I am building my AIM-9 short kit from KN. But I have - posers....
I installed a 29 mm motor tube in the fin unit. Glued fin unit to body tube using Bob Smith epoxy.
Now I need to find the center of gravity. Instructions say it should be the midpoint of the 22 inch body tube.
So I loaded a CTI H133 into a 3 grain case and installed it. Put on the nose cone. And I used a 4 inch wide 1/8 inch thick piece of basswood as my "knife edge".
It is really tail heavy. I added Daisy steel bbs to the nose cone. (Yeah, I know - lead shot would be better.) And the CG moves forward. But not enough.
So I wind up with 333 grams of bbs in an almost full nose cone, and it is still short of the mark.
Have I missed something? Have I made a mistake?
If you have built one of these how much weight did you put in the nose. And what did you use? Lead shot? Tungsten? Depleted uranium?
Thanks to all.
Bob in Phoenix
NAR 112473
Level 1 THOY Falcon CTI H163 21 Nov 21
I installed a 29 mm motor tube in the fin unit. Glued fin unit to body tube using Bob Smith epoxy.
Now I need to find the center of gravity. Instructions say it should be the midpoint of the 22 inch body tube.
So I loaded a CTI H133 into a 3 grain case and installed it. Put on the nose cone. And I used a 4 inch wide 1/8 inch thick piece of basswood as my "knife edge".
It is really tail heavy. I added Daisy steel bbs to the nose cone. (Yeah, I know - lead shot would be better.) And the CG moves forward. But not enough.
So I wind up with 333 grams of bbs in an almost full nose cone, and it is still short of the mark.
Have I missed something? Have I made a mistake?
If you have built one of these how much weight did you put in the nose. And what did you use? Lead shot? Tungsten? Depleted uranium?
Thanks to all.
Bob in Phoenix
NAR 112473
Level 1 THOY Falcon CTI H163 21 Nov 21