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From: Matt Hapgood <matt.hapgood@alumni.duke.edu>
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Subject: Re: [LML] LNC2 Gear Up & Down Problems

I addressed the problem by installing a (legacy?) three way dump  
valve. That added a return to the reservoir to bleed off pressures.  
Works perfectly, but was a minor hassle. I would have happily paid a  
few hundred for a simpler solution.

Matt

On Sep 21, 2009, at 10:33 AM, Lorn H Olsen <lorn@dynacomm.us> wrote:

> I have determined that the problem is caused when the hydraulic  
> pressure at both switches is high enough that not only does the pump  
> not run but also high enough that when the dump valve is opened the  
> pressures are still not relieved to be below the pump run setting.  
> eg. If I fly high and the temperature on the ground, after landing,  
> is 60 degrees farenheight more than the temperature in flight, the  
> gear won't go up on the next flight.
>
> An EE friend of mine, after seeing our hydraulic system schematics,  
> talking to Lancair and talking to Oildyne, has come up with 3  
> solutions to the gear not going up and/or coming down. I am out of  
> town and haven't had the chance to see the solutions. Would anyone  
> be interested in a kit that solved the problem for $200 to $400.
>
> --
> Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
> DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
> LNC2, FB90/92, O-320-D1F, 1,615 hrs, N31161, Y47, SE Michigan
>
>
> --
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