Today's Message Index:
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1. 06:03 AM - Re: KIS landings ()
2. 02:24 PM - KIS TR-1 Propeller ()
Message 1
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| Subject: | Re: KIS landings |
2/26/2011
Hello Hans Christian, Good to hear from you. You wrote:
1) "Is yours a P-TIP too OC ?"
Yes. My 68 inch diameter by 69 inch pitch Prince prop was purchased in 2001
for a total cost of $1509 US. It is referred to in the correspondence of
that time as a "composite" P-Tip and I can see a faint fiber weave pattern
showing through the gray paint so I assume that is fiberglass covering the
laminated wood core.
The carbon fiber props described in the present day Prince web site are
finished with a clear coating over the carbon fiber unless paint is
specifically requested.
2) "When I bought mine, Prince claimed that a P-Tip versjon would "act" like
a
normal version with 4inch or so larger diameter and same pitch."
Here is Prince's web site for quick access:
http://www.princeaircraft.com/
And here are his current claims for P-Tip and scimitar blade shape
performance:
http://www.princeaircraft.com/TheProp.aspx
OC
PS: I flew a rented TCM IO-240 B3B powered Diamond Katana DA 20-C1 airplane
for a few years while I was building my KIS TR-1. It had a gray painted
Sensenich prop and it took me several attempts to determine that it was
indeed a painted wood prop rather than a painted metal prop.
=========================================================
From: "Hans Christian Erstad" <hans-chr.erstad@c2i.net>
Sent: Saturday, February 26, 2011 2:38 AM
Subject: SV: KIS-List: Re: KIS landings
Hello OC
As I reported earler I usually get 2200 RPM static and 2800 WOT (and maybe
exceeding 2800 after a minute or so, but I never run wide open and 2800 for
longer times) at 2-3000' altitude
This is with IO-240A and Prince P-TIP with 62 dia and 68 pich.
(manufactured around 1997-1998)
Is yours a P-TIP too OC ?
When I bought mine, Prince claimed that a P-Tip versjon would "act" like a
normal version with 4inch or so larger diameter and same pitch. (I cannot
remember exatly what he said) So the only reason to have a P-Tip would be to
increase ground clerance and decrease tip speed. Less tip speed could in
theory result in less noise (one of the reasons I went for Prince and
P-Tip). In case someone is not familiar with the Prince term "P-Tip", it is
sort of a winglet, and I am sure Prince web site explain it all. (but have
not checked)
Regads
Hans Christian, TR-1 #032
Message 2
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| Subject: | KIS TR-1 Propeller |
2/26/2011
Hello Alfred, You wrote: "........ I'll be using airfields at 6000 ft AMSL
at temperature of 35 to 40 degrees C."
That helps me understand your desire / need for more takeoff / climb RPM /
power out of your engine - prop combination than I am faced with.
The Prince propeller selection Wizard is a bit puzzling because it has two
different propeller recommendations for what appears to be the same airplane
and engine combination.
A) If you follow the input trail of "KIS TR 1 IO - 240 - 125HP" you wind up
with a 68 X 69 propeller recommendation. (Which is what I have.)
B) If you follow the input trail of "KISS - IO 240 - 125 HP" you wind up
with a 62 X 68 propeller recommendation.
See here:
http://www.princeaircraft.com/PriceOrder.aspx
One would think that the 62 X 68 prop would be more of a takeoff / climb
prop than the 68 X 69 version.
Maybe a conversation with Lonnie Prince is in order to sort out and refine /
clarify the recommendation.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
PS: What part of the world will you be operating in with those field /
density altitudes and temperatures?
=============================================
From: "Alfred Prosser" <aprosser@teledynamix.com>
Sent: Saturday, February 26, 2011 9:09 AM
Subject: RE: KIS landings
Thanks for the info on your propeller performance OC.
Thing is, I have to rig my plane for operating at density altitudes of
10,000+ feet because I'll be using airfields at 6000 ft AMSL at temperature
of 35 to 40 degrees C.
That's a different kettle of fish altogether. Hence the need for every ounce
of power I can get out of the engine at take-off.
Regards,
Alfred
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