Whiplash Sport 20 Build

[HOTWATER]

Sweet!!

[detox]

The bare hull weighs 4.6 lbs. No hardware installed except motor mount.

[detox]

Look at the differences between these three 8mm x .187 collets.

L to R...Jeff Wohlt 11.15 grams, Octura 33 grams, Kintec 13.80 grams

[lenny]

Your boat looks great just the way it is,
It really came out nice.
I want one now.lol

[detox]

High build urethane primer (Buff color) has been applied and block sanded.

I am using the Zippkits finishing instructions:

Sand the hull. Fill any holes or imperfections with wood filler (microballoons and epoxy). Sand everything with 150. Seal the tub and sponsons with epoxy finishing resin. Be sure that all wood is sealed. Scrape/wipe off as much epoxy as you can. It will make sanding easier. When cured, sand with 150 and recoat with epoxy. This coat will use far less resin than the first. When this cures, wet sand everything with 220. If you are painting, sand the entire boat with 220. Now is the time for primer. Wet sand the primer with 400, and use spot putty to fill any imperfections. Wet sand with 400 and lay on a heavy coat of primer. Wet sand with 600-800 and paint.

I may copy this cool paint scheme. Grim Racer's Yellow Motley Crew development hull.

Hull has been painted using Summitracing's single stage urethane paint (Performance Yellow)

[detox]

I filled the void at taper using epoxy. When epoxy cured I used wood flour and epoxy as filler. Then sanded smooth

I have been using RAKA brand epoxy (350 hardener, 167 resin). Its lots stronger and less brittle than the Z Poxy finishing resin, but takes lots longer to cure. A little cheaper than the Mas brand epoxy also.

[detox]

Ridepads widened 1/8" and built up 1/16". Total height and AOA has not been decided yet. I will test different pad heights/angles by temporarily attaching them with 3M spray adhesive. Less AOA than stock may be needed.

[detox]

8s2p anyone? How bout 6s2p? 4s2p?

[detox]

I think I will paint hull Yellow and Black, but first I have to build new ridepads.

[detox]

Before cross piece is screwed down. I used a piece of 1/10" carbon fiber plate to brace inside both sponsons. I will predrill using long 1/8" bit so cross piece will not split

[HydroMike]

Seems bracket is the most difficult part to find when mounting a turnfin. Blazermarine does not carry a bracket for the Sport20 fin. So I used 1/2 of strut bracket from this kit. You can call Rossi sales and he will fix you up without buying whole kit. Just tell him it is for a turnfin bracket.http://rossisales.com/

just what I was thinking to thanks

[detox]

After checking for balance I used 8oz of lead in left sponson and 4 oz in right.

[detox]

What bracket r u using I have his turn in didn't see a bracket for it might have over looked it guess

Seems bracket is the most difficult part to find when mounting a turnfin. Blazermarine does not carry a bracket for the Sport20 fin. So I used 1/2 of strut bracket from this kit. You can call Rossi sales and he will fix you up without buying whole kit. Just tell him it is for a turnfin bracket.http://rossisales.com/

[HydroMike]

What bracket r u using I have his turn in didn't see a bracket for it might have over looked it guess

[detox]

Blazermarine CNC'd Whiplash 20 turnfin installed. This turnfin is on the smaller side, so I installed it deep. Bracket will be drilled again to move fin more forward if need be. Ridepads will be built up and widened later. I am installing all hardware before checking balance.