Today's Message Index:
----------------------
1. 07:28 AM - Re: VMax - KIS TR-1 (JOHN JACKSON)
2. 07:31 AM - Re: SV: VMax - KIS TR-1 (JOHN JACKSON)
3. 09:32 AM - Re: VMax - KIS TR-1 (Scott Stearns)
4. 01:51 PM - Re: VMax - KIS TR-1 ()
Message 1
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| Subject: | Re: VMax - KIS TR-1 |
Scott=0A=0AThank you for the link; I think the Elipse prop may be a bit too
'cutting edge' =0Afor our LAA here in the UK.=0A=0ARegarding my prop; it's
an MT 3-blade electric variable pitch unit with only 360 =0Ahours since ne
w.- I sent-it to an overhaul agency in the UK for its 6-year =0Acalenda
r overhaul and they inspected it and found some-extra works were =0Aneces
sary (replacing the blade ferrules and bearings)-which was over-and abo
ve =0Athe standard overhaul.- When I discovered the new estimate for the
completed =0Aoverhaul (=A34400), I told them not to bother as it was too ex
pensive and send-the =0Aprop-back to me.- However, they had already
-shipped it to the OEM in Germany =0A(without my approval) and I now unde
rstand that some of the repair works have =0Aalready been completed.- Aft
er a 6-week long email exchange with the overhaul =0Ashop, we've finally ag
reed a fee for their work to date.- However, the prop is =0Astill with MT
and I don't know when it will be returned - soon I hope!- Until it =0Ais
returned to me, I won't be settling their bill and I also don't know what
=0Astate it is currently in and therefore can't really give you an indicati
on of =0Aprice.- When I get it back, I'll decide on a way forwards and sh
ould be able to =0Acome up with a fair price.=0A=0AThanks for your interest
.=0A=0AJohn
Message 2
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| Subject: | Re: VMax - KIS TR-1 |
Hans Christian=0A=0AThank you for the information.- How long have you had
the P-Tip prop?- Have you =0Aexperienced any problems with it?- Have y
ou got-a wooden or carbon fibre prop?=0A=0AJohn=0A=0A=0A=0AJohn=0A-=0AI
have an IO-240 A in my TR-1 with a Prince P-Tip 62x68.- Full throttle gi
ve =0A2800 RPM and around-155 kts. 2500 RPM (7.5 psi fuel pressure that a
ccording to =0Aengine manual-should be 70%)-give 135-140 kts.=0A-=0AH
ans Christian
Message 3
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| Subject: | Re: VMax - KIS TR-1 |
Hi John,
The elipse prop is a bit wacky looking. If it were me i think i would just
have the mt prop fixed and keep it. A new prince prop for my airplane woul
d be $2400 US plus shipping. The airplane will be worth more at resale and y
ou might be surprised at the loss of takeoff and climb performance with the f
ixed prop. My two pence anyhow...
cheers,
Scott
Sent from my iPad
On Aug 13, 2011, at 7:28 AM, JOHN JACKSON <helixaviation@btinternet.com> wro
te:
> Scott
>
> Thank you for the link; I think the Elipse prop may be a bit too 'cutting e
dge' for our LAA here in the UK.
>
> Regarding my prop; it's an MT 3-blade electric variable pitch unit with on
ly 360 hours since new. I sent it to an overhaul agency in the UK for its 6
-year calendar overhaul and they inspected it and found some extra works wer
e necessary (replacing the blade ferrules and bearings) which was over and a
bove the standard overhaul. When I discovered the new estimate for the comp
leted overhaul (=C2=A34400), I told them not to bother as it was too expensi
ve and send the prop back to me. However, they had already shipped it to th
e OEM in Germany (without my approval) and I now understand that some of the
repair works have already been completed. After a 6-week long email exchan
ge with the overhaul shop, we've finally agreed a fee for their work to date
. However, the prop is still with MT and I don't know when it will be retur
ned - soon I hope! Until it is returned to me, I won't be settling their bi
ll and I also don't know what state it is currently in and therefore can't r
eally give you an indication of price. When I get it back, I'll decide on a
way forwards and should be able to come up with a fair price.
>
> Thanks for your interest.
>
> John
>
>
>
>
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Message 4
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| Subject: | Re: VMax - KIS TR-1 |
8/13/2011
Hello John, You wrote:
1) "Do you have any figures for your KIS with the P-Tip?"
I have a nominal cruise speed of 135 KIAS at 2550 engine RPM with about
7 gallons of fuel consumption per hour.
2) "Would you recommend a P-Tip?"
Yes
3) "Which variety have you got; wood or carbon fibre?"
All of the Prince propellers are laminated wood, but now the customer
has the choice of having the wood covered with carbon fiber or not. Back
when I bought my propeller my choice was plain wood or wood covered with
fiberglass. I chose fiberglass covering . More information here:
http://www.princeaircraft.com/
If I were to purchase now I'd go with the carbon fiber covering.
'OC' Baker Says: "The best investment we can make is the time and effort
to gather and understand knowledge."
===============
From: JOHN JACKSON
To: bakerocb@cox.net
Sent: Saturday, August 13, 2011 10:36 AM
Subject: Re: VMax - KIS TR-1
OC
Thanks for your response.
Do you have any figures for your KIS with the P-Tip? I was speaking
with Kieth Miller last night and he gave me some info on his IO-240
powered TR-1 with a coventional wooden prop. It would be interesting to
learn what sort of speeds you get with a P-Tip.
Would you recommend a P-Tip? Which variety have you got; wood or
carbon fibre?
Nothing from Alfred yet............
John
============
8/11/2011
Hello John, I am flying my TCM IO-240 B9B powered KIS TR-1 with a
Prince P tip prop. 68 inches diameter, 69 inches pitch. Seems to be a
good match, but obviously cannot perform like a variable pitch prop.
You wrote: "However, the prop designer wants to know the theoretical
max straight and level speed for the aircraft at full throttle."
Since theoretical implies a number arrived at by calculation rather
than measured in the air how does one calculate that number?
Alfred Prosser seemed to be pretty good at number crunching -- maybe
he can answer both questions:
A) How to calculate VMax for a KIS TR-1?
B What it is for a IO-240 powered KIS TR-1?
OC
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