Fibreglass 1/10 scale drag boat

[hughb]

Here’s the link for more pics of that V8

https://forums.offshoreelectrics.com...light=Tenshock

[Old School]

Here’s the link for more pics of that V8

https://forums.offshoreelectrics.com...light=Tenshock

That scratchbuilt motor is very well done. It must have taken you a long time to complete it.

I decided that the hull needed a little floor strengthening so applied an additional carbon fibre layer to the transom overlapping with the piece added to the floor of the hull, extending up the sides.

Edit: I found this hull with an offset drive.

http://dragboatcity.com/boat-models/rc-hull-4/

[rol243]

You don,t need the right [ starboard ] offset with the hydros as opposed to mono hulls.

[Old School]

This is a few components of the Dragondarkwings 1/10 scale 3D printed motor. Expensive but amazing. Everything screws together with the word's smallest screws. Includes a full size metal gear servo plus another mini type servo that I assume is for operating the butterflies. No instructions are included but I blieve that there are videos on You-Tube.

Edit: link to motor on You-Tube

https://www.youtube.com/watch?v=z9UPCKfY9Ag

[hughb]

Yeah nice. Looks to be a perfect height as well for the bug catcher to clear the top of the canopy.

[Old School]

Yeah nice. Looks to be a perfect height as well for the bug catcher to clear the top of the canopy.

There is actually a piece about 1 cm high that goes between the supercharger and the bugcatcher so will raise it a further 1 cm. I had to watch the video to make out what goes where. The metal servo as supplied is simply to strip for the electric motor and control board.

[Old School]

For those with a bit more building experience than I do, when I mount my stuffing tube through the hull I intend bonding the next telescopic size larger diameter tube in the hull passing the stuffing tubing through this and sealing it. Should I resin bond the fixed section of tubing to the stuffing tube or use an RTV sealant, please? Using RTV should allow non-destructive disassembly should the stuffing tube ever need removing. My experience is with stingers and this is my first strut install.


Edit: found this image

https://forums.offshoreelectrics.com...chmentid=87104

[Old School]

I do not know how people build small boats as even with this hull I am quickly running out of room. It is like the proverbial 10lb shyte in a 5lb bag. Just mocking up the interior.

[rol243]

I think you better check to make sure this hull still floats with that monster lipo inside. that is a small hydro.

[Old School]

I did a float test previously using two 3300 mah 3s batteries before deciding to go with a single 5s 4000 mah battery.

[rol243]

just looking at the actual size of this drag hydro makes me think the power your going to use in this hull will be too much . the beam is quite narrow and having this more than ample power plus no doubt a pitchy prop theres a good chance this hull will roll over just from prop / power torque. I hope i am wrong in my thinkings but she will be touchy on the trigger.

[Old School]

More POWER, as Jeremy Clarkson likes to say. On a serious side, the motor is most likely a little over the top, but is what I had available. If too much I can go to a 3660. I was actually quite surprised when I saw the hull floating with the two 3s batteries as it seemed rather heavy. However, it did float very well.

I do not intend an aggressive prop initially. My son can work on that as the hull shows if it has promise or not. All the setup can be re-used on a bigger hull if needed. At present the hull is 590 mm X 220 mm.

[rol243]

with our p rigger 4s hydros which have approx 540mm sponson span , these can flip a sponson if you hit the throttle to hard , this is what makes me think with your hydro hull with a 220mm beam is going to be very hairy unless you open the throttle gradually and not wot at once, so if your wanting a standing start as in drag race , you will lose alot of time with a slow start. a rolling start will be fine though.

[rol243]

Drag Boat City . com , has your hydro hull set up and has done 124 mph. take note of strut angle etc plus motor / strut offset.

[Old School]

Many thanks. I have planned a 6 mm offset.