.

I have not seen a Whiplash I did'nt like.. I am thinking hard about adding a Gas Whip kit to the order when I get my Whip 20.. Should be a nice little FE Hydro fleet.. Nitro and Gas KILLERS!!! LOL

[10gauge]

Tx, I posed the 1.5D/1Y question on RRR. It was 50/50 in either favor. Actually, I've contacted Ray on his SS45 setup. He's running a 1527/1.5D, 6S2P, x447 with speeds of 62mph+. It's an exquisite build - the mount alone looks like DaVinci designed it himself.

All I can say is that these 36" cats and hydros are fantastic to work on! By the way, what's your HW setup? I am planning to use Speedmaster. I am debating whether to use 0.187 Flex cable with NO liner -OR- a 0.078in wire drive. I just had Ned make me two beautiful 8mm to 0.078in couplers. I'll decide once the hull is completed...