QFA380
Topic Author
Posts: 2013
Joined: Fri Jul 22, 2005 4:38 pm

Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 4:54 am

Why do no aerobatics planes have retractable gear? I have never seen one that does. Wouldn't it help quite abit if the plane was more streamlined?


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2H4
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RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 5:01 am




Quoting QFA380 (Thread starter):
Why do no aerobatics planes have retractable gear?

Weight. Aerodynamics are comparatively less important, as aerobatic aircraft spend the majority of their time in low-speed flight.



2H4


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KELPkid
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RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 5:03 am

A Couple of guesses here:

The gear hanging out in the breeze helps generate drag (which can be a good thing in aerobatics...you might not want a plane that picks up speed in a hurry when you point the nose below the horizon). Also, a hydraulic pump (for a conventional single) would be an added, unecessary complication.

BTW, I can think of one common aerobatic aircraft with retracts (although it is ex-military): the T-34:


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ZBBYLW
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RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 5:09 am

Hey i have thought about this too. I think both the answers above are good answer but perhaps also the added stress of +/- 10 G's on an airplane with retractable gear would be a bit much and to strengthen them, the weight comes back into the picture. Also the thought like posted above off the added drag is very interesting indeed, but it just doesnt look as cool when doing a low and over.

Cheers Chris
Keep the shinny side up!
 
FredT
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RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 6:36 am

Weight for a very small benefit in the intended regim of flight is the main reason, just as stated above. No doubt about it. Complexity and cost would be two other reasons. Why mess with and pay for a gear retraction system when you get very little, if anything, in return?

Rgds,
/Fred
I thought I was doing good trying to avoid those airport hotels... and look at me now.
 
sprout5199
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RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 8:24 am

Quoting KELPkid (Reply 2):
The gear hanging out in the breeze helps generate drag

And if the need to overcome the drag arises, just put a bigger engine on it. I'm sure the aero pilots would say "hmmm bigger engine? Is good"

Just my  twocents 

Dan in Jupiter
 
QFA380
Topic Author
Posts: 2013
Joined: Fri Jul 22, 2005 4:38 pm

RE: Why No Retractable Gear On Aerobatics Planes?

Fri Nov 03, 2006 9:02 am

Thanks for all you replys, has cleared up something I have been thinking about for a while.

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