Vacuum Pump on a 150 Franklin?

NC74392

NC74392

New member
Can you add a vacuum pump to a 6A-150-B3? I've heard there's an adapter drive although quite rare.

One other thing- my crank has a hole in the end like a crank for a plane with a variable pitch prop. Has anyone ever heard of anyone running an oil prop on a 150 Franklin? Curious to say the least...
 
Franklin Service News N-19 dated 6/5/52 has info on the engine mods required for adding a prop governor. It requires that you have a certain crankcase casting or it can't be done.

I have a copy of an Ad from Trade-A-Plane in my files somewhere for an alternator that bolts on to the generator drive pad and has a drivre for a vacuum pump on the aft end. I spoke to this gentleman in 1987, he said it would fit a 14-13. He had no FAA approval yet and said a few had been installed under field approvals. I was very interested but broke at the time so I never followed up on it.
Ron
 
check out this site for some pictures of a Stinson with an alternator with vacuum pump drive.
Ron

http://www.hangar9aeroworks.com/Alternator/108Alternator.html
 
I wonder which prop they had in mind with the addition of the prop governor?
I love the Aeromatic, but until Kent Tarver can convince the FAA that his props are OK (they are), I am stuck with running a Klip Tip McCauley fixed pitch.
There's just so much POTENTIAL in this little plane I can't hardly stand it- the frustration with the FAA that is. :roll:
 
Be careful on what you install. I did an annual on a Stinson with a vacuum pump once, and it had the paperwork and an STC (previously approved). Upon further investigation, I found that it was a ONE TIME STC for a different airplane. So I called up the FSDO that had approved it and talked to one of the inspectors and he remembered it. It was a drive from a helicopter engine, and he said they had oiling problems and the reason that there never was a multiple STC issued, was that they only lasted a few hours at a time... just info for you...
John H.
 
My biggest worry isn't accessories- it's the propeller issue. Cruisair owners need either the Tarver props, or a good substitute. It would really suck if all the Aeromatic propelled aircraft were grounded because of some FAA issue with the prop. This is what worries me- an uninformed FAA issuing ADs without knowing what they're talking about.
 
I have talked to MT propellors at great length about producing a certified prop for a 165 for either a Bellanca or a Stinson. They don't think there is enough business and they are aware that Bellanca and Stinson drivers are about the cheapest people on the earth. After saying that remember I have had or still do own one. The price for an electric constant speed prop is about $7500.00 with spinner and electric controler. I figure that will stop anyone in there tracks. Then there is the problem of getting approval from the F.A.A. There is no constant speed prop or ever was available for the 150/165 engines. There was a Sensenich skyblade that was oil controled and a high cruise Aeromatic. Both some what controlable with an in cabin knob. Sensenich will not admit to have even built the prop, and everyone knows the story on Aeromatics. You can always buy sn STC to put a 180 hp franklin in your Bellanca but the plane is just not worth spending the money on. And the only prop that is legal to run is not supported by McCaully. The enigine is worth as much as the airframe. I am currently running an Aeromatic on my Bellanca and have had no problems from it. I seriously considered doing a one time STC or field approval on my plane to use the electric prop but I just couldn't justify sinking that much money in a prop.............. Greg
 
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