Morris Knife
 

I just picked a partially-built Knife. IT all appear there and only the fuselage is built and it looks okay, but the builder did not appear to add pull-pull tubes.

As a result, I am now trying to decide if I should rip off the sheeting to install pull-pull. My other option is to try to install the pull-pull like I did on my Wasp. The rudder was mounted dead center inside the wing with wires exiting at trailing edge.

I also quickly noticed the very sparse instructions included with the old Knife kits.

Any suggestions?

Do It Right...
 

I know it sounds like a pain but strip off the sheeting and properly place the tubing for the pull-pull. It will also give you a chance to check and fix any other deficiencies in the plane. You will be glad you did. Pete

Morris Knife
 

I just went through the same thing with my Pen Knife. I should have stripped that fuse for the pull pull.

Morris Knife
 

Mine has long wire pushrods on the outside of the fuse. Used a clear outer tube held in place with landing gear straps. Works like a charm. Grant it, its a push-pull :D , but its no fuss no muss and have had no problems with it.

pull pull
 

I have pull pulll on the outside of the fuse.
If you need photos email me.
Bugs

Morris Knife
 

hey...its a profile...theres a chance it may not be around long......do the easy thing....go with 30" rods on the outside........try to get them and your servo arm close to the fuse with out touching the fuse.....and if you can make them run directly opposite each side thats a plus use nylon gear straps to keep them from flexing...no problemo's...
Heres a pic of my Knife right and left fuse sides...dont know if you can tell it but the rods area directly same height on both side of the fuse and then the nylon straps hold in place...
.gator

Morris Knife
 

LEFT SIDE

Re: Morris Knife
 

Just out of curiosity, is it the one that was recently for auction on ebay ?

term's pics
 

Termagator, is that a fixed tailwheel? I can't barely taxi in a crosswind with a steerable tailwheel. (And what a beautiful airplane!)
Tom onrecess

Morris Knife
 

thanks Tom
It is a fixed tailwheel.....alot of these profiles have hard time steering in crosswing...this one taxi's OK under normal conditions...thats the top of the plane in my avitar.......gator

Morris Knife
 

Termagator, your installation of pushrods with the sight torsion/bow is the same way I do my profiles. I converted my Topcap ARF recently. It's a lot smoother than the internal pull-pull cables. I won't do the small profiles any other way after seeing how efficient and smooth they work. I guess some people may find them unattractive, but gosh, they are the ticket IMHO.

JW

Morris Knife
 

I run pushrods on my topcap arf, knife arf, 2 knife kits.
I like to use 4-40s rods, I am sure you can use 2-26 as well.

Morris Knife
 

Plus....its just a profile ? functional is the key....Gator

Morris Knife
 

Remember pull pull geometry doesn't mean the cables have to be a straight shot back to the surfaces. I friend accidentally got CA in one of the tubes so he just ran the cables down the side. You can use the pushrod method but it's heavier and weaker.

Heck if you wanted to just cut the sheeting enough to bury the cables then use filler and sand flush. Once it's covered you'll never notice it.

Morris Knife
 

.

Morris Knife
 

That looks more like a Lanier Pro Twister...

Morris Knife
 

hey ...I never seen one with 2 pushrods on the same side......I've built about 11 of the P.T.s.....gator

Morris Knife
 

oops forgot which was which i had both covered the same