Bud, Possibly the earlier versions of the SR3000 were 1600mm but my more
recent SR3000 N W comes with its certificate stating 1625mm, or 64 ins
as corrected by Paul. Regards, David
On 2021-12-29 22:42, Bud Yerly wrote:
> David,
>
> The Woodcomp has a larger twist hence it varies in exact length at the
> props are made from 1600 (63") to 1738mm (68"). Woodcomp uses a
> 1600mm blade for the Europa on their SR3000. On the Airmaster, the
> actual blade length will vary from the 64 inch maximum based on the
> production mold used down slightly after production. For instance, at
> Woodcomp they don't cut a 1700 mm prop down to 1600. That is a
> different mold so measuring the prop provided will not always be exact.
> 64 inches maximum meets the criteria for the UK and US with the black
> rubber block (as the regs are basically the same). Europa 2004,
> Airmaster and I have supplied many props (even fixed pitch) at 64
> inches per the LAA. (Let's face it, it is only an inch longer at the
> tip than yours.) The Europa Club website indicates that the Airmaster
> was considered to be the "standard" for the Europa. They are all
> nominally 62-64" maximum length. Unfortunately, the Europa Factory POH
> from 1998 still says 62 inches in the performance numbers because the
> original engine was the 912. Those figures are based on the narrow
> chord blade. Note, from my reading of the original test flights the
> fixed prop was set to a takeoff static RPM of 4000 for cruise and 5500
> for takeoff for testing like most Rotax powered kit planes trick us
> with. Note the tip is really set high at 21degrees for the 912S. The
> 912S with the wide chord give better performance from takeoff to
> cruise.
>
> I'm forced to say that all our 64 inch props are not exactly 64 inch
> blade lengths after mounting in the rotating barrel of a constant speed
> prop. It seems there are no absolutes in aviation. By the time the
> blades are ground to length, shaped and balanced, each prop is slightly
> different in length.
>
> Best Regards,
>
> Bud Yerly
>
> From: owner-europa-list-server@matronics.com
> <owner-europa-list-server@matronics.com> On Behalf Of
> davidjoyce@doctors.org.uk
> Sent: Wednesday, December 29, 2021 3:47 PM
> 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 [1] 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=====================
Links:
------
[1] http://www.propellor.com
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