Tech. Question

[planezero]

The 3rd channel is used to ignite the Estes rocket engine when you are in the home stretch.

I found that hilarious !
I'm not sure that would be legal in any boat class, but well worth the try!

[alvinsmith75]

Grim great job!!!
Being this is a tech. question thread, How do I stop the teflon liner from spinning with the flexcable? Have you seen this before or is it normal?
Thanks in advance,
Alvin

[Fluid]

The teflon tube should not spin within the brass stuffing tube. In my experience (not with the SV) if the cable is properly lubed the teflon won't spin, but I know that it happens. What some do is to extend the teflon liner about 1/4" into the boat and stretch a short length of silicon fuel tubing over both the teflon and the brass stuffing tube. This provides enough grip to keep the teflon in place.

There are probably other options too, but this is one reason I usually recommend not using the teflon, just running the cable in a brass tube (the next size smaller than the main stuffing tube). Ive been doing this in all my own boats for over a decade and have never worn out the brass tube with either wire or flex cable - but I do use good lubes and remove my driveline after every day of use.

However, for a consumer product the teflon liner makes perfect sense. I'll probably keep the teflon liner in my UL-1 unless it becomes a problem.


.

[ZarkSniper]

First off...really great looking boat

ok, newbie question

Of the 3 available optional props...which one is best? Or more to point, what are the differences?

Thanks

[Grimracer]

Alvin,

I doubt the teflon is spinning with the boat underway.. You will see the Teflon scoot up to the coupler but that does not mean its spinning..

One thing I have done on my race boats is cut a length of brass tube (in this case 7/32") about 3/8" long. Cut the liner short enough to allow the new length of brass to slip in. Slip it in from the coupler side and tack solder in place.

Having said this...

Teflon is VERY hard to extrude as a tube. We have seen and have had teflon "out of spec" regarding fit into the brass tube. It also shrinks and swells ALLOT regarding temperatures.

More info then most of us EVER NEED.. Sorry


Zark,

The three blade 40X52 is going to provide the least amount of lift, be easy to launch and a great all around prop
The 38mm prop is a great heat racing prop. Just the right amount of lift and great handing in race water. (not the fastest.. again,.. Heat racing prop)
The new cleaver 3 blade is very FAST.. its going to stress your batteries to the limit. If you want to rock the house this is the prop. You better know your setups before using this prop to any extent.

ROCK ON ALL!

Grimracer

[Grimracer]

Jay.. Thanks for all your help on the board.. With all my design and development time on the bench I do not always get the chance to help out around here.

Guys.. please.. when Jay posts take the time to read and comprehend.. He has tons of time RC boating and is a very valuable asset to us all.

Thanks again Jay!

Grimracer

[Rusty Jarrett]

Radio change

I have a new UL1 and would like to swap out the radio system so I can use my 3PK which has the Spektrum module.
Will the stock ESC accept this change if I replace the stock reciever with an SR3000?

Thanks

Rusty Jarrett

[JimClark]

should work just fine

[Rusty Jarrett]

Spektrum

Thanks Jim,

I just made the swap and the ESC beeps once when I plug in the second battery, but it is not powering the reciever, so I cannot bind it. Any Suggestions?

[JimClark]

reciever battery?

[Rusty Jarrett]

Got in a hurry, and did not put a battery in the system. All of my electric cars run BEC, only my nitro cars have a battery.

Sorry to waste your time.

[JimClark]

not a wast of time at all

[Rusty Jarrett]

Bec

It is a BEC system. Has anyone changed a UL1 to Spektrum?
Any help is very much appreciated.

[skibo2]

Rusty, set your throttle trim at 0 (dead center) and then advance or retard the throttle trim until the system binds.

[AndyKunz]

I think what he means is, get your throttle in the right position, THEN bind.

The reason is that if you lose signal the receiver puts the throttle in the state it had when you did the bind. If the ESC is not off, the motor will continue to run.

Do yourself a favor and test this by

1) Bind with the throttle in the right position
2) Power down both RX and TX.
3) Remove the binding plug (or release the bind button).
4) Power up the tx, then the rx. Wait until they connect.
5) Test the throttle operation. If it works properly, then while the motor is running
6) Turn off the tx.

The motor should shut down. If it doesn't, you need to trim your throttle down and rebind.

Andy