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graeme bird
Joined: 15 Jul 2010
Posts: 434
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 Posted: Wed Jul 25, 2012 10:07 am Post subject: Mono wheel up landing |
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For a very brief moment last night I thought my wheel was stuck up. I'll chock it up and check it all out but I have wondered what the best technique would have been. I doubt the prop would clear. I guess short grass and as slow on contact and as much on the tail as possible. Would the prop just smash up or would it take the engine off?
I guess that a sharpish pitch up would also encourage it down.
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_________________
Graeme Bird
kit4 (Wagstaff) TBD
Kit3 G-CLXU (Gregory) mono 914 xs Woodcomp
Kit2 G-PATS - (kesterton) Mono Classic 912 warpdrive
Kit 1 G-UMPY - Mono Classic/XS 912S, Woodcomp G(@)gdbmk.co.uk |
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davidjoyce(at)doctors.org
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| Posted: Wed Jul 25, 2012 11:11 am Post subject: Mono wheel up landing |
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Graeme, If the prop is going round you will break it and
very possibly damage the engine, so if it ever does happen
for real deliberately stop the engine on final approach to
protect the engine, and you just might be lucky and get it
to stop in the one blade up & two down position where you
can hope to avoid breaking the prop too. I once flew
through some rotor in the Welsh mountains and found that
the severe turbulence moved the joint in the gear lever so
that when I came to put the gear down the lever was about
1/4" from the detent. I flew away from the circuit to
consider my options, but found it actually yielded to
main force (pulling hard with my right hand whilst
thumping that hand with my left fist), but two points
worth mentioning:
1) If the plane is still flying properly go away somewhere
and at a safe height do your fiddling. You do not need
serious distractions at circuit height.
2) With time to reflect on it, I realise that it would
have been OK to land with it as far down as it was, as the
gear had reached its stop and the mechanism would have
been over centre, and with a hand on the knob to stop any
impact rattling it out of that position landing would have
been no problem
Regards, David Joyce, G-XSDJ
On Wed, 25 Jul 2012 11:07:24 -0700
"graeme bird" <graeme(at)gdbmk.co.uk> wrote:
| Quote: |
<graeme(at)gdbmk.co.uk>
For a very brief moment last night I thought my wheel was
stuck up. I'll chock it up and check it all out but I
have wondered what the best technique would have been. I
doubt the prop would clear. I guess short grass and as
slow on contact and as much on the tail as possible.
Would the prop just smash up or would it take the engine
off?
I guess that a sharpish pitch up would also encourage it
down.
--------
Graeme Bird
G-UMPY
Mono Classic/XS FWFD 912ULS/Warp drive FP
Newby: 35 hours
g(at)gdbmk.co.uk
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rlindsa2(at)san.rr.com
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| Posted: Wed Jul 25, 2012 10:19 pm Post subject: Mono wheel up landing |
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I can tell you what happened on an unintended wheels up landing on a runway
in an XS monowheel with a two bladed Whirl Wind prop. Power was at idle and
tail wheel touched down nicely but blades of turning prop had to be replaced
(constant speed hub was OK--blades actually bent over then sprung back!)
Main wheel was forced farther up into the wheel well about two inches but
caused only rubbing damage. Minor damage to port outrigger fairing easily
repaired (no passenger). Main wheel was jammed beyond normal up position
but easily unjammed as aircraft was held aloft by hoist attached to engine
mount. Engine passed sudden engine stoppage tests.
Bob Lindsay
N77EU
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Richard Lamprey
Joined: 15 Jul 2011
Posts: 95
Location: Kenya
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| Posted: Thu Jul 26, 2012 12:06 am Post subject: Re: Mono wheel up landing |
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I landed gear up (monowheel classic). I lowered the gear, to slow down as usual, but forgot to lock. This was on a grass strip in Uganda, it had just rained, ground was soft. Touched down tailwheel first, then big bang, it all stopped in about 10 metres. Main damage, smashed prop. The gear thumped up into the wheel well, against the throttle box. Slight dent to exhaust, and the fuselage flap fairing one side slightly damaged. No damage to outriggers or flap hinges.
Lifted it up with engine hoist onto engine bearers, lowered gear and locked, wheeled it off strip. Then gearbox strip down as required, and check crankshaft alignment. All OK and saved by slipper clutch. Could have all been quite cheap if there was a Rotax agent nearby, but the nearest is South Africa, so getting him up to Uganda, repairs, hotels, airfares etc cost about USD 6000.
All best
Richard
Kenya
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