Whiplash Sport 20 Build

[jcald2000]

But you are NOT going to see it easily on the water!

[lenny]

Its going to look pretty mean in black and maybe rainbow chrome for windshield.
Pretty stallion.

[detox]

Ridepad height exactly .750" .......... think I will paint this hull black.

[detox]

Deck has been glued down. Holes are drilled to inject epoxy for better reinforcement.

[detox]

Much like the ride pads. I widened and raised the recovery pads .250".

[detox]

Boat is exactly 34" so rear of sponsons had to be extended .125" to be legal with .60% afterplane rule. I traced rear of sponsons onto 1/8" plywood then cut out using bandsaw. A cheap hand scroll saw will also work.

Raising and widening sponsons helps heavier hulls get on plane much easier (thanks to Raptor347). I widened and raised ridepads .250" using basswood. Plywood can also be used.

You can see in picture how stearn tapers. Epoxy will be injected into this area to stiffen.

[lenny]

Hey Kieth,
You are getting really good at those mods on them.
Can not what to see this one run.

[detox]

My next Q Hydro Whiplash is 1.5" wider and 4" longer than stock. Totalling 34" long

[detox]

No...thats 1638mah used per 4200mah pack. OR like I originally said "I am using two 4200mah packs totaling 8400mah. Total mah used during that run was 3276mah"

[jcald2000]

At 230 amps ave. in 1 min., I assume that means 3276 used from EACH 4200?
Those .05 turns shore do eat.
If thats the case it won't make a heat race.

[detox]

Thanks Guys. You can tell by the way it sounds or screams motor is turning alot of rpm. The amps being pulled (260-200) appear to be running on ragged edge of ESC specs. I hope she lives during the hot summer. I also plan on trying a lower 2030kv motor and larger prop. Some say slowing the prop down makes prop more efficient.

[lenny]

Very very nice Keith,
Looks like she a good runner.

[oscarel]

Looks good. Your average was 230 amps?

[detox]

OH YEA! Here is first video. Boat turns verygood using the Virginia Craftsman Sport 40 fin. Max prop rpm 36000 (logging set at 4 pole 2500kv motor), average amps pulled 230, Motor temp 123, Lipo temp 93, ESC temp 150. Boat is capable of more speed...need more prop

I am using two 4200mah packs totaling 8400mah. Total mah used during that run was 3276mah

I had to add the White nose cone locator pad in picture so my nose cone would stay on and not fall off. This locator pad has the same size and shape as one used on UL-1. This keeps the nose cone from sliding around and breaking free of tape.

http://www.youtube.com/watch?v=whOfCOv9HB0&feature=youtu.be

....

[detox]

Just started my 34" Q Sport Hydro build. Using bandsaw I cut out longer framing (extended 4" @ stern). Two 2 1/2" x 48" strips of 1/8" plywood were laminated together using 3M contact spray adhesive then Four pieces were cut out.