REFLECTOR: Speed Brake

[Richard Riley]

I agree, for a one time event a fender isn't worth it.

Start up on the cleanest area you can find.  Ease in the power as slowly as 
possible to get moving, and ease off a little once you are.  Don't stop 
once you're moving, if you must do a run up do it while you taxi.  Roll out 
onto the runway without stopping and go - again, ease in the power.

On a maintenance run-up I once saw vortexes form off the prop disk, sucking 
up little puddles of water.  And that was with my nose gear retracted - 
nose on the ground, prop raised.

At 12:06 PM 6/5/05, you wrote:
>John,
>
>For one time use from a grass strip, I wouldn't worry about it.  Yes, the 
>Velo, as all pushers, is an excellent vacuum.  My MT prop, after being 
>flown off a high quality FL grass strip, looked like it'd been sandblasted 
>with pebbles.  Easing in the power certainly helps, as does a fender, but 
>there will always be a potential for FOD.  The FL had a base of crushed 
>limestone, so while the grass was generally high quality, there was plenty 
>of FODder for prop-dusting.
>
>So, for non-routine ops from grass, I personally wouldn't worry about the 
>fender--just more weight and complexity.  But then, others may be more 
>particular.
>
>Chuck
>
>-----Original Message-----
>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On 
>Behalf Of John Dibble
>Sent: Sunday, June 05, 2005 2:50 PM
>To: Velocity Aircraft Owners and Builders list
>Subject: Re: REFLECTOR: Speed Brake
>
>
>I guess a fender is my best option.  I just need something temporary for 
>one time
>use.  I won't be retracting and travel distance is 6 mi.  Any suggestions 
>for the
>fender?
>
>John
>
>Richard Riley wrote:
>
> > At 11:01 AM 6/5/05, you wrote:
> > >Thanks, Scott.  My next question is if anyone has departed from a runway
> > >(grass strip)
> > >with some loose stones and how much damage was done to the prop.
> > >
> > >John
> >
> > Heck, John, I've destroyed a prop with a loose 10-32 screw I sucked up from
> > a dirty concrete parking ramp.   That's the reason I have a nosewheel
> > fender - it doesn't stop Prop FOD, but it reduces it.
> >
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