Whiplash Sport 40 Build

[detox]

I glued the doubler bulkheads together and laid out the main parts. Do you tack it up first including all the sponson framing or can you glue the bottom on with out tacking up all the sponson pieces?

I may take some pics or start my own thread soon.

Did you buy your Speedmaster strut from OSE or direct Rossisales? 1/4" drive or 3/16"? I figure 1/4".

I bought directly from Rossisales and i use a 3/16" drive.

[oscarel]

link dead, maybe he's having a sale like many others?

Not sure what was wrong, I redid and it works now.It's the link from the sport40 page at the bottom.

[ray schrauwen]

Got it tacked up on the board and the bottom is cut, laid in place, clamped at front, weight on rest. I'm adding 1/8th strips then tacking it down today.

Is it o.k. if I epoxy the inside before tacking up the sponson pieces?

Step #8 is confusing since my parts are not numbered I don't understand what is frame #8 ??

Here: Step #8:. Tack the #8 frame, as shown in figure 4 (previous page). The tip of the frame
will taper in towards the inner sponson, while the vertical edge is in line with the outer
edge of frame #7. (If the frame bows in towards the inner sponson, temporarily place a
wedge to push the frame out)

I'm not there yet but, I'm a tad confused. If I had the numbers of the pieces I would be o.k. I think....

[oscarel]

See shooter's #6 and 7.
http://forums.offshoreelectrics.com/...ash-40-Q-Sport

[ray schrauwen]

Thank you, I get it now, just like my 21.

[ray schrauwen]

So may I ask what timing you used for the motor and what MAH batts did you settle on so far? Thanks for all the help. I'll start a new thread soon of my own.

[detox]

I "think" i used standard timing with the Neu 1527 1y motor and two Neu 3s 8300mah packs. Prop is a Octura X455 with some tongue removed. The x series props have less slippage, jump on plain and drive thru turns faster. Add a little cup for faster speeds.

[ray schrauwen]

How much weight have you added and where?

Bottom all done & sponsons done. Just epoxied the inside of one sponson with some chopped glass an some pieces of carbon Kevlar cloth. I'm jamming epoxy & chopped glass into the tips and nooks and crannies.

[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.

Although hull is very stable, sometimes I think i added too much weight to tips. The next build will be a little lighter.

I bet my hull (or prop) is faster than Shooter's

Just kidding, but it would be fun to see.

[Shooter]

Are those bullets??? lol. Stay out of this guys way!!!

Ray, I forgot.....I did add weight to the front via epoxy. Both tips are filled, but that's it.

[detox]

I like casting my own bullets also. Those are RCBS 500 grain 45/70 bullets that I shoot in my Browning 1885 BPCR High Wall.

http://castboolits.gunloads.com/

...

[ray schrauwen]

I have epoxied the inside of the right sponson. I added chopped glass jammed into the sponson tips and other areas to make fillets. I'll do the left sponson tonight then I can skin the top.

I used a 1/4" thick piece of aluminum for turn fin backer like you guys did, also adding 1/4" aluminum to inside of right tub side so I can bolt the turn fin to something for adjustment as this kit was not close to 100% straight.

I'll toss up some pics later hopefully. Looks kinda messy but, it's going to be strong. The only weight I'll add is epoxy plus chopped glass and the same weight of aluminum to the left side to offset what I added for the turn fin.

Thinking Dinogy 6S 4000Mah x2... Hobby King is out of a popular Aspec Nano 4500Mah 65C 3S packs, they are the boat specific ones.

[detox]

Why not two 8300mah 3s packs or 6s1p. IMO 3s is less troublesome, easier to balance because of less cells and weigh less.

http://www.neumotors.com/Site/Battery_Specs.html

QUESTION ... Will 8300mah be enough capacity for a six lap heat race? I have never tried it.

[oscarel]

Should be plenty, guys here are running with 6600 packs.

Sent from my SAMSUNG-SGH-I747 using Tapatalk

[ray schrauwen]

I know you use Neu packs and they must work or else you wouldn't use them but, 35C?? it seems so low that I could just buy a $88 HK Zippy 8000MAh 30C pack and make do. I know, apples and oranges....

http://hobbyking.com/hobbyking/store...dproduct=16225

Why not two 8300mah 3s packs or 6s1p. IMO 3s is less troublesome, easier to balance because of less cells and weigh less.

http://www.neumotors.com/Site/Battery_Specs.html

QUESTION ... Will 8300mah be enough capacity for a six lap heat race? I have never tried it.