Re: Wheel location

Paul Buckley

That's correct Mike.
It's all down to the moment arm between the C of G and the axle.
Move the axle forward and you increase the moment arm, thereby increasing the tendency to groundloop.
Moving the wheels back, behind the C of G, requires a nosewheel but gives a self stabilising ground run.


----- Original Message -----
From: Mike Dwyer
To: Q-LIST@...
Sent: Monday, March 24, 2008 11:57 PM
Subject: Re: [Q-LIST] Wheel location

My reasoning is a tail dragger wants to switch ends when there is more
mass behind the center of lift (the main wheels when on the ground) than
there is forward. I had a buddy that could fly anything, he overloaded
(a normally docile) Tailorcraft with rear CG and couldn't keep it on the
runway. Anyway, moving the wheels forward without some professional
study is questionable...

Mike Q200

Peter Harris wrote:
> Mike I think less likely to ground loop but the additional weight aft could
> fail the tail cone or tail spring.
> Peter
> _____
> From: Q-LIST@... [mailto:Q-LIST@...] On Behalf Of
> Mike Dwyer
> Sent: Tuesday, 25 March 2008 8:17 AM
> To: Q-LIST@...
> Subject: Re: [Q-LIST] Wheel location
> Moving the mains forward will increase the weight on the tail wheel,
> possibly increase the tendency to ground loop (more weight behind the
> wheel?) and make it harder to make a nice smooth wheel pant shape.
> Mike Q200
> Allan Farr wrote:
>> Since Q's are supposed to takeoff and land in a three-point attitude I
> presume there is no reason why the main wheels couldn't be positioned
> further forward so that the a/c would be less likely to tip onto its nose,
> especially when braking. I'm only talking about 1 or 2 inches. Any thoughts
> out there?
>> Allan


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