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Mark...
You should never EVER do high speed or "fast" taxi's in a plane thats not ready to fly. I would recommend strongly against this until Chris has his panel completed, everything troubleshot, and his inspection completed, and his phase 1 operating limitations in hand.
I've heard that the majority of high speed taxi accidents involve inadvertent flight.
Dave
Mark Steitle wrote:
You can fast taxi as long as you keep at least one wheel on the runway surface. The tower shouldn't have any problem with you doing a couple of fast taxis if things are slow. I did a lot of fast taxis in order to get a real good feel for the climb angle. I would accelerate up to the point where the nose wheel would lift off, then back off the throttle and hold it that attitude for a few seconds. It didn't take long and I had a real good image in my mind of what to expect on first flight. Just don't get carried away and run off the end of the runway. Yeah, I know, you've got 7k feet of runway. The end comes at you pretty fast.
Mark S.
On Thu, Sep 17, 2009 at 8:31 PM, Chris Barber <cbarber@bellairepolice.com <mailto:cbarber@bellairepolice.com>> wrote:
Good thoughts Mark. I think that I have not been going full rich
at cold start up....perhaps out of fear of flooding it. Of course
I suppose I could just as easily flood it by over priming. Your
way is correct as I remember it from Tracy's manual. Like I said,
I still need to develope the proper techniqes now that I am
hopefully moving past some other concerns.
Yeah, OAT may be the difference. It does get pretty hot on the
ramp. Usually I am able to get past 6000 without too much probems.
No, I have not done any high speed taxi runs. Just some "go-kart"
runs around the ramp. I do not have to contact EFD ground or
tower for that and I aways assumed I should have my airworthyness
signed off before I take 'er out to a real runway <g>
Other thoughts welcome.
All the best,
Chris
------------------------------------------------------------------------
*From:* Rotary motors in aircraft [flyrotary@lancaironline.net
<mailto:flyrotary@lancaironline.net>] On Behalf Of Mark Steitle
[msteitle@gmail.com <mailto:msteitle@gmail.com>]
*Sent:* Thursday, September 17, 2009 7:46 PM
*To:* Rotary motors in aircraft
*Subject:* [FlyRotary] Re: Progress report from Houston
Chris,
I know that each engine/installation is unique, I usually don't
have to prime even once when cold (summertime), and never when hot
(doesn't need the extra help igniting the fuel mixture). However,
I always go rich on the mixture knob (full rich for a cold
start, 2-3 o'clock position for a warm start). It always starts
within a few seconds of cranking. I would try priming less when
hot and see what happens. Also, I would check your idle mixture
settings. If it takes that much priming, it sounds like it may
tuned be a bit on the lean side. My take on your static rpm question is that OAT may be the cause
of the variations. Sounds like you've got enough to get off the
ground. Have you done any fast taxi runs? You've got plenty of
runway. Mark
On Thu, Sep 17, 2009 at 7:15 PM, Chris Barber
<cbarber@bellairepolice.com <mailto:cbarber@bellairepolice.com>>
wrote:
Oh, also, I am having a bit of trouble to get it to start when
hot. Seems to crank right up when cold, but I seem to have to
hold my tounge just right to fire it up when hot. I think it
MAY have to do with the different mixture and priming needed
when hot. It seems to like about six to ten prime shots when
cold, but may like more when hot....not sure yet. Annoying
though.....especially when trying to show off to the
curious....who heard the engine a few minutes ealier <g>
Thanks.
All the best,
Chris
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