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info(at)flylightning.net
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 Posted: Thu Apr 22, 2010 1:14 pm Post subject: New Gear Lightning |
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Dennis,
Here is a copy of an email I sent to ryan about the new gear sho0uld give a good idea of how to install the torque supports.
Add to the center of the fuselage against the seat bulk head in the center; 8 layers 10oz glass 3” by 6” , than 2 layers 10oz glass 6” by 6” .; this will build up the plys for the correct structure.
Nick
From: flylightning [mailto:info(at)flylightning.net]
Sent: Thursday, March 04, 2010 3:55 PM
To: 'ryan gross'
Subject: New Gear Lightning
Ryan,
Here are 2 good pictures of the landing gear. The first is head on , should give a good idea of the difference in the stance and track. Second is the upgrade to the box, similar to the old box just a different configuration.
The main reason for the change was the factory built LS-1, and the possibility of it being in a flight school. The original gear is more than sufficient for a current pilot. It was designed to be a good gear and be lighter weight. We new the offset to this would be a gear that, should it be dropped in hard could bend but not break. We designed it to do this so the load would not transfer to the airframe and the only damage would be a 70 dollar gear leg.
The new gear design is only slightly heavier at about 2lbs a side so the weight vs benefit in structure is reasonable. The new gear has a much shallower angle than the old gear. This allow no increase in aircraft height but a longer leg which can flex more and put up with abuse better, ie a longer bending moment with more flex. The leg is larger at the top and bottom than the old and incorporates multiple tapers to bend and flex appropriately.
Drop test with the old gear showed what we thought, deformation of the gear when a dead drop from 20” is performed. However the gear did not fail.
The new gear is ASTM compliant and went thru the above drop test with no issue and several other drop situations and well. In fact due to our nature ( guys trying to break stuff) we dropped the new gear over a dozen times from varying heights and never did it bend of fail in any way.
The new gear will eventually be added to the kit aircraft as well and the old gear will be eliminated all together. For now the new gear design can be part of a kit upon request. We have a few of the original gear boxes to use and those will be supplied with kits until we are out or if the customer specifically request the new design. Either way it is your choice.
Nick
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Clive J
Joined: 03 Nov 2007
Posts: 340
Location: UK
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