Mailing List flyrotary@lancaironline.net Message #17748
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Almost a Prop chop job was [FlyRotary] John's prop shop
Date: Tue, 22 Feb 2005 22:11:05 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message
Hi John,
 
Sorry to hear about that 1/8" of expensive material remaining on the runway.  Perhaps this will make you feel less alone.    A weekend or so ago,Saturday, Feb 12, I was flying back from a flyin up in Northern NC.  The FBO advertised he would reduce the price of fuel by the highest wind gust recorded by the AWOS before noon.  Well, after filling up on 19 cents/gallon cheaper fuel, I headed back to the air patch.
 
Back at the home airpatch, everything was "A OK" landing on runway 22.  Had just crossed a line of small trees sitting down in a gully about 100 ft from the end of the runway with 80 MPH IAS which is plenty for an RV.  Well within the 100 ft it took me to past that line of trees until I smashed down onto the runway marker - I very suddenly lost 20 MPH of airspeed.  AND they are correct!   without airspeed its just a rock.  I estimate I fell from approx 10-12 feet in a stalled condition - I KNEW it was going to hurt - but fortunately had the presence of mind of haul back on the stick to the stop.  I don't think it slowed the descent a bit - but it kept the nose gear AND my new $$ prop up in the air.  After the first impact (yes, john there was more than one), the aircraft rebounded to what felt like about 6 - 8  feet (witnesses of which fortunately there was only one other than myself) concurred with the estimate.
 
Recalling several RV nose gear aircraft which have flipped due to the nose gear hitting first and folding under, I kept the stick fully to the rear and gritted my teeth for the second impact.  Wham!   As the aircraft rebounded this time I felt/hear the rudder drag the asphalt due to my keeping the nose high.  The remaining bounces were minor and I rolled another approx 100 ft and turned around at the 300ft point sort of amazed that the aircraft was still on an even keel.
 
Damage inspection revealed that I had indeed scrapped the rear tie down eyebolt backwards into the rudder bottom (fiberglass fairing) and the rear 1/3 of the bottom of the rudder had the fiberglass abraded.   After my nerves settled a bit, I notice that the rudder while it had no damage(other than to the fiberglass fairing) it was harder than normal to move.  Close inspection revealed that when the rudder was moved instead of the eyebolt hinge pivoting around the attachment bolt - the bolt was turning.  Not good.  No other damage was evident.
 
I took off the rudder today and confirmed that the bearing races in the three eyebolts used as the hinges were all three frozen.  So today I replaced all three and the rudder is freely swinging again.  The repair of the rudder bottom is going to take a bit more time. 
 
But, I did manage to keep my $$ prop untouched and more importantly didn't flip the aircraft on its back. 
 
So sorry to hear about you trimming your prop - sounds like you had the nose a bit high also -but not necessarily a good thing in your canard -  but just remember things could have always ended worst.
 
My conclusion was that I :
 
1.  Had not allowed sufficient margin for the gusty wind conditions
 
2.  Trees and hangers that were on the upwind side of my touch down point may have perturbed or blocked the flow so that when I got within  their shadow (leeward side),where I lost considerable airspeed very quickly 
 
3.  I should have paid more attention to other pilots who have reported "down drafts" in that area (including one who reminded me today,  that he had touched down 20 ft short of the runway on that same approach with his wife on board (for her first flight with him) and he claimed he still had above stall airspeed when he hit the grass.  But, hey I had been flying out that airport for 4 years and never had encountered one (well, until Feb 12 that is {:>))
 
4.  Every once in a while everything stacks up NOT-IN-YOUR-FAVOR!
 
Remember if you can walk away "its a good  landing", if the aircraft will fly again "its a great landing", if it will fly again  without repair "its an Outstanding Landing"!
 
Best Regards
 
Ed A
 
 
 
 ----- Original Message -----
Sent: Tuesday, February 22, 2005 9:11 PM
Subject: [FlyRotary] John's prop shop

John (cut my prop back 1/8 inch today using the runway as a grinding tool)

 
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