Fixing the BJ26 Handling Issues

[PropNutt43]

This is a copy and paste from another thread I posted in. It gives some general info on drive hardware.

Quote:
Originally Posted by lyndon915
I have been all through the handling issues thread. I have seen the fuller hardware and am just wondering what some of my other options are and what I am going to gain by running an inline rudder or an offset.


Inline hardware:
Will give you almost equal turning both right and left, I say almost because the torque from the motor and rotation of the prop are factors too. Will also lose a little speed because the rudder is in the path of the props thrust.


Offset hardware:
Will give you superior turning in one direction, the direction depends on which side the rudder is on. Should run faster because there is nothing in the path of the props thrust.


Other considerations:
The distance between the rear of the transom and the prop will affect the boats speed and stability and how easy it blows over backwards.

The farther back the prop the more stable and less likely the boat will blow over because the prop has more leverage to keep it from happening.

The closer to the transom the prop is the more speed you should be able to get because the boat will easily get more airborne, but might blow over easier.

If that doesn't help keep looking at the different threads in these forums they will help you make your decision.

http://forums.offshoreelectrics.com/...ead.php?t=3643

[chirotray]

Thank you for the info, most helpful. It kinda sounds like a ford vs. chevy issue.

[wafel1978]

Need advice, please!!!!!

Hi Guys !!!


I am building Dumas “Tuna Clipper” (Wooden Boat). I am going to install [Pro Boat----Blackjacks 26 Brushless] Electronics and Brushless motor to her .

I am seeing mods you guys did and I am absolutely impressed.


1. Wondering if the Fuller’s off shore Hardware will be right (good) for this kind of boat ?

Length of boat 37 inch
Wide 8 inch

Maybe you can folks recommend some, I want this boat to be fast .
Waiting for advices.





Thank you for reading
Greeting Pawel

[RCprince]

You may need to make your own thread, you sorta hi jacked this one.

[chirotray]

Just as a quick pointer even though this boat is way off topic, the hardware and electronics here in this thread couldnt be any more wrong for that boat. Something like that go with a 12 volt system so you can have power and ballast taken care of in one shot. Thats always worked well for me on more "scale" projects. But like RCprince said, if you want peoples full attention to help you, start a thread of your own in an appropriate column so that the right people will see it. Back to the BLACKJACK!

[po-boyz]

The stock controller is suppose to take 24 V. I have 2, 3 cell Li-Pos. 4000 mah each.
Nothing has cooked. Boat neeeeds, I mean neeeeeds rudder to control it.

[wafel1978]

Dumas Tuna Clipeer

ok.

I start new thread, if any one of Blackjacks expert want to post some reply please go to

http://forums.offshoreelectrics.com/...ead.php?t=4010


Sorry about posting in Blackjaks thread.

[chirotray]

The stock controller is suppose to take 24 V. I have 2, 3 cell Li-Pos. 4000 mah each.
Nothing has cooked. Boat neeeeds, I mean neeeeeds rudder to control it.

Im not sure if you meant this to be in response to what i told the gentleman about a 12 volt system, but if it was, i meant a 12 volt as in larger gel cell type battery that is very heavy to provide ballast and tons of run time for a scale type boat.

[MAXAMUS]

Hi all

so the saga continues still no darn boat been 3 weeks or more looks like there is an import / distribution problem to the UK but on the brighter side i have now wrangled a deal with a lhs in Florida who had 3 in stock and as we speak is processing my order after a lengthy phone call and is shipping out this Monday 30.6.08 tomorrow i will be phoning my lhs here to get a refund and tell him the good or bad news however he looks at it lol.

I have all the extras in fact i am all ready to go I've 2x 20c 6000 mah lipo's ,antenna mod /mount, a balanced/sharpened x642 octura prop the programming card a 2.4 GHz Rx and TX well this pending a fatal crash of my RC plane lol but can't say when that will be, also awaiting fullers hardware so as you can see there is only one thing missing yep something to put it all in

when you guy's use hatch tape do you seal the hatch all the way around ? or just a few strips to secure the hatch? is the tape mainly for hatch security or when sealed all the way around for anti water penetration ?

also i am wondering if anyone polishes the hull or applies anything to help the boat cut through the water and reduce drag ?? just a thought

[chirotray]

I use hatch tape anywhere water can penetrate, dry is good. And lightly scuff the bottom of the hull.

[MAXAMUS]

why what does lightly scuffing the hull do i thought it would need to be smooth as??

[chirotray]

Scuffing helps the boat to break the waters surface tension better. Basically lets microbubbles up under the contacting portion of the hull to make it scoot faster. I know its opposite of what you might think, but its proven. Theres a few threads on here that really explain it.

[MAXAMUS]

i see and what would you recommend doing it with a scouring pad lightly from nose to tail ??

[chirotray]

some guys use like 600 grit, i just picked up the first piece of sandpaper that was in my drawer and went to town. It doesnt take much, and I only did the parts that I felt like would be in the water the most. (back 3/4 or so)

[spinner]

Well I tried my Blackjack with the fins angled inwards, with stock hardware. It definately does not help. The boat hooked real bad coming out of corners and lost some straight line speed.
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