The Spitfire Forums

Historic Aviation => Spitfire => Topic started by: Editor on March 22, 2009, 10:53:30 PM



Title: Undercarriage retraction
Post by: Editor on March 22, 2009, 10:53:30 PM
As we all know, the undercarriage on the Spitfire did not retract symetrically, but can anyone tell if it was designed to retract in any particular sequence? And if so, which wheel started to retract first?


Title: Re: Undercarriage retraction
Post by: gingerbob on March 27, 2009, 01:30:58 PM
Hydraulic gear retraction generally does what it wants to do- whichever "circuit" has the least resistance starts moving first, since the circuits (left and right legs) are in parallel.  I checked the Spit V manual, and there is no sequencing valve mentioned.  Now, there may be a tendency for one side to lead, brought on by airflow effects, the plumbing, or something else, but no hard and fast rule.

bob


Title: Re: Undercarriage retraction
Post by: Antoni on March 28, 2009, 12:56:46 AM
A discussion of this phenomenon can be found here.

http://forum.keypublishing.co.uk/showthread.php?t=76587&highlight=retraction


Title: Re: Undercarriage retraction
Post by: Editor on March 28, 2009, 10:53:28 PM
That, I believe, explains it. Thanks!