REFLECTOR:Keeping the ! out of Expensive Propellers
reflector@tvbf.org
reflector@tvbf.org
Mon, 02 Jun 2003 07:03:00 -0700
1) Rolling mag check.
2) Use minimum power in ground operations. For example, when after start,
when you just start your taxi, barely crack the throttle enough to start
rolling. Once you're rolling, add more.
3) While taxiing, try to never come to a full stop until you're where
you'll shut down.
4) As mentioned elsewhere, start your take off roll from a rolling taxi
5) When you start your takeoff roll, don't use full power till you're up to
40 mph or so.
6) Put a fender on your nose gear.
7) Do you have a speed brake? If so, keep it extended on the ground at all
times till you're on your take off roll.
At 06:37 AM 6/2/03 -0600, you wrote:
>No experience with non-paved operations in a pusher, so just some ideas.
>
>1.) Go for a shorter blade? As I understand the vortex generated by a
>prop, a couple inches shorter reduces the problem a lot.
>
>2.) Try an IVO prop if they make one for 300 HP. Their blades are pretty
>tough.
>
>3.) Always land and taxi with the speed brake down if he has one, I do.
>
>Do all Chuck said except for that dead stick thing! ;-)
>
>To minimize rock damage on take off I always try to take off from a
>rolling start. I finish my runup(He's doing this in a very clean spot
>right?), I roll out on the runway and don't stop, just continue to slowly
>apply power, it takes a couple hundred feet before I'm at full power and
>rolling about 15-20 knots.
>
>As far as sweeping the runway, I think sweeping the first 400 to 500 ft
>would eliminate most of the damage.
>
>Scott
>
>
>
>Chuck Jensen wrote:
>>I assume the tarred aggregate is what we refer to as a "stabilized surface";
>>kind of half way between a hard gravel road and asphalt. Basically pea
>>gravel with tar incorporated and rolled. An excellent and inexpensive road
>>for cars but allows a lot of aggregate to be dislodged which becomes coarse
>>sandpaper for the prop. Things to do?
>>1. See if they will put a seal coat on the runway and ramp after using
>>a tractor boom to remove as much of the loose materials as possible. Of
>>course, if you are eating up MT props, pretty soon you could afford to seal
>>coat it yourself.
>>2. If they won't seal coat it, at least see if they will run over it
>>with a street sweeper to remove as much of the loose materials as possible.
>>3. During taxi use the absolute minimum of power; not easy with the
>>differential braking. During take off, apply the power very slowly
>>(assuming you have lots of runway) to avoid creating a 200 hp vacuum cleaner
>>which sucks up all the pebbles and rocks into the prop.
>>4. On landing, always turn the engine off 1-2 miles out and dead-stick
>>it in.
>>I'm unaware of any real design things you can do. You can minimize it by
>>how you operate the engine/prop on the ground but that's about it.
>>Finally, if you prefer to continue replacing just props instead of the whole
>>airplane, #4 can best be discounted.
>>Chuck
>>27GV
>>P.S. Since I don't have extensive legal fees budgeted for the current fiscal
>>year, please ignore #4!!!!
>>
>>
>>-----Original Message-----
>>From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On
>>Behalf Of Greg Poole
>>Sent: Monday, June 02, 2003 4:41 AM
>>To: reflector@tvbf.org
>>Cc: Leon Howe
>>Subject: REFLECTOR:Keeping the ! out of Expensive Propellers
>>
>>G'Day All,
>>.....Still waiting in the wings down here looking for clear evidence of
>>success of established means for keeping rocks etc out of pusher propellers.
>>Despite all precautions, have all but trashed two MT propellers for 40 hours
>>use in the XL we built down here. As previously indicated, when you
>>amortise the cost of a prop. this makes landings very expensive! (most
>>strips down here are tarred aggregate rather than concrete).
>>The owner of the XL - Leon Howe, has asked me to again ask for what any of
>>you blokes have done to get around this - diagrams, pictures, descriptions -
>>all accepted without complaint!
>>Kind regards,
>>Greg in Sydney.
>>
>>----- Original Message ----- From: "steve korney" <s_korney@hotmail.com>
>>To: <reflector@tvbf.org>
>>Sent: Thursday, May 29, 2003 5:02 AM
>>Subject: Re: AW: REFLECTOR:Help me buy a house...on an airport
>>
>>
>>>Landing on a airport that is less then 3000 ft. long is not a good idea in
>>a
>>
>>>Velocity...If you are an experienced pilot with lots of confidence then
>>OK,
>>
>>>try it...But, I for one would caution anyone who tries to be very careful
>>>about brakes, nose gear, main gear, debris on strip, density altitude,
>>strip
>>
>>>condition, on and on...These aircraft are not designed for short field
>>take
>>
>>>offs and landings...
>>>
>>>My $.02
>>>
>>>Your mileage WILL vary...
>>>
>>>
>>>
>>>Best... Steve
>>>
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>
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