Today's Message Index:
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1. 02:36 AM - Fw: Falco list flop (Ian Ferguson)
2. 04:28 AM - Flop (Process Equipment International Pty Ltd)
Message 1
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| Subject: | Fw: Falco list flop |
----- Original Message -----
From: Ian Ferguson
Subject: Fw: Falco list flop
----- Original Message -----
From: Ian Ferguson
Subject: Falco list flop
Hello all'
It is necessary to have something to lalk about. How about the perennial u/c circuit
breaker problem.
This comes in two guises, the retraction pop, and the G-load pop.
The former is due to overload of the motor due to aerodynamic forces (are they
plus or minus), friction in the screw-jacks, especially that of the nose gear
which is specially prone to contamination by dust ect., contact of the nose gear
tyre with the screw jack and jamming of the screw jack nut on the universal
joint either directly or by forign objects trapped in grease. Does flexion
in the nose gear retraction linkage play any part? It is puzzling that that, (a),
the problem is intermittant, and (b), the doors seem to play little part.
There are those with no main gear doors who have problems, and I have met at least
one person who has all the doors and the high gear motor who says he never
pops a breaker. I have been having a good run in this regard since I gave the
jacks a particularly good clean. The upcoming summer dust may find me out again.
I avoid heavy grease on the jacks, using spray-on molybdenum chain lubricant.
I found that loading the nose-gear to around 2.5 G's would pop the breaker. Without
some modification the breaker will always pop in a loop due to flexion in
the nose leg retraction mechanism. George suggested a latching relay in the u/c
circuit as a cure. This is not hard to install, and almost cures the problem.
A gust before the up limit switch closes can cause a pop. I believe mounting
the up limit switch on one of the main gear legs would be a solution.
One of my first passengers was my LAA airframe inspector who is very keen on aeros.
The first thing he did was to roll and then loop. Coming in to land the gear
failed to extend, and he took it upon himself to manually extend the gear
just as I noticed the breaker. Without a thought I pushed it in giving him some
bruised knuckles.
Let's hear of causes and solutions to the breaker problem.
Regards, Ian Ferguson.
Message 2
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--> Falco-List message posted by: "Process Equipment International Pty Ltd" <rob@pei.com.au>
Hey George, Ian, Mike, et al,
Not much progress over the last few days.
It's been a combination of things . . . stuffing my face and drinking too
much would be the primary culprits.
Took my other half over to Rottnest Island for lunch today in the aero
club's Seminole . . . your typical $100 hamburger.
One of my buddys came along in his Glasair, just so he could pass us at
almost 200 knots . . . God, I hate showoffs . . . at least until I can be
one.
Because I'm nowhere near flying I'm afraid I can't contribute to Ian's
comments on gear problems.
I can, however, remind those who are flying of just how much fun you ONCE
had inhaling sawdust and sweeping the bloody hangar floor twice a day so you
could find that AN3 nut, washer, etc. that you dropped.
That's the limit of my knowledge at this stage of the project -
Cheers,
Rob
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