WIX Archives
Re: DO NOT HANG up your aeroplanes... I disagree!
Posted by bdk on Tue Sep 02, 2003 07:02:52 PM
In reply top Re: Re Mostly - DO NOT HANG up your aeroplanes. Bad, bad idea posted by simon king on Tue Sep 02, 2003 07:43:19 AM
If done correctly, hanging should present no problems. Hanging occurs at 1g only, so the forces are quite low compared to a 6g maneuver. If you look at the lift of a wing, it all gets concentrated at the spar to fuselage joint where many aircraft are hung from. In fact, resting on the gear puts more bending moment into the wing (except for a 109 of course where the gear are attached to the fuselage). Another popular place is where the engine mount meets the firewall, where the airframe must react the engine weight and prop gyroscopic forces. The P-51 has fittings (they look like holes, but there is a casting inside) in back for using a pipe to tie down the tail for high power run-ups, shipping etc., so this area can be used to suspend the rear of the airplane without worry.
Of course if you have to cut holes in the cowling or wing root fairing to attach cables, that isn't a good thing.
You also risk damaging the airplane when you hoist it, but once in place the aircraft is probably safer from souvenir hunters and rugrats. I remember IWM taking away my umbrella when I visited. I guess that they were worried that I would poke holes in the display aircraft...
: Has anybody done any long tern research into the harm that
: this method of display is doing to historical airframes??
:
: When an aircraft is flying forces are spread over the whol
: e wing area - in suspension forces are concentrated on a l
: imited number of points -completely at odds with thedesign
: brief - surely thats stacking up problems for the future