RC Boatworks Top Gun

[oscarel]

Last month I thought I'd buy myself a new toy for my bday and I ended up buying this beauty in all yellow. I figured I could run a Neu 1527 1.5Y on 10s to be in the mid 50's since it wasn't much longer than the old Hydro Sport I had. Well, the 1527 looks tiny in this thing and I was reading FighterCat57's build thread from last year on a Sprint Cat this same size and I'm rethinking since I also have two 1717's left from the Castle sell and I'll run them on 6S2P per motor starting with CR X447's. All help is appreciated and here's my shopping list.

RC Boatworks Top Gun 42" X 16.5"

2 Castle 1717
2 Swordfish 240hv
2 3/16 Speedmaster stinger struts
2 .078 wire drives with 3/16 shaft will swap out for .093 when couplers arrive
1 Speedmaster 40 rudder w/ 5" setback
1 Hitec HS-5805MG - now using Hobbico CS-170 smaller size same torque
Motor mounts will have to be made

So here are the first couple of questions I have, for the struts is 3.25" long enough?

[oscarel]

That's a HOTR 32" cat sitting on top if it! These are with the 1527 in there.

[oscarel]

And this is with the 1717 in the sponson and 4 3S batteries behind and ESC on side. Motor is centered on the 30% mark and it balances with the batteries where they are minus struts and rudder.

[RandyatBBY]

It reminds me of my 41 inch Striker cat. i race it on 10S with a 2230 1Y, lots of fun! I was real surprised with the 1527 1.5Y it pushes a 1/8 scale hydro real well.

[oscarel]

Well, I went ahead and started with the twins so that I wouldn't second guess myself later. I'm sure I'll find something for the 1527 later. What does your Stryker weigh with the 2230? Are you running 1P? Also I think I'm going to go with a 6S3P setup paralleled to both motors to try and save on a set of lipo's.

[oscarel]

Struts and rudder came in today, mocked up. I went with the 3/16 struts since OSE only had 1 of the 1/4.

[RandyatBBY]

If I remember right it it was in the 16 pound range. I ran it on 10S2p. Speeds were in the high 60ties.

[Brushless55]

I dig the looks of this hull..

[oscarel]

Thanks Brushless, I'm hoping it runs which it should with these motors. I've got the struts and rudder in and one CF mount made. Boy cutting this CF sucks! I burned up a Dremel tungsten bit and a scroll saw blade. I ended up just using a metal cuttoff wheel and free handing it.

[oscarel]

If I remember right it it was in the 16 pound range. I ran it on 10S2p. Speeds were in the high 60ties.

Wow, that's not bad! This hull weighs 10lbs empty so I'm sure I'll be close to the 20lb mark once it's done. I'll be more than happy if I get to those numbers!

[oscarel]

Got a lot done today, stuffing tubes in, motor mounts in, incoming cooling lines done, steering servo mounted. I got a little carried away with the hot glue gun on the rudder and I'll go back and clean it up later. 1 esc mounted with velcro.

[ctstike]

nice boat! how can u build boat i mean wer i can find the scorpion out runner and turnigy lippos 7s?

[oscarel]

Well, you find the boat you want, search here to see what others have used, buy what you can afford then start building. www.innov8tivedesigns.com sells Scorpion or you can google search. Hobbyking.com sells Turnigy.

[oscarel]

Maiden run today wasn't that great. First I had issues with the set screw couplers but I got that fixed. Now it runs extremely wet and I've got the batteries as far back as I can, so I'm going to move the motors back a few inches. When I originally set it up I marked what was suppose to be 30% but I got my math wrong so now I'm setting it up so that with the batteries all the way back it's at 25%. Eagle tree showed speed of 37 so I've got a lot of work to do, this thing should be at least 20mph faster.

[keithbradley]

How are your temps/current draw? I wonder if a prop up would help get it out of the water and moving...
What was the COG at when you ran it? You said it was supposed to be 30% but it sounds like you are implying that it wasnt.