Comment

Comment by Mark Sherman on March 3, 2014 at 11:57am

Greg.

How much was that Sensenich?

Comment by Dietrich Ulrich on March 3, 2014 at 6:23am

What I meant in my last mail is: the difference of performance between governing for constant speed,.. or manually leaving the prop-pitch setting for best take-off during the whole take-off run with a float plane.

(Just to find out if there is a significant difference)

Cheers

Dietrich

 

Comment by Dietrich Ulrich on March 3, 2014 at 6:11am

Hello All

I'm thinking about making a turbo conversion for the 912UL and Felipe sparked in me the following questions:

Does anybody have experience with using a pilot controlled variable pitch propeller with a 914, or a 912UL turbo conversion? Does it distract the pilot too much when manually adjusting for performance on take-off ?(float flying) and How much loss of performance can you expect if keeping the pitch setting for a set rpm on take-off?

 

Also, when measuring the prop-pitch, do you measure the angle at the very tip of the blade?

Last but not least:

Anybody have experience flying a CH701 on floats with a Rotax 912UL (80HP) and an in-flight adjustable prop?

 

I know...lots of questions..:-)

Thanks

Dietrich    

Comment by Volker on March 3, 2014 at 4:47am

Hi Everybody, thanks for all your great suggestions. You've confirmed what I've been thinking all along - 3 blade 70" warpdrive. It's good to be part of the zenair family. Volker

Comment by Felipe Fried on March 2, 2014 at 9:01pm

Especially with the 914 you'll loose out significantly on performance unless you use a constant-speed, or at least a pilot-controlled variable pitch propeller.  In my opinion this is relevant to any aircraft, not just to lower drag designs. 

One could argue that you really don't need all the performance available from a 914 on an airplane like the 701.  And the sensible answer would be "it depends on your flight profile."  And of course, why buy a 914 if you don't need one?  Certainly on a 701 the 912S with a properly pitched warp three blade provides fantastic agility if confined to moderate altitudes.  Warp blades are heavy but very strong.  Three of them put the inertial load at the high end for Rotax gearboxes.

On my 701/914, I use an Airmaster constant-speed with two Sensenich blades.  The two Sensenich hollow blades save a few pounds compared with three solid Warp blades.  My own flight profile is varied and quite demanding.  I have about 250 hours on this 701/914/Airmaster/Sensenich flown from short, high-altitude, grass strips, sometimes heavily loaded.  I've taken this airplane up to 23,000ft, and down to sea level.  Experience has shown this engine/propeller combination does a good job for my varied flight profile and high altitude.

Philip Fried

Comment by Larry Zetterlind on March 2, 2014 at 6:10pm

You can't go wrong with the Warp Drive. Had one 11 years on mine. Simple and effective. I had a three blade 72 inch with nickel leading edges. Ground clearance was good because it was amphibious. Larry Zetterlind

Comment by Greg Canen on March 2, 2014 at 4:55pm

 after discussing the matter with Roger at Zenith I purchased a 68" Sensenich 3 blade however I can not give you any performance data as my 701 is not flying yet.

Comment by buz heuchan on March 2, 2014 at 4:48pm

That should read ----- " from Sensenich " 

Comment by buz heuchan on March 2, 2014 at 4:46pm

I am using a prototype from built especially for the 914 ( they may be in production by now ) on my 914. Beautiful white prop.

It replaced a constant speed prop.

Comment by Bob McDonald on March 2, 2014 at 3:33pm

WARP prop 68 - 70 inches dia. 3-blade.

I use a WARP 3-blade 68" dia on my CH601HD

I use a WARP 3-blade 72" dia on my CH750.

• ‹ Previous
• 1
• 2
• 3
• Next ›
• Page