LNC4 slow flaps

Submitted by Anonymous on

Forums: 

From: Skip Long <skiplong [at] me.com>
Sender: <marv [at] lancaironline.net>
Subject: LNC4 slow flaps
Date: Tue, 18 Feb 2014 09:08:27 -0500
To: <lml [at] lancaironline.net>

Hi group,



I just replaced my hydraulic flap actuator with a new unit purchased from

Lancair. This unit was manufactured by a different company then the original

unit in my 1998 kit. The flap down speed is much slower then with the older

actuator. Flap up speed is the same.

Anyone experience this after installing new Flap actuator?

Different actuator specifications?



thanks

skip

LNC4 slow flaps

Submitted by Anonymous on

From: Robert R Pastusek <rpastusek [at] htii.com>
Subject: RE: [LML] LNC4 slow flaps
Date: Tue, 18 Feb 2014 15:26:15 +0000
To: Lancair Mailing List <lml [at] lancaironline.net>
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Skip wrote:

Hi group,



I just replaced my hydraulic flap actuator with a new unit purchased from Lancair. This unit was manufactured by a different company then the original unit in my 1998 kit. The flap down speed is much slower then with the older actuator. Flap up speed is the same.

Anyone experience this after installing new Flap actuator?

Different actuator specifications?





SKIP: There is a needle valve in the hydraulic system that governs flow to the flap actuator cylinder, and hence the flap lowering speed. If built according to the manual, this valve should be located near a "manifold block" in the wheelwell area. Most of us put it on/near the aircraft centerline to be accessible from the wheelwell area when one of the gear doors is opened (gear extended). Give a look around that area for this valve and adjust it as needed...



Bob