Thanks Bud for your usual excellent reply.
I have been in contact with Dirk who has indeed suggested a replacement
blade of 64" and been most helpful but the issue remains, can I fit a 64" to
a classic mono. The LAA have provided me with a spreadsheet of calculations
to determine prop tip clearance at Max AUW which I will carry out but they
were unable to find out easily if any other classics were operating with a
64" prop so this is why I asked the community if anyone was operating with
one.
Thanks for the pointer to your website I will certainly have a look.
Thanks
Mike
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of
budyerly@msn.com
Sent: 28 December 2021 16:44
Subject: Europa-List: Re: Propeller Sizing
Mike,
My website has how to select a prop for your Rotax.
The 62 inch Warp Drive Taper blade is fine for most 80HP Rotax powerplants.
The Rotax 912ULS 100HP has significantly more torque and the 62 inch tapered
blade is not very efficient. My US folks were very disapointed with trying
to use this short tapered blade on the 912ULS in both the Airmaster and the
fixed pitch versions.
The blade angle will be quite high and takeoff will be shortened, climb will
be less and the cruise will be about 5 knots slower. The 80HP Rotax won't
spin a wide chord 64 inch without lugging the engine down. There is just
not enough torque. The tip at takeoff is not able to bite for good
performance.
The LAA recommendations is for the Warp Drive Standard (wide chord) blade of
64 inch for the Europa (which limits the length for the airframe to 64
inches) and was the standard Airmaster for a number of years. The 100HP
Rotax has the higher torque and can spin the wider and longer props with
authority.
Also available for the cost of a blade change is the Sensenich high speed
blades. Whirlwind has a blade but due to Covid lockdowns in California lead
time is many months. Sensenich and Warp Drive are made in free States so
production and labor issues are not a major problem for delivery at this
time. Airmaster will build you up a set of blades and ferrules ready to
mount. It will cost you but it is worth it.
Contact: Dirk Oyen
Oyen CTR (Europe Sales and Service)
Hemelrijk 61
Heusen-Zolder
Limburg 3550
Belgium
E: dirk.oyen1@telenet.be
M: +32 477 25 80 28
Website: www.propellor.com your European Airmaster Dealer. He has the
experience you will need to draw on in the UK (See the Airmaster Contacts
section for resellers.)
I have been happy with all the US manufactured blades in the Airmaster Hub.
And NO, you personally can't change the blades yourself.
Best Regards,
Bud Yerly
US Airmaster Dealer
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