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Message-ID: <4AB30340.5020400@gmail.com>
Date: Thu, 17 Sep 2009 22:49:20 -0500
From: Dave <david.staten@gmail.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Progress report from Houston
References: <list-3858098@logan.com>
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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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