Thanks Paul, it was indeed a typo. I meant as near as dammit 64". David
On 2021-12-29 22:21, Paul Mansfield wrote:
> I'm sure that was a typo, but 1625mm = 63.98".
>
> I have the same (LAA approved) blades on my 912S XS mono and the only
> factors I could think that would differ on a Classic would be engine
> (and therefore spinner) height and tailwheel length/positon.
>
> I'll measure my spinner tip height above ground tomorrow
>
> HTH,
> Paul M
> G-PLPM
>
> -------- Original message --------
> From: davidjoyce@doctors.org.uk
> Date: 29/12/2021 20:51 (GMT+00:00)
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Re: Propeller Sizing
>
> Mike, for what it is worth I have a Woodcomp 1625mm (=62" as near as
> dammit) prop on my 914XS mono. I am not aware of prop limitations
> differing between Classic and XS. I have always understood that this
> was the max size that the LAA would approve. The clearance is fine on
> hard runways, but on roughish grass strips you wouldn't want any longer
> blades than that, as you might find the tips getting stained green.
> Regards, David Joyce, GXSDJ
>
> On 2021-12-29 12:03, Mike wrote:
>
> Hello Tim
>
> Thanks, this is what I was after the only problem is that sadly for me
> you are in NZ and I suppose governed by different regs!
>
> Here in the UK we are subject to something called CS-VLA 925 (easily
> googled) which makes minimum prop clearance demands.
>
> However glad to hear that you are getting good results, what brand of
> blades are you using?
>
> Thanks
>
> Mike
>
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of timward
> Sent: 29 December 2021 10:45
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Re: Propeller Sizing
>
> Hi Mike,
>
> I have 64" prop blades on my Mono Wheel Classic #292. Prop clearance is
> not a problem.
>
> With the Airmaster CSU, Rotax 912ULS 100hp, it provides excellent
> performance.
>
> Upgraded to 64" from 62" after a prop strike, on recommendation from
> Airmaster.
>
> Cheers,
>
> Tim
>
> Sent from my iPad
>
> Tim Ward
>
> 12 Waiwetu Street,
>
> Fendalton,
>
> Christchurch, 8052
>
> New Zealand.
>
> ward.t@xtra.co.nz
>
> 021 0640221
>
> On 29/12/2021, at 11:29 PM, Mike <mike@nyumba.co.uk> wrote:
>
>
> 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
> To: europa-list@matronics.com
> Subject: Europa-List: Re: Propeller Sizing
>
> <budyerly@msn.com>
>
> 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
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=505507#505507
>
> <====================
>
> <sp; -Matt D=====================
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