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  1. akflyer


    Ykes, how time gets away from us! I guess it has been alot longer that this project was shelved than I thought. At any rate, the guy that was going to build the plate never got around to it, so I turned it over to the machinist here at work and he is going to have it done for me so I can bring it home when I get off this hitch. It is time for this project to get moved up the ladder of importance as float season is right around the corner! hoping to have the engine bolted to a gear box and on the test stand this time home! If I get really lucky I may get a base line run completed so I will have something to base the performance off of for the stock versus the modified pipe that I will have to do to get it under the cowling. Should be a fun project and hopefully give me the results I am expecting!

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  2. IFMT


    I am wondering what are the real numbers for a 912 install on a mark IV. What is the real weight. What are some real performance numbers? Everybody likes slamming the subes but I'm wondering how much better the 912 versions really are.

  3. akflyer


    I gotta jump back in here.... I must admit, when Randy started his SuberAvid project, I really thought it was going to be a dog of a performer. When he first flew it, I had to throttle back to around 54-5500 to cruise with him as he had a fixed pitch prop and it was not real stellar on the performance. Now that he has the IVO IFA, I am running at 6000-6100 to try and keep up with him and he has to throttle back so he does not run away from me. He has no issues hauling two people, gear and gas.

    I think I may beat him off the ground by a hair, but he can climb and out cruise me all day long while sipping the gas.... It pains me to have to admit how good the SuberAvid does.. The kicker to this is that we are flying at Sea level at temps from -30 to maybe 80 above, so we get better performance out of the planes here than you poor folks do down there south of that other country in the middle :lol:

    :BC:

  4. EDMO


    Airplane Porn!!!

    She's on her own gear now. Next we build a new firewall and hang the engine...

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    New Grove "tubeless" wheels and double puck brakes....

    I'm interested in your firewall building - got to do mine when wings are finished.

    ED in MO

  5. EDMO


    I know he wants way too much. Thought about making him a counter offer. I highly doubt he will back of $6k though

    The link to craigslist is intriguing. 125hp Subaru engine? interesting. Still a heavy engine though which is the problem I'm seeing. no payload. can anyone elaborate on the turbo subaru engine? Very nice looking aircraft.

    I'm not up to date on T-Soobs - NSI had one years ago with 140 hp - Turbo adds weight and more to worry about.

    That engine is probably a LOT HEAVIER!

    One company I dont personally care for is Eggenfeldner - A friend bought one, sorry to say, and wrecked his plane because of it. I've heard other not-so-good reports on their engines and redrives.

    All the Soob engines after the EA-81 are heavier with their overhead cams. That's not good in our little birds.

    A point of history: The Soob EA-51 originally was an airplane engine, (EA=Experimental Airplane, I am told, but why didnt they say it in Japanese?), but the 50 hp was not enough, so they put it in a car. It evolved from there to the EA-71 and EA-81. It is based on the "Boxer" engine used in VW and old Porche, but used newer engineering and liquid-cooling.

    Ed in MO

    BTW: Continental, Lycoming, Franklin, and other opposed-cylinder "certified engines" are Boxer engines, but the required 150 hour part-throttle FAA certification is not nearly as tough to pass as the tests done on the Subaru engines running wide open for weeks on the test tracks.

    Mitsubishi and others made the planes for the surprise party at Pearl Harbor, December 7th, 1941 - Lest we forget!

  6. 1avidflyer


    Thanks, Ed, I did a bit more digging through my manual, don't know why I didn't see it allready, but I found the page that shows the tubes and all their pieces and lengths. Page F-6 in my manual. I'm going to google some of those parts and see what pops up. Thanks again, Jim

    Jim,

    I am not very good at posting photos - It looks like a standard Heim or Aurora fork end, with a 3/16 hole in it and about 3/16 between forks - The internal threaded part could be any size you choose, probably 1/4-28 or larger - I will see what the manual says, or if it just gives a part number.

    Ed

    The manual gives it as AN320-3. Well, DUH - thats the nut on the clevis bolt - No heim number found for the fork end - Just a KF part #.

    The threaded adapter that the ends screw onto are AN490HT11P for the front, and AN490HT8P for the rear - dont know why they have to be different? Evidently, you have to make the step-down bushing that goes between the tube and the adapter - Dont see why you couldnt make this as one piece?

    Parting Shot: The KF1 book gives the aluminum tube length as 106 3/8" and overall length, hole to hole, as 112 3/8, so it is about 6" shorter than my KF2..........ED

  7. 1avidflyer


    Something I'm leary of when I'm looking at an airplane add is when they say "new prop" Why would anyone replace a good prop and then turn around and sell the plane. I would then worry about a prop strike. Someone mentioned posting a wanted add on Barnstormers, I think that's good advice. If it's not up for sale 'oficially', it might give you a bit more time if it's a real good deal because others aren't racing there to beat you. Take care, Jim Chuk

    I'm leary of buying an aircraft I can't fly anyway. Might have a good engine but it doesnt get off the ground

  8. Av8r3400


    Airplane Porn!!!

    She's on her own gear now. Next we build a new firewall and hang the engine...

    post-36-13632322150738_thumb.jpg

    post-36-13632322194661_thumb.jpg

    New Grove "tubeless" wheels and double puck brakes....

  9. EDMO


    Thanks a bunch guys! That is really helpful. Ed, could you by any chance get a picture of that forked end on the tube? Thanks again, Jim

    Jim,

    I am not very good at posting photos - It looks like a standard Heim or Aurora fork end, with a 3/16 hole in it and about 3/16 between forks - The internal threaded part could be any size you choose, probably 1/4-28 or larger - I will see what the manual says, or if it just gives a part number.

    Ed

    The manual gives it as AN320-3. Well, DUH - thats the nut on the clevis bolt - No heim number found for the fork end - Just a KF part #.

    The threaded adapter that the ends screw onto are AN490HT11P for the front, and AN490HT8P for the rear - dont know why they have to be different? Evidently, you have to make the step-down bushing that goes between the tube and the adapter - Dont see why you couldnt make this as one piece?

    Parting Shot: The KF1 book gives the aluminum tube length as 106 3/8" and overall length, hole to hole, as 112 3/8, so it is about 6" shorter than my KF2..........ED

  10. dholly


    the same one listed before. The thing I don't like is the 1,050 max gross.

    what would the useful load be with the 912? 500lbs or so?

    Been listed and re-listed at least once IIRC. Must have issues.

  11. 1avidflyer


    Thanks a bunch guys! That is really helpful. Ed, could you by any chance get a picture of that forked end on the tube? Thanks again, Jim

    Jim,

    I have the builder manual for the KF1 - If you need more info, I can check it for you.

    Dougs photos look like what I have for the KF2, except the 1 and 2 used a fork end at the elevator.

    ED in MO

  12. Mendlerr


    the same one listed before. The thing I don't like is the 1,050 max gross.

    what would the useful load be with the 912? 500lbs or so?

    buying a project scares me too, im not looking to put time into an aircraft i dont have. im on the road to much

  13. Mendlerr


    haha funny story, i had called a gentlemen requesting pics of his aircraft and i just got them. just so happens to be the same craigslist aircraft link you guys just gave me. his add has no pics on barnstormers so i called

  14. EDMO


    Jim,

    I have the builder manual for the KF1 - If you need more info, I can check it for you.

    Dougs photos look like what I have for the KF2, except the 1 and 2 used a fork end at the elevator.

    ED in MO

  15. Mendlerr


    Richard, the owner of that plane is not realistic on price no matter what the performance. It should be a 85 mph plane with a 500-700 fpm climb. T/O and landing will be under 750' depending on the million other variables.

    The plane I posted to earlier is a fine example of what Doug was referring to. A well equipped, maybe visually challenged flying airplane with all the right parts present.

    I know he wants way too much. Thought about making him a counter offer. I highly doubt he will back of $6k though

    The link to craigslist is intriguing. 125hp Subaru engine? interesting. Still a heavy engine though which is the problem I'm seeing. no payload. can anyone elaborate on the turbo subaru engine? Very nice looking aircraft.

  16. dholly


    Jim, here's the exploded view from the builder's manual with all the part #'s and measures. I am also adding some pics of my P/P tube because the measures don't exactly match the book. I also see a comment in the margin of the instructions that was put there by the builder, which confuses me even more because it doesn't match the P/P tube he (I assume) fabricated. When you see the tip of the screwdriver pointing to a particular spot on the P/P tube or component, the measure starts from the mirror spot on the other end of the tube (ie., from center of one heim end bearing bolt hole to the center of the other heim end bearing bolt hole).

    Dunno if that helps or opens a can of worms! dunno.gif

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  17. Av8r3400


    Richard, the owner of that plane is not realistic on price no matter what the performance. It should be a 85 mph plane with a 500-700 fpm climb. T/O and landing will be under 750' depending on the million other variables.

    The plane I posted to earlier is a fine example of what Doug was referring to. A well equipped, maybe visually challenged flying airplane with all the right parts present.

  18. dholly


    If history is a guide, you will start seeing more For Sale ads pop up as winter passes. You could possible get a jump on the competition by posting a Want To Buy ad on Barnstormers, etc.

    Also, did you see this one on Craigslist? >>> LINK

    AIRCRAFT AVID FLYER - $19900 (PAYSON AZ)

    Avid heavy hauler, 125hp subaru turbo completely rebuilt,o hours, all new engine parts,perf cam balanced metal leading edge on win gs Rocky Mt. engine management panel radios mode c 3 blade prop airflow fuel injection dual mallory ing. dual batteries dual electric fuel pumps HD landing gear custom built trailer, folding wings, have all in process photo,s all manuals plane is ready to fly, aprox 300 hr on airframe need to sell asap !!
    1505 n langley (
    ) (
    )

    • Location: PAYSON AZ
    • it's NOT ok to contact this poster with services or other commercial interests

    Posting ID: 3581841353

    Posted: 2013-01-30, 8:53AM MST

    Edited: 2013-01-30, 2:16PM MST

  19. EDMO


    Hi Doug, If it would be possible to give me the dimentions of the tube, I might have somthing here I can use. Looks like aluminum in the picture?? Also, if you don't mind, a closeup picture of each end. Thanks, Jim

    Jim, I roughly measured my KF2 tube - 1" dia. aluminum, approx 112" long, with threaded adapter riveted in each end and sticking out about 1" each end - a 3/16 rod end, and a 3/16 fork end, making it total aprox 119 inches end to end. You could vary the adapters and adjust the tube length to match. The threaded ends were sticking out a long ways, IMO. I plan to change the fork on mine to 1/4" because of bolt wear at the elevator.

    I cant get to my KF1 tube now. Hope this helps.

    ED in MO

  20. Mendlerr


    so out of curiosity, looking at this aircraft:

    http://www.barnstormers.com/listing.php?id=705287

    what should I expect in regards to performance? I have a new weight and balance with the grove gear installed and the aircraft weighs in at 628.10 empty.

    14 gallon tank w/ optional 4 gallon header tank. Unsure of prop brand but it is new, not rebuilt with a balanced spinner.

    So using the W&B forms I was given for this aircraft, myself (solo) with full fuel and no baggage would only weigh 926.10 pounds with the CG well within limits.

    Any estimations on cruise, takeoff and landing distances?