nels

Has the plane ever had a gear up. If so you might check the prop diameter. The prop may be ground to the min diam or less. Or the wrong prop.

I don't own a C model but have a few ideas, only ideas, nothing concrete. I do think it is a fuel delivery problem to the pump or at the pump not from the pump to the engine. At 10k ft the outside pressure is about 10 psi not 15 psi as on the ground. The air pressure outside must push the fuel to the pump before the pump can pump it to the carb. If the vent in the tank is obstructed the pressure in the tank could be reduced even further than 10 psi, maybe a lot further than 10 psi. If you have a leak in the filler cap "o" ring or you have a leak at the top of the wing skin into the tank the low pressure on top of the wing will also be seen inside the tank. This would also be seen during cruise but while in climb you could see an awful lot more fuel being drained from the tank that need to be replaced with air at the same rate. The fuel does need to go up hill to get to the fuel pump ( I think ) which means there must be more pressure on the tank side or in the tank than the intake side to the fuel pump. Also, and as I said I'm not a mechanic and not familiar with C models, but typically there needs to be a vent hole in the fuel pump housing above the diaphram which allows the pump to deliver fuel at the same rate no matter what the outside pressure might be. If the hole is plugged or inadequate, maybe the pump just starts delivering less fuel which would be lower pressure. Just some ideas not suggesting it's the cure.

I thought if I were to double up with hearing protection I would do the same thing, off on take off and landing but on all other times. I am able to hear the warning horns with my active headsets but they are not at all pronounced. I am considering having the horns connected to the headsets per another forum post several weeks ago.

So, is there any advantage to use noise canceling on top of Halos?

That sounds like a good idea. Are the Halos noise cancelling? What about the BoseQC15's? Thanks for all the input from all. It has been enlightening.

You know, I kinda thought the same thing but I'm not so sure anymore. I don't shoot, when I travel in a car I use ear plugs, I don't listen to loud music; I'm just careful about my hearing. I did work in an industrial environment for 30 yrs and I know that took its toll but I'm trying to maintain what I have left. I think hearing loss is one of those things that creep up on you and all of a sudden you realize you can't hear the birds in the morning or the crickets at night. 90 db will damage your hearing. An eight hour day of that would be insane. I think they limited noise to 80 or less when I was still working and it did it's damage to me. Don't take it lightly, when it's gone it is gone.

I have a pair of newer Light Speed noise canceling headsets and I wear them religiously when flying. I believe this technology came out of our military to combat low frequency noise such as explosive blasts, engine noise etc. I'm wandering if they are giving me a false sense of security as far as hearing loss? I notice they are very ineffective when turned off if you were comparing to a good set of non cancelling headsets. Are they just cancelling the lower frequencies and letting the higher ones go unchecked?? I noticed a change in my hearing recently quite by accident. I could no longer hear the shower running in the bathroom when in the next room. Not meant to be a joke but that frequency is probably close to the air rushing past the windows of my plane at speed? I guess I'm wondering if ear buds under a good set of headsets would be better. I like flying but I love hearing. Anybody else concerned or have a better idea.

How many hours have you put on the plane since purchase?

I agree with Dave. I was going to say about the same thing. It is a buyer's market so if you sell yours cheap or at a loss, you should be able to buy another at a good price in turn.

Mike, it would be interesting to see the install cost.

Mike, did you install it or have it done? From what I see, these are pretty pricey; do they ever run specials? What is the cost of install? Sure looks like a good item to have.

I've noticed with the noise canceling headsets on it is difficult to hear the gear warning and/or the stall warning. I think there is a system that will put these warnings through the headsets? If so, where are they available and what it required to install?

I thought about it and you are right. Not intentional but might be perceived as fact. So, I deleted it. By the way, I own an E model. For what it's worth, I also collect and restore old supercharged Studebaker's. A far cry from a K Mooney but similarities in induction systems to some degree.

Thanks Clarence. Makes sense.

That's an odd response! I'd like to know how and why it works as it does and I would imagine the originator of this thread would like to know also. Not trying to step on any toes, just trying to learn something. And if FlyWalt is correct saying there are two different procedures from the early model to the later then what do you have to say? Again, I could be wrong but wasn't there an induction change in that model in 1983?

I didn't realize the two pumps were purposed to deliver different flow. I was assuming they delivered different pressure. I'm really not familiar with the turbo Mooney as such. I do know a supercharged engine on the ground that has a mechanical pump delivering say, 6 psi to the induction system, will only run up to 6 psi boost pressure. Anything above that the engine will quite as the boost will start to blow the fuel back into the tank. I thought the turboed Mooney may have a high and low pressure pump to accommodate this type of problem at high altitude.

Interesting. Thanks

What tires are recommended: 4 ply, 6 ply or 8 ply. A fair amount of weight difference from one to the other. Any special tube? Plane is a 66 E model.

I know what you are saying but I guess it depends on your definition of engine failure. I think he is talking an engine still running but not correctly. I guess I don't understand the logic of high pump pressure for an engine not running versus low pressure for one that is running? Not being sarcastic but would like to understand.

Probably has to do with if the engine is running and turbo putting out boost. The pump does need to overcome boost pressure in order to deliver fuel.

Not sure how it works in other states but I think here in Ohio if you buy from the owner you pay no sales tax. If you buy from a dealer or broker you pay Ohio sals tax. That can add up to more than just chump change.

Mike, that is about what I'm thinking and that is probably about right. However, if you take a sampling of asking prices for E models and J models and add 15k to 20k to the E models asking price the E models don't equate to the average asking price of the J's. Maybe that method works using the actual selling prices.

That plane is on eBay now.

Well Ross, that is a scary looking bird but if it was closer to me I would take a hard look, that is if it could be bought very right, like well under 20k. I'll bet it is corroded beyond repair especially considering the lack of a cabin cover. I think I see dew on the inside of the glass which means its wet in there. It may only be a candidate for parts or it may surprise you and it could be brought back.