Cody Stallings

The Hamilton Std Governors you see nowadays are pretty well all rebranded H-1’s as in Hartzell H-1. Your adjustment screw should be a 10/32 Filister Head, an normally 1/2 turn Yields 50 RPM

Anthony is speaking the truth. you have a very large blade angle increase as you transition from climb to cruise. Did the issue start after the propeller came back from O/H? Little trouble shooting for ya. Pull propeller control all the way out(engine off) an have yourself an 2 of the beefier ramp rats you can find an manually move all 3 blade together to High pitch. While doing so be mindful of any catches or rough spots in the actuation. If the Blade Preload is to tight on 1 or 2 blades, then you will have a bit of a blade tracking issue for a couple seconds till the larger adjustment is made. Once the big addition bit of blade angle is achieved then the smaller adjustments your Governor makes really aren’t detectable. In the photo you will see Round plates with a smiley face on the butts of the blades. Those are the pre-load place that are adjusted individually between the blades. If one is to tight it will allow the other two blades to move more freely yielding a slight blade angle issue for just a second. Once the angle is adjusted then the blades wind themselves back in sync

The 720 showed up to a Market that wasn’t in any way prepared for it. Not enough Queen Airs came off the production line. To the Duke question: You could strap a 720 or a P&W 1340 to the B-60 wing an still have to spin it 2900 for takeoff. The Duke has a very small diameter props(74in like a vintage Mooney), where as the C421 has 90in propellers. Diameter is everything when it comes time to takeoff, lack of diameter with a more aggressive blade angle makes speed in cruise which is one reason the Duke will Wax a Golden Eagle Now strapping the 720 or one of the 600hp Trace V8’s on a Duke would be really cool, the Landing gear STC would be a nightmare with the FAA. One would have to get some of those short Pitot tube tires that these youngsters have these days on the big 4x4 that never go off road.

Give me a shout tomorrow an we can get a game plan together. I have some propellers to deliver local in the am, but I should be back turning wrenches after lunch. 870-208-8882

It has been my experience owning an operating Mooneys. That a Can of 3M EC776 can be your friend in situations like this.

That should be the -16 McCauley blade. However, that blade isn’t looking good without Reduction in diameter. I know where a set of those blades are at Overhauled with no Mooney to call home.

Definitely wait till your isolators are installed before you balance your prop, you will be happy you did.

O2 is not always a PIA an it’s not always just at the FBO’s. When you operate in the thin air it is a must to have. If you are only occasionally up high Portable will cover the task. If it’s a very regular occurrence then a built in system is a must.

The Lord# J-12453-1 I just replaced the Berrys with lord’s 2 months ago.

Lol..... Maybe a couple time in the past..:)

Yes. The PCU will have its own bracket that is purchased separately. The 290D can utilize the Hartzell Governor bracket but you have to drill a couple new holes in it to attach to the Governor’s top Cap. Or you could spring for the McCauley bracket. Both Govs are by far superior to the old H-1. if you have a digital tach you will see what I mean. They lock into the RPM an there is very little variation if any.

No No, Governors aren’t that bad in price for a CS version. $1500-1700ish Just had to get one For my plane that is CS Feathering. I almost had a Stroke when my price was almost $4K Byam can probably steer you in the right direction, I don’t know anyone there anymore after Carl’s passing or I would make a call for ya. Baileys Propeller Parts in New Albany Indiana is definitely worth a call to.

Well having a front row seat to two prop Governor(67 F model several yrs ago, an agin In Rocket 2 months ago) failures this story sounds very familiar to my first one. My F Model had a Hartzell H-1 Gov installed, it was also known as the Hamilton Standard H-1 an was installed on every P&W R-985 an R-1340(Wasp Junior) in its former life before multiple O/H a being Retagged with a new Name. With the O/H procedure of just about anything aluminum in aviation is the Etching process. The part(Governor Main body) is dipped in a Nitric Acid solution to remove a layer of material to get to fresh metal an it also aids in the NDT process to follow. This process over time opens up clearance where internal oil pressure is very hard to maintain, so the gov will start to Internationally bypass oil. Especially with multi viscosity oils. In a nutshell it sounds like your Governor is bypassing. When I first started flying my former F Model it actually belonged to my employer at the time an it was used for AOG opts away from the Repairstation mainly, that being said it was his plane so we done things his way. He had a love affair with Aeroshell 15w-50 oil so that what we ran in it. Over a months time I noticed the blue knob had to come back further an further to keep my normal cruise RPM of 2450. This aircraft at the time flew 300+ hrs a yr so we knew each other very well. Bring this issue up to the Mechanic he said sounds like the Governor was bypassing so let’s fatten the oil up an see if that helps. Next oil change we filled her up with 100W+ an the problem went away till that summer. The problem had been identified an the owner would not put a Governor on it cause it wasn’t having issues anymore. Well that summer on a trip from DTO->7M2 she finally had to let loose. It wasn’t a fast failure, but over a 2.5hr flight every 15-20min it would rise 50-70 rpm. By the time I made it to the pattern at 7M2 the lowest RPM I could command was 2650 because it was bypassing oil internally. After a safe landing an bench testing of the Governor, it was Revealed it was only making 55psi where it should be in the 270-290 psi range. My Advice to you if you do in fact have a H-1 is to replace it with a PCU5000 or McCauley 290D. Both will require different cable mounting brackets but you will be glad you did.

Stepping down from a Mooney is against all things natural. Also be advised or pay close attention to some of the issues with the IO-550-N. I have had personal experience with two of them. Balancing many aircraft propellers annually I see many different shapes an sizes, but I have run into two SR22’s that would not respond to weight. In both cases the crankshaft ended up being the culprit.

Been observing MT Gurus doing Flight tests with a local Air Tractor 802 with same prop an same Turbine. I think the STC is complete now. The MT would outperform the Hartzell to 15K feet by 3 minutes. Both Props 118 inches, but the MT is much lighter an is of newer more advanced blade designs. That being said there is no chance I would want a MT on a Cropduster or a Close air support aircraft due to the fact MT’s don’t deal with Powerlines, Houses, Cars or small ATV’s that well. Hartzell’s will chew them up an get the pilot an plane back home.

Exactly!!! Change of Subject. What kind of Fuel Burn you guys seeing Taxing 100F LOP with Phillips 100AW an Aero Led Landing Lights?

C3YR is the vibrating prop just FWI

It’s about the P/N of the Hub itself, not so much the plane/engine it’s bolted to.

Lots of good information being exchanged here. No need to Cycle your prop to get warm oil in the Hub cause it will never get there. Forward of the Front main bearing in the engine the oil system becomes closed to in/out Flow. There is a known Calibrated leak in the front bearing as Gear driven pumps(governor) has to have some type of continuous flow. Why prop control was lost with hot oil? I really can’t say. The Governor could have excessive clearance on the oil pump side or the front main bearings calibrated leak may look more like a busted fire hydrant. Who knows, But something isn’t playing well with hot thin oil.

Lol....... Looked like Jock Straps on their faces. By far the worst Halftime show I have ever seen

Not to be “That Guy” but the F7693DF prop will make it in an out of a propshop more times that the F7698 due to the fact it’s a thicker beefer blade. Lots of width an Thickness on those blades.

Your Propshop may Carry the NYCO grease. If not, Give my shop a call Haley will get some headed your way.

If your prop orientation changed, I would say someone missed a short drive pin when installing prop. May want to get Mirror an like to see if one drive pin is pushed out of the crankshaft flange about 5/8 inch or so

Personally I would hang on to what you already have. It’s a great prop.