REFLECTOR: fun flying

[Dennis Martin]

Great pics, Al and great to hear your auto conversion is working so well
now. Wish I had known you were in SLC so I could take a look at your strake
cooling setup first hand. I've got your pics and will apply them, but if you
come this way again, let me know so I can take you to dinner.

Best,
Dennis



On Fri, Jul 18, 2008 at 10:58 AM, Laurence Coen <lwcoen at hotmail.com> wrote:

>  Al,
>
> Thanks for sharing your trip with us.  I wanted to set your mind at ease as
> to altitude and O2 requirements.  Blood gas exchange takes place at body
> temperature which is constant.  Density altitude is pressure altitude
> adjusted for temperature but since the absorption of O2 into the blood is a
> function of absolute pressure and concentration at body temperature the OAT
> is not a factor. Pressure altitude is the true factor in this equation but
> indicated altitude is close enough.  I fly into Slaida CO where my son lives
> and to make sure I'm OK I use a pulse oximeter.
>
> Larry Coen
> N136LC
>
>  *From:* Al Gietzen <ALVentures at cox.net>
> *Sent:* Tuesday, July 15, 2008 10:19 AM
> *To:* reflector <reflector at tvbf.org>
> *Subject:* REFLECTOR: fun flying
>
>  I just returned on Friday from trip of about 2500 nm, including visits in
> Salt Lake City, North Dakota, and Boulder, CO.  Plane worked great, engine
> ran fine – even at density altitude of 16,500 over the Rockies west of
> Denver.  Typical cruise of 165 KTAS, and 9.5 ghp.  (I like my 20B rotary).
> Had good weather all the way.
>
>
>
> I learned that the standard Koch chart for runway requirement isn't a bit
> conservative for my airplane.  Taking off from Boulder (4000 ft) with
> density altitude near 8000 ft and full fuel didn't leave much excess runway.
>
>
>
> Photo 1 – Air Center of Salt Lake at Muni #2 (U42) were very friendly,
> helpful and accommodating. Spotless hangar where they put my plane with a
> jet and twin turbo.  (the plane was very happy there).
>
>
>
> Photo 2 – Crossing the divide around Rollins Pass.  I peaked at about
> 13,800 MSL, but density altitude was 16,400.  I was surprised to note that I
> was still climbing at 160 KTAS and 500 fpm and still had throttle to go. It
> occurred to me that the regs give O2 requirements based on indicated MSL,
> when density altitude must be more representative of O2 content. (Of course
> I wasn't above 12,500 more than a few minutes).
>
>
>
> Photo 3 – (sent separately due to message size restriction) speaking of
> EFIS; I've been very happy with my twin GRT screens.  They have reliable,
> functional; and the customer service great.  The right screen shows the map
> with terrain when flying relatively low around Boulder area. All that red
> terrain is higher than I was.
>
>
>
> BTW; I tried contacting Flight Watch on 122.0 three or 4 times on the trip,
> and never got a response. It is just me?
>
>
>
> Just sharing some of the things you do AFTER you finish building.
>
>
>
> Al (SE 20B RG)
>
>
>
>
>
>
>
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-- 
All the best,
Dennis
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