Today's Message Index:
----------------------
1. 09:06 AM - Re: Re: Sensnich ground adjustable prop on 912 (Gary Haley)
2. 09:48 AM - Re: Sensnich ground adjustable prop on 912 (Roger Lee)
3. 11:29 AM - Re: RotaxEngines-List Digest: No. of blades vs. prop diameter (John Goodings)
4. 02:59 PM - Re: Re: Sensnich ground adjustable prop on 912 (Gary Haley)
5. 06:43 PM - Re: Re: RotaxEngines-List Digest: No. of blades vs. prop diameter (FLYaDIVE)
Message 1
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| Subject: | Re: Sensnich ground adjustable prop on 912 |
Roger,
I have been following your posts for some time now on the Kolb list.
I am an ex Kolb driver and now have a Highlander with a 912S "fuel injected" and
a 74" Kiev.
I've talked to Sensnich about a longer "up in the 70's" ground adjustable prop
and they said they had one in development.
Do you know anything about it?
Gary Haley
Dry Creek Airport, Cypress, TX (TS07)
--- ssadiver1@yahoo.com wrote:
From: "Roger Lee" <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Sensnich ground adjustable prop on 912
Hi Chris,
I am in the process of testing 5 Sensenich props for Sensenich and run a 68" 3
blade on my plane. I set all kinds of props up. Give me a call and I'll be happy
to help you out. I can also help if you decide to purchase one.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357745#357745
Message 2
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| Subject: | Re: Sensnich ground adjustable prop on 912 |
Hi Gary,
I have not seen a prop fro Sensenich in the 70's. I am currently testing a couple
of 3 blades for them and a couple of 2 blades. Be careful about over propping
with a 74+" prop. You have to have the torque and HP to turn it with an efficient
pitch angle. You could get too long and have to reduce the pitch angle
to a point to be a poor performer. You may also get to much inertia out at the
tips for the 912 gearbox too.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357835#357835
Message 3
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| Subject: | Re: RotaxEngines-List Digest: No. of blades vs. prop |
diameter
We are currently using a 68" 3-blade GSC prop on our Zodiac 601HD with
R912S. We are happy with it, but the ground clearance is not great for
grass strips. I saw a recent reference to a Warp Drive 4-blade prop. If
we went to a 4-blade prop, by how much would the prop diameter be reduced?
John & Peter Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa/Toronto.
Message 4
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| Subject: | Re: Sensnich ground adjustable prop on 912 |
Roger,
Thanks for the reply.
I am happy with the Keiv and it's performance.
I was just looking for a prop that could be changed easily.
Gary
--- ssadiver1@yahoo.com wrote:
From: "Roger Lee" <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Sensnich ground adjustable prop on 912
Hi Gary,
I have not seen a prop fro Sensenich in the 70's. I am currently testing a couple
of 3 blades for them and a couple of 2 blades. Be careful about over propping
with a 74+" prop. You have to have the torque and HP to turn it with an efficient
pitch angle. You could get too long and have to reduce the pitch angle
to a point to be a poor performer. You may also get to much inertia out at the
tips for the 912 gearbox too.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357835#357835
Message 5
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| Subject: | Re: RotaxEngines-List Digest: No. of blades vs. |
prop diameter
John:
The rule of thumb for an aluminum prop is 2" per blade.
So, reduce by 2" going from a 2 blade to a 3 blade and another 2" going to
a 4 blade.
NOW! The pitch INCREASES 1" above MAX when going from a 2 blade to a 3
blade...
So, if you were at 60" of pitch on a 2 blade you go to a 61" on a three
blade and then a 63" on a 4 blade.
The other rule of thumb is: You will loose 50 RPM for every inch of
increase pitch and gain 50 RPM for every inch of decrease in diameter.
The ONLY final test is TEST - TEST - TEST.
Barry
On Mon, Nov 14, 2011 at 2:26 PM, John Goodings <goodings@yorku.ca> wrote:
>
> We are currently using a 68" 3-blade GSC prop on our Zodiac 601HD with
> R912S. We are happy with it, but the ground clearance is not great for
> grass strips. I saw a recent reference to a Warp Drive 4-blade prop. If
> we went to a 4-blade prop, by how much would the prop diameter be reduced?
>
> John & Peter Goodings, C-FGPJ, CH601HD with R912S, Carp/Ottawa/Toronto.
>
>
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