Fixing the BJ26 Handling Issues

[jaybirdtke]

Yes, I used some 1/8 inch (3mm) silicone fuel tubing. It works great keeps the water out completely. only want about 1/8 " to rub against flex shaft and make sure a little grease gets in it to reduce friction.

[ATTACH]4625[/ATTACH]

I am still getting an unacceptable amount of water through the stuffing box tube after upgrading to the Fullers Hardware/ Octura 642 prop/ and (2) 2s 4800mAh lipos. I tried making a clear plastic shroud that covered the flex coupler area like a roof from battery box to battery box and from the motor to the electronics tray. This confirmed that the water is coming from the stuffing box tube.
Is 1/8 inch (3mm) standard size fuel tubing? I tried a piece of fuel tubing similar to what comes with the boat for the cooling system and it just tore. Would you recommend adding some CA to where the plastic stuffing box tube exits the copper stuffing box tube on the inside and or outside of the boat or anywhere else? Any other recommendations are appreciated.

[PropNutt43]

Is 1/8 inch (3mm) standard size fuel tubing? I tried a piece of fuel tubing similar to what comes with the boat for the cooling system and it just tore. Would you recommend adding some CA to where the plastic stuffing box tube exits the copper stuffing box tube on the inside and or outside of the boat or anywhere else? Any other recommendations are appreciated.

The stuff I used is made by Great Planes it's 1/8 inch (3mm) inside diameter. This is their large silicone fuel tubing for glow fuel.
It will fit without tearing if you take a pair of needle nose pliers insert into one end and stretch it out a little first. Then use a little grease and work it on to the plastic liner and then over the brass tube. It will be tight but that’s how I got it to fit.

As far as using CA on the liner, I wouldn't recommend it. At some point you will need to remove it for replacement when it wears out. Using grease and the fuel tube will completely eliminate any water from getting in through the stuffing box tube. It has on my boat.

[Eyekandyboats]

the main problem is the hull. Not all the band aid solutions.

[Wakesurfer]

I've got a Skater II and a new prop ordered. I contacted TLR about ordering a spare strut for the Skater so I can try to mod it with a brass bushing. Wife's cousin has an automotive machine shop (almost all custom race motor builds) so I'll see if they can help me with the mod. I'm not sure, but I think TLR wants to send me a strut instead of me buying one. I call that good tech support and customer service. I don't know if anyone has already tried this, but I'll try to post the results of the mod. If it's been done and tanks, let me know please.

[MORIDE]

Turn fins

Do you think in stock BJ (has flex cable and X642) that the angling of the turns fins will have a significant effect on handling or/and speed? Also, PropNutt43, where do you run in OFallon? I am there also.

[Apples1]

I will let you know after sunday running, i am running stock setup with 642 and turned in fins!

[MORIDE]

I will be running this weekend also, last Sunday ran it in way to rough water and completely flipped (MUST remember to take the time to completely tape the hatch) it was floating with just a couple of inches of the front out of the water, completely under almost. I thought I was in for some replacement electrics, but let it dry out overnight and all is working fine. I will NEVER run without the hatch taped again! It happens so fast!

[PropNutt43]

Do you think in stock BJ (has flex cable and X642) that the angling of the turns fins will have a significant effect on handling or/and speed? Also, PropNutt43, where do you run in OFallon? I am there also.

Sorry I don't know how it will run with the stock drive and the turn fins angled. I never ran mine that way. I didn't angle the fins till after putting the Fullers Cat Hardware on.

I'm interested in hearing how it works out. Would think it should improve the handling but won't eliminate all the problems.

I'll PM you as to where I run my boat. Just want to keep this tread on subject.

[Apples1]

RUBBISH,

Absolute rubbish....... The thing wouldnt run in a staight line, and round a corner the BJ26 "crabbed" and when you powered around a corner it would lift a sponson in both directions, it just ran like a dog...

After a rather embarrising display at my new "nitro" boat club, i re straighted the fins and had a decent crack , after the laughter from the nitro boys died down, there was general shock on their faces, when lap after lap about 10 or so i was passing some of the bigger gas and nitro boats

Another win for the Electric boys.....

[MORIDE]

So are you saying that angling the fins on a stock drive setup is not a good way to go and the straight fins (factory setting) are superior?

[Apples1]

thats it Moride, in my opinion..

[TRUNKMUNKY]

Here's mine with no turn fins,speedmaster hardware,ammo2300,150 flex,and hull mod I can now turn at full speed most of the time..http://www.youtube.com/watch?v=pT2UKoTILJY forgot to mention this boat also has a sv27 esc and 2 little zippy k 4300 7.4 lipo packs,and runs very cool.Will tweak the hull some to smooth out the handling even more,and should be getting a bit longer rudder to help...the 5.25 really works super on my mean machine compared to the smaller speedmaster and will most certainly help this boat after some trimming.

[Joe007]

Propnut, you used the stock stuffing tube, why not make one a bit longer so that more of the flex shaft is more stable? Just wondering I have followed your build up to a tee except I have make my own stuffing tube and make it about 1/2 inch longer toward the rudder... Will this have any effect on running it that way?
Joe007

[PropNutt43]

I thought about making a new stuffing tube to run all the way to the strut to help keep water from getting into the boat. I decided against it when the problem went away after adding some silicone fuel line as a seal at the motor end of the stuffing tube.

Besides, I like the flexibility of the Teflon tube when it comes to adjusting the height and angle of the strut.

I don't see any problem with extending the stuffing tube another 1/2 inch, shouldn't effect performance but you won't know for sure till you run it.

[PropNutt43]

Here's mine with no turn fins,speedmaster hardware,ammo2300,150 flex,and hull mod I can now turn at full speed most of the time..http://www.youtube.com/watch?v=pT2UKoTILJY forgot to mention this boat also has a sv27 esc and 2 little zippy k 4300 7.4 lipo packs,and runs very cool.Will tweak the hull some to smooth out the handling even more,and should be getting a bit longer rudder to help...the 5.25 really works super on my mean machine compared to the smaller speedmaster and will most certainly help this boat after some trimming.

TRUNKMUNKY,

Would like to know what hull mods you have made, how to do them, pictures if possible. Your boat definitely turns great! Awesome video too! Please enlighten us.

Also, are these the batteries you are running? And is this where you got them?

http://www.hobbycity.com/hobbycity/s...idProduct=6656

Been dying to get some lipos and these look very affordable. The weight loss has got to help the handling.