HQ2513 ransitioning to HQ3013????
11-22-2002, 02:16 AM
#1
Member
Thread Starter
Join Date: Nov 2002
Location: Lincoln, MT,
Posts: 32
Likes: 0
Received 0 Likes
on
0 Posts
HQ2513 ransitioning to HQ3013????
I'm building a 1/4 scale Ryson Cloudster ST-100, a one-of motor-glider, from 3-views that Jerry Ryan (son of T. Claude Ryan designer of the plane that was modified into the Spirit of St. Louis) sent me.
Span 14.4'; Root chord 16"; Tip chord 6.5"; 4 degree dihedral; straight taper with just short of 1 degree forward sweep. Estimated final wing loading should be around 16 to 17 oz/sqft.
The ship will have full span camber changing ability with 60 degree flaps possible. All changes will be by control surface droop. Droop will be less at the outboard end of the wing.
This is a scale ship...no aerobatics...looking for sedate flying characteristics and slow landings.
Strong taper (ratio of 0.40) worries me...tip stall you know!
How about some collaboration on airfoil selection to meet project criteria??
Thanks ,
Thermal Hunter
Span 14.4'; Root chord 16"; Tip chord 6.5"; 4 degree dihedral; straight taper with just short of 1 degree forward sweep. Estimated final wing loading should be around 16 to 17 oz/sqft.
The ship will have full span camber changing ability with 60 degree flaps possible. All changes will be by control surface droop. Droop will be less at the outboard end of the wing.
This is a scale ship...no aerobatics...looking for sedate flying characteristics and slow landings.
Strong taper (ratio of 0.40) worries me...tip stall you know!
How about some collaboration on airfoil selection to meet project criteria??
Thanks ,
Thermal Hunter
11-28-2002, 04:42 PM
#2
Join Date: Oct 2002
Location: Chilliwack, BC, CANADA
Posts: 12,425
Likes: 0
Received 22 Likes
on
19 Posts
HQ2513 ransitioning to HQ3013????
Looks like no one else wants to play.......... ?
The root airfoil should work just fine even for model use. For the tip the chord IS a little small and would suggest that you'll get caught with tip stalls and general lower performance thanks to the Reynolds number being so much lower. To compensate I'd probably go to a thinner version of the 3 % camber root airfoil. The camber will help delay the onset of the tip stall and the thinner section won't demand as much of the airflow. Proabably the HQ3010 or even HQ3009. Wouldn't even hurt to look at the HQ3509.
And don't forget about useing some washout. The full size design probably does also so it wouldn't hurt to copy that. If there isn't any info on the drawing I'd go for 3 degrees.......... And no "death dives".........
The root airfoil should work just fine even for model use. For the tip the chord IS a little small and would suggest that you'll get caught with tip stalls and general lower performance thanks to the Reynolds number being so much lower. To compensate I'd probably go to a thinner version of the 3 % camber root airfoil. The camber will help delay the onset of the tip stall and the thinner section won't demand as much of the airflow. Proabably the HQ3010 or even HQ3009. Wouldn't even hurt to look at the HQ3509.
And don't forget about useing some washout. The full size design probably does also so it wouldn't hurt to copy that. If there isn't any info on the drawing I'd go for 3 degrees.......... And no "death dives".........
