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Old 12-03-2018, 06:32 AM
paul330 paul330 is offline
Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,037

I was at Race for Rhinos in Botswana earlier this year and ended up racing very close to a 2-blade RV-10. The speed difference was about half a knot........

As Mike says, the ramp presence is huge. Also, my AP looks after 6 RV-10s - all the others have 2-blade Hartzells. He tells me my 3-blade MT is by far the smoothest and best sounding. It weighs less and doesn't have any resonance issues.

It's a minor hassle getting the bottom cowl off but easy enough once you've done it a few times. To me, it's a no brainer.......
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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Old 12-03-2018, 10:48 AM
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dmaib dmaib is offline
Join Date: Jan 2006
Location: New Smyrna Beach, FL
Posts: 1,338

Originally Posted by mike newall View Post
Errrrrrr -

We have an MT on our RV7. Titan ECI IO-360 with dual P-Mags and MT were completely happy with that.

I am enquiring from a weight and balance point of view because I understand that 14's are coming out tail heavy.

The MT is an exceptionally smooth prop, accelerates and decelerates way better than the Hartzell - may not be as fast, but we are not concerned with the last 5 knots.

I've had an MT on my RV-10 with an IO-540-C4B5 for ten years. I have one mag and one Lightspeed ignition. I live about 20 minutes from MT USA in Deland, FL. They've been great to work with over the years, including an overhaul I had done a couple of years ago. They've told me repeatedly that, even though the engine and prop are a certified combo, since I have a non certified electronic ignition, there is no warranty.
David Maib
RV-10 N380DM
New Smyrna Beach, FL
VAF Paid 1/02/2019

"In '69 I was 21, and I called the road my own"
Jackson Browne

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Old 12-03-2018, 02:10 PM
Jake14 Jake14 is online now
Join Date: May 2014
Location: Seattle
Posts: 223

At the risk of appearing clueless, are we talking about fixed pitch is CS MT 3 blade props?
RV-14A #140158 flying
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Old 12-03-2018, 03:23 PM
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mike newall mike newall is offline
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 1,752

Jake, no - 3 blade MT is a constant speed prop.

Carl - Pah !

Dave - I know the boys at Deland...... they like sippin' whisky I will PM you as our season starts, I get to MCO twice a month with work ( Thomas Cook A330)
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q

Donated in 2018
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Old 12-03-2018, 03:24 PM
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mike newall mike newall is offline
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 1,752

And Paul - You are most correct Sir !
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q

Donated in 2018
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Old 12-07-2018, 07:12 PM
dmattmul dmattmul is offline
Join Date: Dec 2015
Location: Spring Hill, FL
Posts: 46
Default Whirlwind

Iím almost to the point of picking my prop for my 14. Iím probably going to go with a 3 blade. Yes I understand the downside but the sound and look are a positive. 2 questions

1) MT is referenced here, any positives or negatives over a Whirlwind ?
2) Anyone have a picture of a 14 with a 3 blade ? Iíve seen tons of 10ís but not a 14.

Iím using a Lycoming 390 if that makes a difference.

Thanks and happy holidays and save flying !!
RV-14 QB building, Lycoming 390 Thunderbolt arriving Feb 2019, EFII-32 Ignition and Fuel, hope to be flying fall of 2019 !! Dues paid+ of course !!
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Old 12-07-2018, 07:21 PM
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DanH DanH is offline
Join Date: Oct 2005
Location: 08A
Posts: 8,547

New 3-blade MT here:
Dan Horton
Barrett IO-390
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Old 12-08-2018, 05:32 AM
Jpm757 Jpm757 is offline
Join Date: May 2013
Location: Sherman, CT
Posts: 382

I will vouch for the MT as being extremely smooth, even before balancing. I do not find any greater difficulty with cowling R&I. A nice feature of the MT is there is no required maintenance between overhauls, other than visual inspection. No grease gun required. Liberal field repair is also allowed using a good quality epoxy.
Performance wise, I run neck and neck with an O-360 RV8 with a 2 blade CS Hartzell. Prop IS pricey, but well worth the money.
RV6 #20477 completed 1991 sold.
RV7 #72018 N767T first flight 11/21/2017 200+ hrs.
IO-360M1B MT 3 blade, Dual AFS 5600 QUICK Panel.
Manual Flaps. KOXC Oxford, CT
1941 J3 Cub skis,floats.
2019 dues gladly paid.
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Old 12-08-2018, 08:44 AM
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Av8rRob Av8rRob is offline
Join Date: May 2005
Location: Rescue, CA. KROB
Posts: 266
Default Heres a pic of a -14A with a MT 3 blade

Rob Lasater
Rv-14 still workin
Paid nov 2018
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