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mwiebe(at)sympatico.ca
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 Posted: Sun Jan 15, 2006 3:28 am Post subject: gear retract - continued |
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Well, I guess the list won’t survive if we don’t answer the questions that people ask of us on the list! George, regarding the spring on the clamshell nose gear doors…..The idea is somewhere at seqair.com – I just can’t find it right now. I”ll describe it in the gear up position. In essence, its about a 1/8” diameter spring steel rod attached to each gear door, that goes up and over the nose gear strut. On either side of the strut, the rod has two complete “loops” in it, which create the spring effect.
Upon closing, the nose strut hits this spring steel rod and pulls the gear doors up with it. The door attached to the gear overlaps the clamshells a little, and holds them up. Upon opening, the spring does its thing by trying to straighten and pushes those doors open marvellously. In theory, it could cock off to one side. However, if each of your doors operates smoothly, and the spring is “tough” and built symmetrically, that just won’t happen. I was concerned of the gear failure mechanism if one door closed with the gear down, so we did visuals from other aircraft while cross controlling with full rudder. The doors are rock solid in every circumstance I can create with my lead feet!
Regarding the gear down warning system. We don’t have the system of mechanical indicators sticking up through the wings (I don’t think many falcos actually do this). However, all of Alfred’s gear mechanisms have two little tabs welded on to them, which are intended to be the mechanical strike points for those indicators. We just placed microswitches in the gear wells that struck those tabs instead, and wired them to a couple of lights in the cockpit. On the nose gear, we tapped into the down limit microswitch circuit to accomplish the same goal. Now, I actually do get “three green” when I put the gear down.
Mike
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george(at)falco.co.nz
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| Posted: Sun Jan 15, 2006 12:50 pm Post subject: gear retract - continued |
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Thanks for that Mike... My light system is the same in that I get three greens but didn't use all three for sense purposes to keep it "standard".
Re the nosegear doors... OK.. I've got the plans on that one. I was trying out the different system that was in an FBL somewhere that Ian has on his machine... Mine needed stronger springs than I tried and the doors started to close on the ground with increased power so I took them straight of.. I haven't put them back on yet.. I my get the regular spring and see how I get on.
Cheers
GR
www.falco.co.nz
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