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Old 01-18-2021, 09:34 PM
ExtraKatana's Avatar
ExtraKatana ExtraKatana is offline
Join Date: Oct 2009
Location: Broken Arrow OK
Posts: 217
Default Worn locking Pin?

I am a new (RV8) owner and I did my first four 3 point landings today. The first three were noneventful. The fourth, the tail wheel became full swivel. I did a zigzag down the runway as I was pinning the stick in my crotch. I did not use anywhere near full rudder as wind was down the runway and I had a high-time tail-wheel instructor in the back that re-affirmed it was not a hard landing. I owned a super decathlon for 200hrs last year and I realize the 8 requires quicker, smaller foot movements, it never did this. The owner told me (like it was a known problem and prior to this happening) sometimes the locking pin and spring gets gummed up. He lives on a dort/sod runway where the plane had been for 7 years. His premonition did not take long to manifest. Any hints or tips/tricks to keep that locking pin from popping out so readily? Any tell-tell signs that it needs replacement? The pin never did re-engage. Will dissasemble.

Last edited by ExtraKatana : 01-18-2021 at 10:10 PM.
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Old 01-18-2021, 09:51 PM
Taltruda Taltruda is offline
Join Date: Oct 2017
Location: Las Vegas, NV
Posts: 575

Every year you should disassemble the tailwheel and clean out the grease and dirt. The grease fitting does NOT get in there. There’s also information out there about maintaining them.. here’s a little..
You may be able to flip the steering arm, but you would be better off buying a new plunger and arm, as just a little wear makes a big difference in the way it locks up.
Las Vegas
RV-8 empenage finished 10-2020

Wings Started.. 11-2020
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Old 01-19-2021, 12:18 PM
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vfrazier vfrazier is offline
Join Date: Jan 2007
Location: Mount Vernon, IN
Posts: 1,307


Blake has the parts to replace the worn ones. They're inexpensive.
Vince Frazier
F1 Rocket and F4 Raider components
1-888-F1AIRCRAFT (1-888-312-4727)
RV and Rocket Accessories, Tailwheels, Tools, & More
1-888-8FLYBOY (1-888-835-9269)

F4 Raider - under construction
F1-H Rocket "Crazy Horse" - sold
RV-4 "Chief Pontiac" - sold in 1994, purchased in 2018
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Old 01-19-2021, 12:25 PM
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Sam Buchanan Sam Buchanan is offline
been here awhile
Join Date: Dec 2004
Location: North Alabama
Posts: 4,370

This is discussed every few months, here is a recent thread:
Sam Buchanan
Fokker D.VII replica
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Old 01-19-2021, 11:04 PM
Anon455 Anon455 is offline
Join Date: Dec 2020
Posts: 51
Default Force 842

Try using a dry moly lubricant like LPS Force 842 instead of grease or oil. 842 bonds with the metal (looks like dark gray paint) is very, very slick when it dries and reduces galling and collection of dirt and grass. Metal moving against metal under pressure?

Last edited by Anon455 : 01-22-2021 at 09:30 PM.
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Old 01-20-2021, 06:05 AM
n816kc n816kc is offline
Join Date: Jan 2005
Location: Winter Haven, FL
Posts: 273
Default new pin

they're cheap and easy, just like new again.
Kevin Crews
Bartow, FL
RV-6 'Woo hoo!'
2021 =VAF= donor
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Old 01-21-2021, 07:51 AM
algrajek algrajek is offline
Join Date: Jun 2006
Location: Boca Raton, Florida
Posts: 440

DO NOT use Lube on it! Also very lightly deburr the edges of the pin. AND keep an extra one in the plane somewhere. Also clean it very often.
Al "Nordo" Grajek
repeat offender
Now RV7A!!
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Old 01-21-2021, 03:56 PM
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 5,741

When you get it apart and read the flyboy document, you will understand how it works. I likely never fit very well, mine didn't and failed like yours in 20 hrs. A little filling adjustment and some deburring to prevent recurrence and mine has been happy for a couple of years. Annual ( yearly CI) and first cleaning coming up soon.

I was afraid it was going to be finicky but it's fine with adjustment knowledge.

Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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