How do you tell when the CG is right on a PBF?
03-06-2003, 05:56 AM
#1
How do you tell when the CG is right on a PBF?
Yesterday I put a number of flights on my new SuperTigre .29 powered PBF. What a blast to fly! I was a little worried about hand launching it myself on its maiden flight, but it just flew out of my hand without a problem. Once I got it in trim it flies surprisingly straight. I have just started to explore its flight characteristics, but I am sure this is going to be a lot of cheap fun!
How can I tell if the CG is right? I am used to flight testing my normal planes to find the best CG and was wondering if that technique will work on a PBF?
Here is a picture of my PBF...
How can I tell if the CG is right? I am used to flight testing my normal planes to find the best CG and was wondering if that technique will work on a PBF?
Here is a picture of my PBF...
03-11-2003, 07:51 AM
#6
Join Date: Sep 2002
Location: Drouin, Victoria, AUSTRALIA
Posts: 1,751
Likes: 0
Received 0 Likes
on
0 Posts
How do you tell when the CG is right on a PBF?
Personaly i cant hover BUT from what i've read: As back as far as possible without making it un fliable But having said that if it's near enough your thumbs do the rest
03-12-2003, 12:40 AM
#7
How do you tell when the CG is right on a PBF?
Originally posted by Woodsy
Personaly i cant hover BUT from what i've read: As back as far as possible without making it un fliable But having said that if it's near enough your thumbs do the rest
Personaly i cant hover BUT from what i've read: As back as far as possible without making it un fliable But having said that if it's near enough your thumbs do the rest
03-12-2003, 04:51 AM
#9
Senior Member
My Feedback: (3)
Join Date: Oct 2002
Location: Nashville,
TN
Posts: 551
Likes: 0
Received 0 Likes
on
0 Posts
How do you tell when the CG is right on a PBF?
I have all my 24x24 pbf balanced at 6" back. They hover and harrier great. I started at 5" back and they did fine there too, but I like 6" back better.
Jason
Jason
03-12-2003, 08:25 AM
#10
Join Date: Sep 2002
Location: Drouin, Victoria, AUSTRALIA
Posts: 1,751
Likes: 0
Received 0 Likes
on
0 Posts
How do you tell when the CG is right on a PBF?
From my experiance a tail heavy PBF is just lke any other tail heavy plane, it snaps and buck and carries on like a mad woman
03-13-2003, 09:41 PM
#11
Senior Member
Join Date: Jan 2002
Location: minneapolis,
MN
Posts: 645
Likes: 0
Received 0 Likes
on
0 Posts
How do you tell when the CG is right on a PBF?
My 24X24" PBF is ballanced at 23% or 5.5" back from the leading edge. I find that this is the neutral point because I don't need any elevator trim changes to fly inverted. I used to fly it at nearly 6" back and it would tend to balloon when flying inverted. It was still very stable at this aft C.G. location (it would fly right side up 'hands off' very nicely), but I prefer not needing trim changes when flying inverted. Manueverability and hover stability appeared to be the same for both C.G. locations. Good luck with your PBF!
