Jae mini sprint carbon fiber wrap????

[martin]

Hi Eric its def a Mini Sprint 17" long, ive modded the top 2 times so as to get more room inside for various set ups. Yes i prefer the flat tops rather than the cowl tops. Their easier & more secure to tape down + i prefer see through tops so as to see whats happening inside ecspecialy to see if any water has got in.

[eric_laermans]

Okay, on photo it looked larger to me. My 17'' mini-rigger has a 2221-8 Hyperion weighing less than 80gr combined with an ETTI 45A ESC and 2600mAh 2s LiPo and 36mm steelprop. I would pick the Leopard 2845-4420kV (125gr) from your list on 3s with 32mm (1.4 pitch) prop. That should give her a topspeed of approx 60MPH. Using the 1732 prop might work/ might not work and propel her to 75MPH which is probably too much...

[martin]

http://www.youtube.com/watch?v=nOUlQEGC8lg

Eric this is my Mini Sprint before i modded the top & also added 6mm boom tubes as the 3/16" tubes were not strong enough. Motor was a cheapo $12 Mystery 2636-3800kv outrunner on 3s 60c 2200mah with 60amp esc & Octura x435 detongued & back cut. Should be much faster now with the Leopard inrunners though.

[eric_laermans]

That's ballistic! Almost SAW speed with oval-handling. I never tried these kind of setups as I also run competitions in which during 5 minutes we need to do ovals. Do you consider the ridepad valuable in gaining speed? Rgrdz Eric

[martin]

Bearing in mind this has a cheapo motor, if the turn fin was either removed or a much smaller one was fitted for SAW runs only i think the straight line speed would increase a fair bit faster but with no turns only low speed turns at best. Re the rear ride pad im not sure whether that creates drag as you seem to get a fair bit of spray coming off of it but it does have other benifits that probably out weigh a slight drag effect though. Cant wait to run it with a 800w & 1000w motor though.

[brett657]

Yes... you can use carbon tape on the rear of the tub to strengthen the wood You might want to put a couple of layers of carbon on to get a bit more thickness to it or you can stick a piece of carbon sheet on the rear.where this is intended as painting on the wood. Go steady with how much carbon you use in other areas though as you are making the boat heavier which will affect performance if you go to heavy and very Nice pics Thanks martin...

Regards
brett
Nitrotek

[Meniscus]

Maybe not for this build, but you guys may be interested in this article for the future: http://www.modelgasboats.com/Composi..._construction/

[Gary Mullens]

http://www.youtube.com/watch?v=nOUlQEGC8lg
Eric this is my Mini Sprint before i modded the top & also added 6mm boom tubes as the 3/16" tubes were not strong enough. Motor was a cheapo $12 Mystery 2636-3800kv outrunner on 3s 60c 2200mah with 60amp esc & Octura x435 detongued & back cut. Should be much faster now with the Leopard inrunners though.

Martin, Care to share how much more in height you added to the build? Also, what is the brass mod you did on the 6mm tubes?

Thanks,
-Gary

[martin]

Hi Gary i added 5/8" in height but slightly less at the front & rear as i wanted a curved top to give a bit of shape rather than a flat top. Martin.

[martin]

I also upgraded the carbon boom tubes as the stock 3/16" were not strong enough for what i wanted, here in the UK we cant get imperial diameter carbon only metric. So went with 6mm diam carbon, obviously had to change the brass tube in the sponsons & in the tub to larger brass to take the 6mm carbon boom tubes. I also had to make new sponsons due to destroying them in a crash so made the sponsons a tad higher on the top so as to get more material above where the tubes go into the sponson as i also add hard wood blocks inside the sponson to strengthen where the tubes are bonded in. Martin.

[Gary Mullens]

Martin, What are the little clamps that hold the boom to the tube and where can I get some?
Thanks,
-Gary

[martin]

I made the collars, their are various collars around for doing this same job on riggers. Dont know of their sizing though as ive never had to buy any.

[Gary Mullens]

Martin, What is the length from the transom to the back side of the rudder? Also, Are you using the right angle piece and the aluminum that is mounted on the side for a rudder mount? How thick and what is the length of the aluminum piece that is mounted on the side?

Thanks,
-Gary

[martin]

From the transome to the rear of the rudder is 2.75", i also dont use the stock wooden bracket as on the kit i use the full aluminium bracket that the rudder comes with. You do need to cut the piece of angle on the rudder a bit shorter otherwise the rudder is to far off the transome. The flat plate i use is 1/16" thick x 7/8" wide & 2.75" long with the front of the plate bevelled 45 degrees. To sum up the rudder is bolted through the rear of the transome with the mounting angle & also through the side with the flat plate.

[Gary Mullens]

From the transome to the rear of the rudder is 2.75", i also dont use the stock wooden bracket as on the kit i use the full aluminium bracket that the rudder comes with. You do need to cut the piece of angle on the rudder a bit shorter otherwise the rudder is to far off the transome. The flat plate i use is 1/16" thick x 7/8" wide & 2.75" long with the front of the plate bevelled 45 degrees. To sum up the rudder is bolted through the rear of the transome with the mounting angle & also through the side with the flat plate.

Thanks Martin. Looks like in the pic's you posted that their may be a piece of ply added on the outside of the tum where the 1/16 aluminum piece is mounted. Is this the the standard with the kit or something you added as well?