Wich size flex shaft ???

[Yvan]

Hi all !

I am a new ''poster'' on this site

I've built an hydro ...a ''Grand prix hydro'' and i'm a bit lost.......

It is 19'' long , balsa + fiberglass it is kind of ''heavy''

My first question is what size flexshaft should i use whit this boat... i have .098 now
but i think that it is to small ...?????

Yvan

[LiPo Power]

Thia one:
http://www.offshoreelectrics.com/pro...oct-oc150L-24c

[Yvan]

O.k. !

So .150 flexshaft should be o.k. ?

I guess that my stuffing tube is gonna be to small.......

Yvan

p.s. i will try to insert some pics.....

[Yvan]

Bateau 006.jpgBateau 003.jpgBateau 002.jpg
Bateau 006.jpgBateau 004.jpgBateau 003.jpg

[Yvan]

Lipo Power;

I've checked the link that you post and and i am a bit confused.....i read that teflon is a
''no-no'' inside stuffing tube (more friction) ????????????? right ?

Yvan

[marko500]

Some guys use a teflon liner some do not. All my newer boats do not have the teflon in them. But a couple older ones still do. I personally find the flex shafts turn easier and with less friction in the boats without.

Mark

[Yvan]

Thanks marko500 !

Last year, i run this boat (in the pictures) with a .098 flexshaft with teflon..... but now, i want to run
it with .150 flexshaft and no teflon......

I am very happy that i ''found'' this site with other rc boats ''maniacs'' ) ) )

[LiPo Power]

I am yet to have an issue with teflon...
Using it on all my boats, no problem.... so fare...

Lipo Power;

I've checked the link that you post and and i am a bit confused.....i read that teflon is a
''no-no'' inside stuffing tube (more friction) ????????????? right ?

Yvan

[Yvan]

Hi Lipo Power !

Never had problem either with teflon, but hey, if i can gain some mph, why not !!!!

[marko500]

I've never had a problem with the Teflon either. Just thought the drivelines in my boats without seemed to turn with less drag.

Mark

[Yvan]

Mark;

What size flexshaft do you use +stuffing tube ???? and do you use oil or grease ?

...any water in the hull problem ??? its a lot of questions but this website is
''made'' for this right ? )

Yvan

[marko500]

With my .187 flex I use 1/4 brass tube for the stuffing tube. But when I'm building the driveline I use a piece of 9/32 tube about 2 inches long and epoxy that into the hull with part of it inside the hull part of it outside the hull. Then I make my bend in the 1/4 tube and insert it into the 9/32 to go through the hull. Thenmake up a small bushing to go in the end near the coupler to reduce any slop. Then use a small piece of shrink tube over the flex and end of the stuffing tube to keep water out. This setup makes it easy to adjust the bend or replace the stuffing tube, you just slide it out of the 9/32 tube. Alot of guys here use this setup, maybe someone can explain it better.
I use the Grimracer blue speed grease. It's sold here on OSE in the store section.

Mark

[Yvan]

Wow, very interesting Mark ! i will adapt your setup for a .150 flexcable...

just one more question ! when you talk about ''a small bushing to go near the coupler to reduce any slop'' ,
i don't really understand (

[marko500]

On my boats the .187 cable fits loose inside of the 1/4 tube. So I use a piece of 7/32 tube about an inch long and CA glue it in where I stated in my last post.
One thing I found on my boats is that without the teflon the driveline tends to rattle when not in the water. (I only run it for a second to check prop rotation) But once in the water under a load it is quiet.
I"m terrible at explaining things and you sure are making me work tonight! LOL Just kidding I'm glad to help a fellow boater in any way I can. If your still confused let me know and I'll try to explain it better.

Mark

[Yvan]

LOL Mark !!!!!

O.k., now it's perfectly clear )

I have some work to do now + a paint job ...too late for summer 2011,
but plenty of time for summer 2012 !!!!!! )

Yvan