fightercat twin build problem

[RIPFENCE]

hi guys,

i am in the process of trying to install the stuffing tubes on my fighter cat daytona twin..i have a problem though..i have quite an angle that the flex is going to take to mate up with the flex coupler...currently i have 7/32 brass tubing and 3/16 flex cables..(no teflon liner) the problem i am having is that there is such a bend that my driveline is not smooth at all...is it possible to use 1/4 inch tubing instead with no liner to free up the cable? or am a taking too much of a risk that i will have cable whip..i have noticed on some hpr builds that there are pretty sharp bends in the cable also..i cannot move the motor angles so what should i do?

thanks
rip

[Eodman]

I know ... I know send me the boat!

I have no freakin clue!

[Eodman]

In my twin Jolly the motors are mounted farther towards the bow! Same thing with my sons twin Intruder.

The farther up front the lesser the curve!

[RIPFENCE]

In my twin Jolly the motors are mounted farther towards the bow! Same thing with my sons twin Intruder.

The farther up front the lesser the curve!

yes i agree if i moved the motors a little farther forward it would not be as much of an issue..but its really a tight fit inside its incredibly small for a 37 inch hull

[Rumdog]

Do you have room to angle the motors at all? Tilting the shaft side downward?

[RIPFENCE]

Hi ryan...i have very little room and the motor mounts are not adjustable..they are just fixed mounts ben has on his sight..i may just take a chance with the 1/4 inch brass tubing..or maybe i can find a new alternative to brass tubing that has a little more flex and yet can keep the cable in place also...

[RIPFENCE]

Right now the cable seems to turn like ass...not smooth at all

[chummer]

Personally, I would find another way to lay out your setup. I would'nt take a chance on that, just too much angle. I would try to bend the mounts so you have more angle on the motor and less angle on the stuffing tube. Also, I would try to move the motors farther forward.

Can you take pics showing the motor and mounts?

[woodster]

Seems like all of the twins I've seen have the motors tilted at an angle to help out with this problem. I bet if you could somehow do that it would help

[RIPFENCE]

i will fool with it some more to see if i can get the angle a little better...thanks guys

[steveo]

i have used 1/4" tubing with .187 flex its noisy but it was super smooth and the length was about 14" i did not have a problem with whip, i doubt you will

[carlcisneros]

if the mounts have NOT been glassed in place, you can make an angled wood support for the mounts and then you would have a lesser angle for the flex shaft.

That is what I am going to do once I start building my Daytona.

[Jeff Wohlt]

Increasing the tube size is not the answer. Only thing i see is moving the mounts forward and angling the motors more...which sucks

[yurkanip]

I agree, that moving to 1/4 stuffing tube is not the best answer in terms of an alignment issue. BUT, I do know many guys who run big power setups, have used 1/4 stuffing and .187 flex. The only thing that has to be done, is a short 7/32 brass "sleeve" is placed at the end of the tube near the coupler, and use a 7/32 bushing in the strut/rear of the flex. This should keep it dry with grease. A flex will whip if unsupported, only if it is dead straight the entire length. If you put, even one slight bend it it, the whip is non-existent. Example being: take a flex and put it in a cordless drill...hold it hanging down and run the drill it will whip violently. now hold it in your hand and let it pass through your fingers with one or more bends in it, and no whip. (just an easy way of describing a hands on demonstration).

Just my .02

[keithbradley]

Rip I would ABSOLUTELY run the 1/4" tubing with 3/16" flex. I have had problems with a lot less bend than what you have there, and I am not alone. Don't run the 7/32". You can use a peice at the end as a bushing as mentioned but if you use it the whole way it will do exactly what it seems like its going to. I was in the same position you are now (except my tube had much less bend and still seemed to tight) but decided to try it and didnt even make it a full run.

I would still aim to change the angle of the motor to straighten things out, but dont use the 7/32", even then.