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rparigor(at)suffolk.lib.n
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acrojim7534(at)YAHOO.COM
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 Posted: Wed Nov 11, 2009 4:11 am Post subject: Why do you not want to wheel land a monowheel? |
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The monowheel can NOT be wheel landed.... The flaps will blanket the elevator at about 50-60 knots. The plane will do a nose pitch down....
Jim Brown
--- On Wed, 11/11/09, rparigor(at)suffolk.lib.ny.us <rparigor(at)suffolk.lib.ny.us> wrote:
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From: rparigor(at)suffolk.lib.ny.us <rparigor(at)suffolk.lib.ny.us>
Subject: Why do you not want to wheel land a monowheel?
To: "Europa" <europa-list(at)matronics.com>
Date: Wednesday, November 11, 2009, 6:11 AM
Why do you not want to wheel land a monowheel?
http://www.youtube.com/watch?v=__QKkLBwIoQ&feature=related
Ron Parigoris | Quote: |
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pjeffers(at)talktalk.net
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| Posted: Wed Nov 11, 2009 6:29 am Post subject: Why do you not want to wheel land a monowheel? |
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Ron,
Believe me, don’t try it unless you like expensive excitement.
Pete Jeffers
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of rparigor(at)suffolk.lib.ny.us
Sent: 11 November 2009 06:11
To: Europa
Subject: Why do you not want to wheel land a monowheel?
Why do you not want to wheel land a monowheel?
http://www.youtube.com/watch?v=__QKkLBwIoQ&feature=related
Ron Parigoris | Quote: | | www.aeroelectric.com |
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11/11/09 07:40:00
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budyerly(at)msn.com
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| Posted: Wed Nov 11, 2009 7:54 am Post subject: Why do you not want to wheel land a monowheel? |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Ron,
The only guy I have seen do it is Ken Carpenter, and I believe he said, "Not for the beginner".
The main wheel is set 5-6 inches ahead of where the normal tail dragger like a Champ is (axel on the leading edge of the MAC). This position is due to fitting the retractable wheel into the fuselage. This geometry means that the slightest vertical component to your touchdown will cause the nose to rise abruptly. Not really a bounce but a pitch up caused by the forward gear and the moment arm from the gear to the center of gravity. Stab authority is decreased below 50 KIAS as the downwash of the wing and flaps hits the concrete and flattens out which is exacerbated by how close to the ground the plane is. This downwash change unloads the stab and results in an uncomfortable pitch down just before touchdown exacerbating the problem. The low speed requires larger uncomfortable control inputs, which leads to under or even over control. So as the nose pitches down, (remembering that expensive prop) just as you touch, the fuselage momentum forces the nose up. The pitch changes cause P factor changes which causes a yaw which drops a wing which causes an outrigger to touch which ends up in a go around (hopefully) or ground loop (typical). The U-2 has a similar problem. I believe the early USAF military Pilatus PC 6 was tough to wheel land with a full load, but tail changes and of course it's very high wing make it acceptable.
Keep it straight. Plant the tail wheel first. Keep the stick back and don't relax until in the chocks.
Bud
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