H9 Aresti question
12-29-2011, 05:39 PM
#3
RE: H9 Aresti question
When I first began flying mine, several years ago, I used larger dia., low pitch props on my Rossi .53. After not flying it for a long time, I have tried shorter props with more pitch (APC 10x8, peaks at 14,400-launch at 13,600 or so) and have found "the Wall".
No apparent damage, but I'm not sure which surface fluttered. I had connected the elev. halfs with a large hardwood dowel in an efort to prevent the two separate pieces from fluttering; don't know if that really helped or not???
Don't know how fast this thing really is, but it gets small in hurry!
Thanks,
Jim
No apparent damage, but I'm not sure which surface fluttered. I had connected the elev. halfs with a large hardwood dowel in an efort to prevent the two separate pieces from fluttering; don't know if that really helped or not???
Don't know how fast this thing really is, but it gets small in hurry!
Thanks,
Jim
12-29-2011, 05:57 PM
#4
RE: H9 Aresti question
....yep. I gotta fire up my old computer and see if I can find the details.
I believe it was the horizontal stab....the reason is because the elevator
surfaces are way too big, causing the flutter. If I can't find the info. I'll
do a search on...."Flyboy Dave Arresti problems".
I still have the plane....Ill get more info tomorrow.
I believe it was the horizontal stab....the reason is because the elevator
surfaces are way too big, causing the flutter. If I can't find the info. I'll
do a search on...."Flyboy Dave Arresti problems".
I still have the plane....Ill get more info tomorrow.
12-31-2011, 09:15 AM
#11
RE: H9 Aresti question
....as I recall, the elevator caused the horiz. stab to break where
it attached to the fuse. You can see in the picture I posted that
I cut the covering back and glued the stab back solidly to the fuse.
The covering I had on hand didn't match the original color perfectly
but at that point I was happy to still have the airplane in one piece
after the audible flutter.
The hinges held up fine, I believe, and the vertical stab and rudder
were not effected.
That plane is a "snapper".....that is to say, if you pull back too
much elevator you will be rewarded with a near perfect unexpected
snap roll. [:@]
it attached to the fuse. You can see in the picture I posted that
I cut the covering back and glued the stab back solidly to the fuse.
The covering I had on hand didn't match the original color perfectly
but at that point I was happy to still have the airplane in one piece
after the audible flutter.
The hinges held up fine, I believe, and the vertical stab and rudder
were not effected.
That plane is a "snapper".....that is to say, if you pull back too
much elevator you will be rewarded with a near perfect unexpected
snap roll. [:@]
12-31-2011, 10:31 AM
#12
RE: H9 Aresti question
Dave,
Thanks for your time to help with this "project". I plan to reduce the elevator size per your example, maybe 20-25% to start, and since I want to use the 53 on another model, I think I will put one of my Rossi 45s in it's place.
My buddy and I were impressed with the speed (un-documented) of the Aresti when the 53 was really singing, but it's never gonna be really fast, anyway. We'll see what the F20 does with the 53 up front. It may be too quick for my old eyes and fingers!
Cheers,
Jim
Thanks for your time to help with this "project". I plan to reduce the elevator size per your example, maybe 20-25% to start, and since I want to use the 53 on another model, I think I will put one of my Rossi 45s in it's place.
My buddy and I were impressed with the speed (un-documented) of the Aresti when the 53 was really singing, but it's never gonna be really fast, anyway. We'll see what the F20 does with the 53 up front. It may be too quick for my old eyes and fingers!
Cheers,
Jim
