BJ26 vids and pics lets see what you got !!

[MAXAMUS]

I went to the pond today to do test runs but I ran into two problems.

1. the drive flex shaft came out of the coupler leaving the motor spinning with the coupler.
2. The boat danced from right to left drastically, making a top speed run impossible.

I did however get a half speed run of 34mph before the shaft popped out.
Any thoughts as to why the shaft came out in the first place, and why the boat is bouncing left to right?

make sure the drive shaft is not binding on anything and ensure its as central as possible on the exit from the hull to the motor coupling

is your prop balanced ?

is CofG correct and bats as low as possible in the hull

if not already done cut down and angle in turn fins or remove them all together

[Blackjack-sven]

make sure the drive shaft is not binding on anything and ensure its as central as possible on the exit from the hull to the motor coupling

is your prop balanced ?

is CofG correct and bats as low as possible in the hull

if not already done cut down and angle in turn fins or remove them all together

Drive is not binding
Prop is NOT ballanced
CG is 7.5" from transom
Batteries are in the bottom of each sponson
Fins are angled in and approx 1 cm higher than stock

This is what I was thinking

Cant see the prop being the problem as it would only cause vibration. If the drive was binding the motor would just need to work harder, and I also thread locked the coupler so it wouldn't fall off (this time it worked). Front to back CG would not cause side to side bouncing. Batteries even high up, also would not cause the side to side bouncing. Fins are the only thing I can think of possibly causing lift to the point where the hull completely leaves the water. Too much down angle on the strut causing the boat to come clean out of the water.

This is what I had before running the boat.

CG left to right: Centered
CG front to back: 7.5" from transom
Weight wet: 5.2 LBS
Octura prop: x642
Motor location: 8xl centered
Flex shaft: Not binding
Turn fins: Raised and tilted inwards (angle of lowest sponson)
Batteries: 1 in each sponson as low as possible and all the way to the rear

I wish I had a video to show so you guys could see the effects I was running into, but my explanation is going to have to suffice.

Here are some pics of the boat just after the run. Oh and as you can see, the water was near glass like.
The next time I will go out and place the turn fins back in the stock location and see what happens. If the problem exists after that, I will remove a turn fin or two and see how she goes.

[brad65]

the min c looks cute out there lol

[jaybird]

Try pushing the batterys forward thats alot of power to have all the wieght down the back.

[HappyOne]

Stock motor and esc, Fuller's hardware, lipos.

[Stephavee]

Let me know how i got her trimmed out. I'm still a nube and yes i do plan on upgrading my esc/motor to somthing that will last on 6s! i just dont know what to get. too many to choose from! any help? also thinking of filling in the last step?

Stock motor/esc
nitro ss hardwear
no turnfins
no tupperwear
batts lowerd
6s 2p 5000mAh 35c lipo
E-trex gps
i was running different props this day 40x52, 42x55

http://youtu.be/0niUkIKWYBc

http://youtu.be/30FG-81c35c

[chevyboy67]

Does that strut/rudder bolt into the same holes that the original outdrive bolts into?? I'd like to put that type of drive on it, but I'm gettin my boat custom painted so I don't want to drill any new holes..

Thanks

[Stephavee]

Does that strut/rudder bolt into the same holes that the original outdrive bolts into?? I'd like to put that type of drive on it, but I'm gettin my boat custom painted so I don't want to drill any new holes..

Thanks

No you have to drill new holes....but its worth it!

[chevyboy67]

Hahaha well i talked my self into it and ordered the strut/rudder and an octura x642 prop last night.. wat do you fill your holes with?? I have a fiberglass putty for my real boat.... Would that work ok???

[Stephavee]

Yes it will work but i havent filled mine in yet! I was too excited to put my boat back in the water i just put some sticker dots over the old holes and hot glued the inside...just in case i didnt like the new setup! but now i think i will fill the holes with red Led's to indicate PWR on/off. this winter im also upping the power a bit and going with the Miss geico rudder, its a little longer and the water pickup is lower so it should help keep her planted in the turns and running cooler. check out my youtube videos to get an idea on how this mod works!

"DangerDad828youtube"

[Stephavee]

Some of my winter upgrades if y'all want to see. i got a PB mystic hatch and cut it all to hell to make my own sleek new lid. Motor/esc swap to a Leopard 3674 1700kv motor and seaking 180 esc. new m545 sharpened and balanced prop. new miss geico rudder. mods to come...hull reinforcements/crack and hole filling,paint?P3130399.jpgP3130404.jpgP3130405.jpg

[Stephavee]

dont forget to beef up the transom and add a sheer bolt! i found that out the hard way when i hit a chunk of 2x4 @ 50mph! the boat did a front flip and need some work done after wards! but still going.

Hahaha well i talked my self into it and ordered the strut/rudder and an octura x642 prop last night.. wat do you fill your holes with?? I have a fiberglass putty for my real boat.... Would that work ok???