"CAT"astrophic day on the lake

[tiqueman]

Yes its centered. Ive got the cable and everything, I just need to find a control arm that goes out both sided of the rudder.

EDIT, I talked to Steven and he said he has nothing available for that rudder. I will probably have to scratch one.

[domwilson]

Maybe you can fabricate one. A shot in the dark, like maybe from an old servo horn?

[tiqueman]

Thanks Dom. Its getting there. I ordered some seals and tubing from Steven today. Really my only glitch is going to be figuring out how to make the rudder a pull pull system. Ive got to find or make a dual control arm. I think If I cannot find one, Im going to get an aluminum servo control horn, drill it to fit the pivot shaft in the rudder and drill and tap a hole in the side for a set screw. Ive been trying to find an arm online but so far Ive come up w/ nothing....

[domwilson]

Yeah, I saw that after I typed. Didn't want to let some good typing go to waste.

[tiqueman]

LOL I do that all the time

[tiqueman]

Im thinking down the road an 8xl Feigao? Im putting an etti 150 in it.

[domwilson]

Maybe some of the guys with outboards might have an idea.

[domwilson]

Found what you're looking for here... http://206.206.85.209/xtdoc/catalogu...e&store=mhzusa

[domwilson]

Im thinking down the road an 8xl Feigao? Im putting an etti 150 in it.

I think that would be great on 4s.

[tiqueman]

Good find on the control horns!

And thats what I was thinking about the 8xl. A 2s pack fits nicely in the sponson. The 3S doesnt quite fit right.

[domwilson]

Plus you want to keep your RPM's in the 27k-32k range.

[Flying Scotsman]

Scott, that is a VERY nice rebuild...congratulations...that cat is 32" long what speed are you looking for, an 8XL on 4S and a large prop[ may be a problem

Douggie

[Gerwin Brommer]

Make sure you "insulate" the points where the rudder/servo rods/cables exit/enter the hull.
If any "moving"metal touches the carbon you'll get radioglitches !!!!

[tiqueman]

Douggie, thanks for the compliment and mid 40s to 50 would be great.

Gerwin, thank you for the tip. I never though about that. Now I wont have to post about "Radio Problems" in the future.

Scott

[tiqueman]

Well, I got her back in the water today. She ran quite well. Had to adjust my strut setting quite a bit from where it used to be. I guess because of more weight due to the CF lamination and addition of a bulkhead etc. It seems to want to ride a lot more bow heavy, which to me doesnt make much sense. But I seem to have it just about right now. I havent gps'd it yet. But Id say shes just about 40. Ive got a few more "tweaks" to make.

I had a drive line issue w/ the motor coupler. I had to modify the motor shaft as the Proboat motor has a flat grove in it for the set screw. So the flat part of the shaft does not run out to the end. I filed it down because after adding the thrust bearing at the motor, the set screw for the coupler was not getting to the flat portion. Anyway, It looks and feels straight, no bump where the new flat meets the old flat, however, the coupler had a wobble to it. If I remove the thrust bearing and put the coupler back to its factory location, it is perfect. So, I guess the Proboat motor isnt getting a thrust bearing... for now anyway.

Other than that, I got my pull pull steering figured out. I simply took an aluminum servo control horn and drilled it out to 3/16. Then drilled and tapped the side for a 4-40 set screw. Worked beautifully. Ive still got to trim down the control horn (one of the tweaks)

I also installed thru hull pick ups and eliminated any water lines outside the hull. I temporarily stuck a pan head phillips screw in the top of the rudder to block that water flow. I will be replacing that w/ a button socket or cap head once I can locate one.

Im having an issue w/ velcro sticking to the epoxy I used to laminate the CF in. sanding it, wiping it w/ acetone... it goes down like its going to stay stuck and in 24 hours its curling up and coming off. I was using it for my batts as well, but Im not trusting it at all. So... Question

Should I install (epoxy in) trays for the batts to sit in and strap velcro the batts in to the trays, OR, can I just epoxy part of the strap to the inside of the sponson and secure the batts that way??? The batts do not sit flat in the sponson. They are a little to wide so they would be on a slight angle. At the piont they are flat, they are about 3/16 down from the top of the tunnel. If that makes sense.

Heres a couple finished (almost) pics.