Hi all

I am in the process building the ARF Primary Force .
After opening the wing hatch to get access to the bellcrank,
I really don't trust the leadout crimping at the bc
which is made by a short (5mm) flatten copper tube.
The leadout cables (stainless free) slipping through the sheet metal bellcrank hole (not bushed).
To my understanding...the bc axle (steelpin) is fixed/glued more or less to the main spars , top and bottom.
To get all this bs done the Right way ,I have to remove bc axle to pull bc out off the wing,
to  replace bellcrank (4inch) and leadout cables with solid crimping.
I also would go for balljoint at bc.
Sorry, don't have the P.F. drawings.
How can I fix this without a kill .
I would give this P.F. (private fa.t) 30 flights or less, leadouts off the bc and
the P.F. is history.....yippee.
I know.....you get what you paid for.
Sorry for the hard words ...somekind of disappointment here in the cave,
but the rear fuseend also has bow starting right after wing cutout to inside circle, would say 3-5 degrees.
Finished the 5th day trying to bent back fuse into neutral with Hot Iron and Hot air blower and weights.
The damn fuse allways jumps back.
To my understanding,
it is not smart to laminate 3 layers of Balsa ,each of different density ,hardness or stiffness.
Wood still works after cutting
some faster,some slower......that's why the fuse is bend like hell to inside circle.
This Kit was bought from the U.S. DEC. 2007 from a long time CL Buddy which was given to me ,a few days back to build,.........
because......... .
The kit was kept in dark and dry room for years and was straight (wing and fuse) like a razor edge
.....till.....
THE P. FORCE STROKE BACK.  

Thanx for your input
Peter  

I just slapped mine together as it came...want to see how it goes. I really like this plane. Flying mine tomorrow.
Shug

Ha, so that's what I am, a "retread"? Yes, that was a great flyer, Ty.
....

Hey Bill!,

You can rest easy.  It could well be that Ty was referring to me.  He let me fly one of his PF's before you ever showed up.  He ended up pulling the engine off of what was left and tossing the rest of the debris into a trash can.

That was the first of 4, that's right, FOUR PF's that have been disposed of by moi.  It is a far better design/model than I am as a "retread" flyer.

  I have what I think is the oldest production SIG P-Force in the air, and the only thing i changed was the push rod because it was too short. Everything else was assembled as per instructions. The lead out cables are double looped through the bell crank if I remember correctly, and I left them as they were. I just used a Q-Tip to put a little grease on them. I check them frequently and have not seen any sign of fraying or breaking. I think it is pretty damn hard to get the bell crank assembly out to do any changes, and will admit that is the main reason I didn't change anything! But I have a bazzillion flights on mine, and it's on it's second covering job, all Monokote and it's third engine (OS.32E) I don't think I have ever heard of any kind of control failure with a SIG P-Force. but it was designed and built by humans so it is possible.
  I believe the kit hit the store shelves in early 2006 (January) and I had mine ready to fly by our winter contest at the end of February, 2006, so that makes mine older than yours! Took second place in profile stunt on it's 5th flight!
   Good luck and have fun,
   Dan McEntee

Hi Dan
Yes, the  lead out cables are indeed double looped through the bell crank  ,
made the lead outs today and pull test 10G (pulling 3 times in row 12 000grams)  .
No noise , "Perfect"   .
I leave it like it is with the Banana   fuse and make sure stab line is parallel to Wing line  .
Maybe go for 1oz wingtip weight  

Thanks for your Input
Peter  

Hi all

My P.F. came out very tail heavy in combo with the light Enya SS 30 S and stock muffler.
Should add more than 2 1/2oz to meet C.G. at 2-1/8 after LE at fuse.
Plan  1
go for heavier engine like OS LA 40 or
Plan 2
stay with the Enya + built up cheek cowl to a give a better joint
between fuse and wing ??.
Total weigh, ready to fly, No fuel, is 1150grams 38oz ?.
What do you thinking

Thanks
Peter   

I have seen many P/F fly and even with FP/LA 40's or TT36 engines some really figured they needed that stock muffler or did not have a decent tongue one to use. Most of the time they fly heavy.
I built my own model and used a K&B 28 and used the stock muffler as it is incredibly quiet and is moderate weight. Power with a 28 K&B is not at a dis advantage and the engine happily thinks it's a 4 cycle as it chugs along swinging an 11/4 Zinger Pro through the pattern. It is languishing now as I'm converting over to electric slowly and surely.

Dennis

Hi all

here's my ready to fly "Primary Force".
Had to add 35grams (1oz + a few hairs) lead underneath engine (Enya SS30 S)  +
OS brick muffler (LA 40/46) to
hit C.G. .
Maiden flight must wait,
weather is just to lousy.
Could be an Easter Weekend Holiday present 2016.

   Cheers Peter