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  #1  
Old 03-24-2019, 09:21 PM
Rodney Rodney is offline
 
Join Date: Oct 2012
Location: Friendswood, TX
Posts: 74
Default MT electric propellers

Good day,
My O-360 has a solid crank so a conventional constant speed prop is not a good choice for me.

Wondering if anyone has installed the MT electric propeller?
And if so, what are your thoughts and if you remember, the price

Thanks

Fly safe
Rodney
RV-7A
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  #2  
Old 03-25-2019, 04:01 AM
FORANE's Avatar
FORANE FORANE is offline
 
Join Date: Nov 2011
Location: East TN
Posts: 586
Default

I have one with around 600 hours.
You will see the known typical benefits over fixed pitch such as better thrust in takeoff, ability to reduce rpm in cruise, noticeable braking effect if/when you want it, etc.
The MT I have is the 3 blade which as you may expect is very smooth; noticeably smoother than a 2 blade though I can't say it was much better than the 3 blade Catto I ran.
The MT I have is a little slower in cruise than the Catto I had, maybe 7-10 kts slower.
The MT has paint over the nickel leading edge which erodes with rain and personally I find it unsightly. The nickel leading edge has been excellent however for durability.
My MT is an older prop I bought with zero hours from a builder who bought it new but never installed it. As such I only paid a couple thousand for it. I have had to replace the P-120-u control unit at around $2,000 and the servo motor at around $1,000. I had it overhauled at MT Deland and within a few months of overhaul the prop suffered paint peeling off in sheets. I ended up having to have the prop stripped and repainted in under 6 months from overhaul.
Prior to replacing the control unit and servo it had a few occasions where I could not adjust the prop pitch in flight - it just remained in the pitch at time of failure.
The electric pitch change is slower than a hydraulic prop.
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Lancair 235/340
RV-9A (2013 - 2016)
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  #3  
Old 03-25-2019, 10:44 AM
Rodney Rodney is offline
 
Join Date: Oct 2012
Location: Friendswood, TX
Posts: 74
Default

Thank you for the info!
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  #4  
Old 03-25-2019, 02:22 PM
Capt Capt is offline
 
Join Date: Feb 2017
Location: Australia
Posts: 672
Default

Quote:
Originally Posted by FORANE View Post
I have one with around 600 hours.
You will see the known typical benefits over fixed pitch such as better thrust in takeoff, ability to reduce rpm in cruise, noticeable braking effect if/when you want it, etc.
The MT I have is the 3 blade which as you may expect is very smooth; noticeably smoother than a 2 blade though I can't say it was much better than the 3 blade Catto I ran.
The MT I have is a little slower in cruise than the Catto I had, maybe 7-10 kts slower.
The MT has paint over the nickel leading edge which erodes with rain and personally I find it unsightly. The nickel leading edge has been excellent however for durability.
My MT is an older prop I bought with zero hours from a builder who bought it new but never installed it. As such I only paid a couple thousand for it. I have had to replace the P-120-u control unit at around $2,000 and the servo motor at around $1,000. I had it overhauled at MT Deland and within a few months of overhaul the prop suffered paint peeling off in sheets. I ended up having to have the prop stripped and repainted in under 6 months from overhaul.
Prior to replacing the control unit and servo it had a few occasions where I could not adjust the prop pitch in flight - it just remained in the pitch at time of failure.
The electric pitch change is slower than a hydraulic prop.

Gee what a great report on yr MT prop, thanks as I've been thinking about swapping out my prop wth a MT but won't bother now.
Cheers.
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