Feedback on Aymar-Demuth Propellers ?

[humptybump]

Originally Posted by dealfair

I bought one from Mike Demuth in late 2005 and put close to 200 hours on it before doing a refurbishing job on my -4. I have a 3 blade Catto I'm going to try out.

I hope you will report back on how the switch from the Aymar-Demuth to a 3-blade Catto performs. I personally am very interested as this is exactly the switch I have been contemplating (and mostly for the same reason

[petersb]

Have flown 1600 hours the last 11 years with a Demuth 68 x 74 prop. Static RPM 2350, climb RPM @ 130 mph 2450. Normally runs 300 RPM above manifold pressure at lower altitudes. Runs 2750 @ 7500 feet TAS 205mph
Tried another prop that ran more square, however, would not produce the same top speed.
Prop is painted wood. Cannot find a better overall match

Peter

[gasman]

Originally Posted by petersb

Have flown 1600 hours the last 11 years with a Demuth 68 x 74 prop. Static RPM 2350, climb RPM @ 130 mph 2450. Normally runs 300 RPM above manifold pressure at lower altitudes. Runs 2750 @ 7500 feet TAS 205mph
Tried another prop that ran more square, however, would not produce the same top speed.
Prop is painted wood. Cannot find a better overall match

Peter

For this post to be useful, we need to know A/C type and motor...............

I got RV6 from your profile________________

[RonRV8]

I purchased a new wood/composite prop from Mike Demuth about a year ago. Beautiful craftsmanship. Runs smooth. I am very satisfied.

Ron

[rvator51]

I have been using a Demuth prop since 2002 on my RV-4 after my Props, Inc. propeller failed in flight. Real happy with its performance.

[petersb]

Originally Posted by gasman

For this post to be useful, we need to know A/C type and motor...............

I got RV6 from your profile________________

Yes , aircraft type is RV6 with a Lycoming O-320-D2J of 160 Hp. The engine by the way has 4000 hours since overhaul, compression 78/80 on all cylinders, normal oil pressure, burns 1 litre per 10 hours and still has the same static rpm as it did when I bought it at 2300 hours.

[badmrb]

I had one on my RV6a that performed well ..... Until it failed in flight. Chucked a big wedge piece from one tip. Cant tell ya the reason, but it does wake you up.

[ratc]

I may have had some Mis-Information but I was told by a fellow builder here in the UK that Aymar-Demuth had stopped producing propellers at the end of 2010!
Can anyone throw some light on this? If it is wild rumour I'll set the record straight!!

[pierre smith]

Originally Posted by petersb

Yes , aircraft type is RV6 with a Lycoming O-320-D2J of 160 Hp. The engine by the way has 4000 hours since overhaul, compression 78/80 on all cylinders, normal oil pressure, burns 1 litre per 10 hours and still has the same static rpm as it did when I bought it at 2300 hours.

4000 since overhaul! Incredible! I hope it's not a misprint because that has to be a new record. I've personally seen two go 3,000 hours but 4,000..amazing.

Best,

[caryr]

I put a previously flown AD prop on my O-360 RV7 in 2003.

I just replaced it last year with another one.

Good performance and smooth.

I had refinished the old one several times and it had a small crack in the wood grain.

It is retired and decorating the hanger wall presently.