BJ29 Pilots, what is your setup to avoid the bouncing?

[CHIEFY_44]

I didn't add weight at all, and yes I mean the 2 part foam from ose, and I mean fill sponsons with it so that the foam finishes 2inches from the hatch opening or so you can get at the water outlet if you move that, basically I covered the Styrofoam that is in there already. I have also tucked the rudder blade towards the hull doing this seems to pull the front down, you could try that.

[scrillamil]

I was wondering same thing😉 Chiefy boat runs great that's exactly what I'm hoping for just want to reduce the hopping on mine.

[dre414]

Thanks again Chiefy. I looked around, i guess 2part polyurethane closed cell light density is what I should be looking for. Looks like scary stuff to work with but what's the worst that can happen right? I think I'll move the battery trays, try the rudder and mess with weight distribution a little more before I play with the foamy stuff.

I'll keep you all posted.

[lenny]

Good to see it is running smooth for you now.
So how did you go about getting the rudder to tuck in ?
And also what size cells are you running in the video ?


I think when you added the foam to the sponsons that also added some dead weight to the bow.

I didn't add weight at all, and yes I mean the 2 part foam from ose, and I mean fill sponsons with it so that the foam finishes 2inches from the hatch opening or so you can get at the water outlet if you move that, basically I covered the Styrofoam that is in there already. I have also tucked the rudder blade towards the hull doing this seems to pull the front down, you could try that.

[CHIEFY_44]

This is the setup in that video.
T-180
Leo 4074
M445 prop
4s2p 4000 maho
Strut level with sponsons and no angle
Rudder tuck in towards rear of hull.
Ok Lenny how I tucked the rudder was I replace the bottom bolt in the blade with a smaller one, actually its a plastic/nylon shear bolt now and when I did this it allowed the blabe to be tucked in towards the hull, why doing this helps I don't know why, but it does.

[lenny]

Hey,

Thanks for the info on the rudder.

The rudder most be a better setup than the Mystic rudder now,

With the new brake away bolt.

Could someone post some good pictures of the transom and all the hardware please,

I did a search for pictures, But nothing any good showed up.

[AlanD]

Olwarbirds, how did you add on to the battery trays? It sounds like you have the same Thunder Power 5000mah/65C/3S packs I'm using. My new BJ29 is 100% stock but my first run showed some minor signs of bouncing when I gave about 80% throttle. I'm curious what your mods look like. If you can share some photos, that'd be great.

For what its worth my sponsons are 100% flat and dont need any blueprinting. With Dre's pointers, I placed the battery packs 50% hanging over the front edge of the tray with the leading edges of the batteries on the hull center.

[olwarbirds]

Alan, I just bought a new digicam today :) ... we will be posting pics and more vids very soon... We are no longer running the stock setup.. We are now running the leopard 4082 2000kv with the 180amp esc and upgraded flexshaft all from OSE...I from now on will be using Dinogy lipos..for the price YOU cant beat the quality or the warranty ! ..... we just moved are battery trays forward ...the new setup is stupid fast... DJ

[Barrel Roll Joe]

IMG_0614.jpgIMG_0818.jpgIMG_0824.jpgIMG_0822.jpg

Not sure if these will help. I was able to tuck my rudder as much as it would go without having the pushrod touch the bracket. Just loosened stock bolts adjusted rudder then tightened, seems secure.

[lenny]

Thank you.
How is yours running for you ?
And is that stock setup in it ?

[Barrel Roll Joe]

Runs good, only have ran it four times so far and its pretty much stock except for the prop and shaft. trying to work out the bounce as well. gonna try and make this boat a monster and by the looks of the videos im gonna need to do my homework when it comes to choosing the right motor. 4074 or 4082 seems to be the question?

[olwarbirds]

leopard 4082 1800-2000kv for 6s...2000-2200kv for 4s....we did not have to tuck the rudder to take out the bounce...are BJ29 runs extremely smooth...(no bounce) with the 2 3s lipos moved forward...

[lenny]

Hi,
Where is the boat strut set at ?
And do you have any pictures of the setup with cells in place for no bounce ?
Also any video's of it running ?

[olwarbirds]

Hi,
Where is the boat strut set at ?
And do you have any pictures of the setup with cells in place for no bounce ?
Also any video's of it running ?

Hi Lenny.... strut is even with the transom no pitch....lipos (2 3S) back of batteries are even with motor mount, so they are way forward of stock mounting position...sorry no pics yet..got new digicam but with workn two jobs NO TIME to play...in both vids the BJ29 is still being run on the stock motor and esc, using 2 3S 40C lipos....we are now running a leopard 4082 2000kv 180amp seaking with cap bank and 2 3S 65C lipos...I will try to get new vids soon .... DJ

http://www.youtube.com/watch?v=6A7MWH_l_aE

http://www.youtube.com/watch?v=RZQmYMmJ3Sc

[Barrel Roll Joe]

hey warbird...you have that leopard wired with 5.5 bullets? if so is it wired exactly like the stock setup? about to order that esc motor combo you have just wondering if i should replace connectors with bullets.

Hi Lenny.... strut is even with the transom no pitch....lipos (2 3S) back of batteries are even with motor mount, so they are way forward of stock mounting position...sorry no pics yet..got new digicam but with workn two jobs NO TIME to play...in both vids the BJ29 is still being run on the stock motor and esc, using 2 3S 40C lipos....we are now running a leopard 4082 2000kv 180amp seaking with cap bank and 2 3S 65C lipos...I will try to get new vids soon .... DJ

http://www.youtube.com/watch?v=6A7MWH_l_aE

http://www.youtube.com/watch?v=RZQmYMmJ3Sc