|
CMpro Giles CG
Can anyone help me with the CG for a CMpro giles 202 .40-.50 size aircraft?
A friend purchased one second hand recently but it has no manual in the box. Thanks, Ray |
RE: CMpro Giles CG
If noone answers with the numbers from the CMPro manual, there is a simple and very reliable alternative. Take a yardstick and about 5 minutes of your time and measure the model you have sitting before you. Plug the numbers into this application http://www.geistware.com/rcmodeling/cg_super_calc.htm give it 20% for the Static Margin and click the button. Record the CG location. Then change the 20% to a 5% and click again. Record that second CG and you've got a safe, reliable, usable range for the CG that will work for your model.
|
RE: CMpro Giles CG
I've got one of these...
Wonderful flyer... I'll look up the recommended C.G. when I get a chance. |
RE: CMpro Giles CG
ORIGINAL: da Rock If noone answers with the numbers from the CMPro manual, there is a simple and very reliable alternative. Take a yardstick and about 5 minutes of your time and measure the model you have sitting before you. Plug the numbers into this application http://www.geistware.com/rcmodeling/cg_super_calc.htm give it 20% for the Static Margin and click the button. Record the CG location. Then change the 20% to a 5% and click again. Record that second CG and you've got a safe, reliable, usable range for the CG that will work for your model. The plane isn't assembled yet, we have another few projects on the go first but if no one comes to the rescue we will definitely use it. |
RE: CMpro Giles CG
ORIGINAL: opjose I've got one of these... Wonderful flyer... I'll look up the recommended C.G. when I get a chance. Good to hear that it flies well. My friend bought it on a whim as the seller wanted half price for the plane and it hasn't even been put together. Maybe he was frightened off by the missing manual :) I used to be intimidated by ARFs until I built my first kit and that seemed daunting until I strated my first plan build :D |
RE: CMpro Giles CG
Glad you got some help coming.
Sounds like a good purchase. I'd hazzard a guess that the seller could have been scared off by "FEAR OF TIP STALL"!!!!! He probably saw a less experienced flyer lose one of those semi-scale Aerobatic planes like the Extra, Edge, Giles and then heard the discussion about how they all fly. Heck, he could have seen an experienced flyer lose one. They will all bite you if you let 'em. Actually, they bite themselves. They're made to stall. That's how they do their snap maneuvers. And it's in the design, so bandaids like adding washout don't do a lot to cure them. Keep in mind that tapered wings stall from the tips naturally. And when one wing stalls, the sucker rolls out of whatever you were trying to do. Unless it was a maneuver that needs a stall to do. This is a beginners forum, and beginners really should learn early on about wing planforms. Models with tapered planforms should be left until the beginner isn't a beginner any more. |
RE: CMpro Giles CG
ORIGINAL: TZflyer Great opjose, I would appreciate it. Good to hear that it flies well. My friend bought it on a whim as the seller wanted half price for the plane and it hasn't even been put together. Maybe he was frightened off by the missing manual :) I used to be intimidated by ARFs until I built my first kit and that seemed daunting until I strated my first plan build :D I couldn't find the manual. I may have tossed it. I'll try to get the info from a friend who also has one. Worst case there is another thread on this plane here. It already may be covered on that thread. |
RE: CMpro Giles CG
If you measure from the leading edge of the aileron, right at the in board side of the cutout for the aileron, forward 200-250 mm.
I have the manual at home and can list the way they say to find it. It is like 300 to 350 mm from the leading edge 600 mm from the center line of the fuse. Are you confused yet? Dru. |
RE: CMpro Giles CG
Thanks, I will use the aileron measurement. Sounds easy enough.
|
RE: CMpro Giles CG
ORIGINAL: opjose ORIGINAL: TZflyer Great opjose, I would appreciate it. Good to hear that it flies well. My friend bought it on a whim as the seller wanted half price for the plane and it hasn't even been put together. Maybe he was frightened off by the missing manual :) I used to be intimidated by ARFs until I built my first kit and that seemed daunting until I strated my first plan build :D I couldn't find the manual. I may have tossed it. I'll try to get the info from a friend who also has one. Worst case there is another thread on this plane here. It already may be covered on that thread. |
RE: CMpro Giles CG
ORIGINAL: da Rock Glad you got some help coming. Sounds like a good purchase. I'd hazzard a guess that the seller could have been scared off by "FEAR OF TIP STALL"!!!!! He probably saw a less experienced flyer lose one of those semi-scale Aerobatic planes like the Extra, Edge, Giles and then heard the discussion about how they all fly. Heck, he could have seen an experienced flyer lose one. They will all bite you if you let 'em. Actually, they bite themselves. They're made to stall. That's how they do their snap maneuvers. And it's in the design, so bandaids like adding washout don't do a lot to cure them. Keep in mind that tapered wings stall from the tips naturally. And when one wing stalls, the sucker rolls out of whatever you were trying to do. Unless it was a maneuver that needs a stall to do. This is a beginners forum, and beginners really should learn early on about wing planforms. Models with tapered planforms should be left until the beginner isn't a beginner any more. I am glad you like the aircraft as he was a bit dubious about getting it cheaply but I think you are spot on about the original owner being scared of it. |
| All times are GMT -8. The time now is 09:15 PM. |
Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.