New Hartzell Prop STC

[Greg Ellis]

I just saw a news story that Hartzell got STC approval for its new Outlaw prop for the Mooney M20 series.  It was a pretty vague news story but is this new news or old news?

[Pinecone]

Seems to be brand new.  Published June 30, 2025.

https://hartzellprop.com/press-release-mooney-m20-propeller-the-outlaw/

But doesn't say which models/engines.  Just that it replaces Hartzell 2 and 3 blade and MacCaully 2 blade.

And then there is the price.....

Maybe this means the composite 3 blade for the K models is not far behind.

[PeterRus]

20 minutes ago, Pinecone said:

Seems to be brand new.  Published June 30, 2025.

https://hartzellprop.com/press-release-mooney-m20-propeller-the-outlaw/

But doesn't say which models/engines.  Just that it replaces Hartzell 2 and 3 blade and MacCaully 2 blade.

From the article:

"Designed for enhanced performance and reduced weight, it is now available under a new Supplemental Type Certificate (STC) covering the Mooney M20 A through G and M20J models."

[Pinecone]

Thanks. I missed that.

So still waiting for them to come out with 3 blade for Ks.  They have been saying it is close for over 3 years that I know of.

[OR75]

price ? 

diameter ?

compatible with the IO-390 STC ?

[TaildraggerPilot]

Those that have vintage pre-J’s with the battery in the tail might have a big CG issues with this lightweight, yet very cool prop. I’m sure the price will be breathtaking. 

[PeterRus]

Yeah, I'd like to know the price please. 

[ProtoFly]

1 hour ago, TaildraggerPilot said:

Those that have vintage pre-J’s with the battery in the tail might have a big CG issues with this lightweight, yet very cool prop. I’m sure the price will be breathtaking. 

No biggie.  Just remove the Gill/Concorde Lead-acid battery and replace with an EarthX.  Between the prop and the battery, you'd pick up somewhere near 40 lbs useful load....

[Hank]

2 hours ago, PeterRus said:

Yeah, I'd like to know the price please. 

If you have to ask . . .  (Me, too.  )

2 hours ago, TaildraggerPilot said:

Those that have vintage pre-J’s with the battery in the tail might have a big CG issues with this lightweight, yet very cool prop. I’m sure the price will be breathtaking. 

Those of us with current Hartzell 3-blade props and battery on the firewall would enjoy the extra UL and expanded loading ability. Currently I'm at 970 lb.

[PeterRus]

1 hour ago, Hank said:

If you have to ask . . .  (Me, too.  )

Rumor has it at $24,425

[jetdriven]

GAMI has been putting them on cardinals for a few years now.  I dont know if it beats the McCauley 2-blade prop, which so far has been one of the best props still.   https://gami.com/props/props.php

 

here it was introduced in 2018 for 11K.  https://www.aopa.org/news-and-media/all-news/2018/january/24/hartzell-offers-new-propeller-for-cessna-cardinal-177b

Edited July 3 by jetdriven

[TheMooneyAnomaly]

Howdy!  As the press release may have revealed, the very first certified Outlaw has debuted on The Anomaly.  While it was on display on my plane at SnF, it was not yet fully approved and I was grounded during that display.  

The prop was installed over the weekend and I made my first flight with it on Tuesday.

My plane is now about 30lbs lighter, bringing my useful load to 1001lbs.

My CG went from 46.34 to 47.72, which is challenging if I have 4 people + a tiny amount of cargo or 3 people + a lot of cargo.  My battery is in the rear and now I could possibly load too far aft.  I did transition from a Continental battery to an EarthX battery a couple of months ago in anticipation of this change, though I still need to shift more weight around.

I'd like to explore moving the battery from the rear empennage to the engine compartment but have not found clear information on how to do that just yet.

I went from a 3 blade metal Hartzell to this structural carbon fiber exoskeleton Outlaw.  

The RPM response time is massively changed - near-instant RPM changes with the Outlaw.  

The airplane is smoother than ever.

Cruise performance was comparable to that of my 3 blade, which surprised me as I expected it to differ a bit.

I'll be doing further testing in the coming days! 

If anyone wants to see it at Osh, The Anomaly will be on display at the Lycoming booth all week.

[TheMooneyAnomaly]

7 hours ago, Greg Ellis said:

I just saw a news story that Hartzell got STC approval for its new Outlaw prop for the Mooney M20 series.  It was a pretty vague news story but is this new news or old news?

New news!  While this blade is based on one of the lightweight Raptor props for experimental airplanes (debuting less than 2 years ago, I believe), this is the first certified version.  The STC itself was earned a few months ago but there was still some conformity testing prior to final approvals a couple weeks back.  

I think there may only be one certified prop in the wild at this time - the one depicted on The Mooney Anomaly. 

Happy to answer questions though I'm still learning about the differences and other factors.

[MikeOH]

59 minutes ago, TheMooneyAnomaly said:

Happy to answer questions

Can you verify the price is nearly $25,000?

[KSMooniac]

1 hour ago, TheMooneyAnomaly said:

<snip>

I went from a 3 blade metal Hartzell to this structural carbon fiber exoskeleton Outlaw.  

The RPM response time is massively changed - near-instant RPM changes with the Outlaw.  

The airplane is smoother than ever.

Cruise performance was comparable to that of my 3 blade, which surprised me as I expected it to differ a bit.

<snip>

If this new 2-blade prop is not NOTICEABLY faster than an old, metal 3-blade prop on a 4 cylinder Mooney, then I would call it a massive failure.  I'm very curious/interested in this ever since seeing it a couple years ago, but I unfortunately just had to do an un-scheduled full overhaul of my MT and will be married to it for a while longer.  (hub and bearings were trashed).

Weight, response and smoothness are of course great improvements and majors selling points for this, and the MT prop as well.  I had high hopes that this would be the fastest cruising prop available to us, though.

[EricJ]

9 minutes ago, KSMooniac said:

If this new 2-blade prop is not NOTICEABLY faster than an old, metal 3-blade prop on a 4 cylinder Mooney, then I would call it a massive failure. 

There's not a lot more efficiency that can be squeezed out of modern propeller designs, so most of the innovations now are on reducing weight and reducing noise.   Don't expect anything to give you a significant increase in speed without somehow putting more power into it.

[KSMooniac]

I expect his old 3 blade metal prop is from the 90s or earlier... Long before the modern blade designs of this century. A big assumption on my part, though.

I would love to see real flight test data from the same plane with the metal 2 blade 7497 Top Prop and the new Outlaw version.

Sent from my motorola edge plus 2023 using Tapatalk

[Pinecone]

3 hours ago, PeterRus said:

Rumor has it at $24,425

That would be almost reasonable.

[jetdriven]

perhaps, but if a new C214 is 10k then why. 

[TaildraggerPilot]

19 hours ago, ProtoFly said:

No biggie.  Just remove the Gill/Concorde Lead-acid battery and replace with an EarthX.  Between the prop and the battery, you'd pick up somewhere near 40 lbs useful load....

That would open up a can of worms that I’d like to stay sealed up. EarthX has got a lot more proving and refinement to do before I even consider going down that road. 

[jetdriven]

2 hours ago, TaildraggerPilot said:

That would open up a can of worms that I’d like to stay sealed up. EarthX has got a lot more proving and refinement to do before I even consider going down that road. 

Not to mention the amp-hour capacity is half that of the standard rg35 battery.  

[1964-M20E]

I like the looks of the prop.  At the projected $25k it would need to increase efficiency to make it worth while unless your current props is trashed and you need a new one.   If it reduces noise then that power that was producing noise needs to go somewhere maybe speed or more effectively turning torque into thrust.  Also thee is  2,400 hour or 6 years TBO is that a hard line or is it a recommendation?.  Not sure if that applies to part 91 or not.

Different medium but I do remember many years ago when stainless props were becoming popular on boats.  The thinner blades allowed for less resistance in the water to the rotation of the prop and you could go with higher pitch and get better performance.

From the article. 

 

Key features of the Outlaw propeller include:

• Blended airfoil carbon fiber composite blades
• 2400-hour / 6-year TBO
• Replaces Hartzell 2- and 3-blade metal props and McCauley 2-blade props
• The lightest Hartzell option available for Mooney M20 aircraft

[jetdriven]

52 minutes ago, 1964-M20E said:

I like the looks of the prop.  At the projected $25k it would need to increase efficiency to make it worth while unless your current props is trashed and you need a new one.   If it reduces noise then that power that was producing noise needs to go somewhere maybe speed or more effectively turning torque into thrust.  Also thee is  2,400 hour or 6 years TBO is that a hard line or is it a recommendation?.  Not sure if that applies to part 91 or not.

Different medium but I do remember many years ago when stainless props were becoming popular on boats.  The thinner blades allowed for less resistance in the water to the rotation of the prop and you could go with higher pitch and get better performance.

From the article. 

 

Key features of the Outlaw propeller include:

• Blended airfoil carbon fiber composite blades
• 2400-hour / 6-year TBO
• Replaces Hartzell 2- and 3-blade metal props and McCauley 2-blade props
• The lightest Hartzell option available for Mooney M20 aircraft

TBO is not mandatory for part 91 operators. But six years makes the 2400hr moot anyway. It might as well be 9000 hours and six years. 

Edited July 4 by jetdriven

[Slick Nick]

Here in Canada we have a mandatory 10 year prop rule anyway, which means you’d effectively need to have this prop done twice in that time, regardless of the hours. For no tangible benefit in performance, I don’t see them selling any north of the border. 

[MikeOH]

How does one deal with nicks, and such, in a carbon fiber prop?  I wouldn't think filing the edge is an approved method