Whiplash Sport 40 Build

[Brushless55]

I consider backlash quite a whelm to construct. the results was well worth the time. I drove this boat thru 3-4 inch chops, its was like "anytime anyday i can handle it" with a minor strut setting of course.
I did the built in a 3 room apartment and i hope this inspires you to bulid one too.

[ATTACH=CONFIG]82259[/ATTACH] [ATTACH=CONFIG]82260[/ATTACH]

I would love to see one of those in Brushless!

[jcald2000]

Howard Tucker has a 2220 NUE in the gas whip = Rocket!!!

[detox]

I placed all hardware in boat, and moved everything around until i got CG close to turnfin. I decided not to remove front bulkhead because CG would have been too far forward. Especially after adding lead to front lefthand sponson.

[oscarel]

You've got the motor further back than I do. I'll have to check where mine balances when I get home, if I remember correctly I'm about 1" behind the turn fin. According to Blazer the whip isn't too sensitive to COG placement. I didn't add any extra weight to the left sponson and I don't have any issues turning at full speed.

[detox]

During hard accelleration my Neu Powered Whiplash 20 would lift the left sponson causing it to blowover. So adding lead to left sponson is just added insurance to prevent blowover and to help with COG.

[detox]

The ML Boatworks Whiplash 20 Cowl also fits the Whip 40. I heated cowl with blowdryer to get perfect flat fit.

[oscarel]

I have an Insane30 that hops in turns and I think the left sponson weight is the issue there. I'm going to add a little weight to see if I can calm it down some. But the 40 stays flat and flies through turns. Bad thing with the 40 is the only way to add weight after it's built is on top or side with stick on weights. Here's an idea, small fuel bag with a tube into the center section that you could put maybe sand or water in to add weight?????

[oscarel]

The ML Boatworks Whiplash 20 Cowl also fits the Whip 40. I heated cowl with blowdryer to get perfect flat fit.

I have one as well, but where I have my motor placed I didn't have enough clearance. Are you fabing your own motor mount?

[detox]

The motor mount is what I am working on now. Motor angle is 13 degrees and plate is mounted 10 3/4" from back edge of stern

[jcald2000]

The other soultion to lifting the left sponson might be adding .25 degrees to the Right sponson.

[battlefury]

IMO, i do not think any weight is needed to add on the sponsons. I dont recall the instructions sheet mentioned about adding weight or whatsoever. having said my whiplash is senstive to strut settings but forgiving to CG adjustments in relation to different props tested. As long as the strut settings to be about 0.75"-1" below the deck and not more than 2 degrees angle the boat will ripped the pond!

[battlefury]

i like to run them loose btw. I think it will ease amp drawn for e electronics

[detox]

i like to run them loose btw. I think it will ease amp drawn for e electronics

Of course it will.

Not much done. Using 1/32" plywood I sealed off rear compartment to keep electrics dry and better floatation. I am building this hull as lightweight as possible, but weight will be added to sponson...especially lefthand side.

[detox]

I am using the Owens Corning 3/4" Pink foam board for floatation. I cut all pieces using utility knife then shaped using 80grit sandpaper.

[detox]

For rough balance 2" behind rear sponsons I epoxied 5.7 ozs lead to lefthand sponson tip and 4.56 ozs lead to righthand sponson tip.