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  1. MACOWA

    Rotax 503 prop extension

    I have a 503 with a B gearbox and would like to use a 4" prop extension in a tractor configuration. Can't seem to find one to fit the B box flange. Also, would it over stress the gearbox bearings. Sure would like to hear from anyone out there that has tried this
  2. MACOWA

    Flutter

    Those of us that have been on HBA for a while realize that we have some pretty sharp knives in our drawer. any Thoughts on preventing flutter in the lower speed ranges that we generally fly in ?
  3. MACOWA

    First things first ?

    I have noticed that over the years many fine aircraft have been delayed in development while in search of an appropriate power plant to suit the design air frame. I don't know whether it's a result of being an inveterate hot rodder or just being contrary, but I am now adapting the closest...
  4. MACOWA

    3004 aluminum .

    Just downloaded the data sheet. Possibly could be a lower cost material for aviation use. Thoughts ?
  5. MACOWA

    Drone Question

    Is a drone legally an aircraft ? I have seen many on the net claim that they are and further, demand that they be treated as such.
  6. MACOWA

    Parts Wanted TB-2

    Wanted. manual controls & canopy to fit Bayraktar TB-2 aircraft.
  7. MACOWA

    Parts Wanted 1/2 VW

    1/2 VW parts. Heads & or rotating assembly parts from incomplete project, or ?
  8. MACOWA

    Smith-DSA-"miniplane"

    An old friend of mine needed a new motor for his DSA and found a zero hours example. as apart of an unfinished project. The only hitch was that he had to remove the whole situation or no deal. I got the rest. Still have the wings. Truly an excellent set of hardware especially the Freise control...
  9. MACOWA

    Half in a row ?

    Just some speculative engineering I guess, but has anyone considered building a 1/2 VW with two left (or right) cylinders ? Using a common head, as designed might eliminate the hassle of individual heads. & add stiffness to the complete unit plus eliminating a lot of pipes. Crank balance could...
  10. MACOWA

    REPACK

    I own an older model Sidewinder BRS. (big aluminum can carried internally). It's been in need of a repack for some time. I've been looking for some one willing to do this without much luck. Perhaps others face a similar dilemma with the older ones. Does anyone know of a place to get this done ?
  11. MACOWA

    Hummel Ultra cruiser

    Just mailed a check to Hummel for my Fuselage and canopy kit Lori said that it will ship within a week. Where the hell did I put all those Cleco's
  12. MACOWA

    Parts For Sale O'Keefe landing gear

    Aluminum leaf for Sonerai 1 fits many others, untouched blank $400.
  13. MACOWA

    #550 Zenair floats

    I am awaiting delivery of my Hummel ultracriuser fuselage kit. I live on a small sheltered cove on Puget sound. The #550 Zenair floats would be ideal. I just got off the phone with Zenith they have not been produced for 15 year and plans are unavailable. any help with finding plans or the...
  14. MACOWA

    503 powered Ultra cruiser ?

    My 0 hrs, Rotax,prop, wheels,brakes,spring gear and instruments need a new home. I've been considering a number of designs for some time. I bought a plan set from Hummel yesterday. Ideas? Info? advice? Thanks guys.
  15. MACOWA

    Prerotator

    Has anyone ever used a small chainsaw motor as a prerotator ? Light, powerful, small when stripped down, and comes with an appropriate clutch. When mounted to the mast top it could be fairly compact.
  16. MACOWA

    Gyrobee

    need an appropriate rotor head & blades
  17. MACOWA

    Has anyone built a Gyrobee lately?

    It's windy where I live, a part 103 machine would be great, I have a zero hours 503. It spins a 5 bladepowerfin adjustable prop I have a set of Black max wheels & brakes and would like to use a pair of Sky wheels blades. all of these are heavy things. perhaps this could be mitigated by the use...
  18. MACOWA

    scratch build

    Hello. Its good to be back. I have not been on the site since 2014. My last two projects turned out well, but as many of us know life happens. I now find myself with the time and resources to begin another build. Perhaps the simplest aircraft possible. probably under under the 254 limit. An...
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