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  1. Bob Kelly

    Tell me why this won't work !

    HAHAH well there ya go ! that says it all ! .... that sure is a bunch quieter than a pressure jet powered heli LOL .... thanks for the info ! ... Bob....
  2. Bob Kelly

    Tell me why this won't work !

    How can we tell you it Won't work...when it obviously DOES ? the hard part about hydrogen peroxide tip rockets is the "Rocket Grade fuel" its expensive and hard to find. the next hardest part is the swivel needed at the rotor ...although it can be purchased, so I'm told, I don't know where that...
  3. Bob Kelly

    New rotorcraft concepts

    Actually I was thinking of the 32cc to 45cc gas powered leaf blowers... not the electric ones... whats the point if ya have to run an extenion cord to it <GRIN> I have ran a few of the Bigger leaf blowers in my time working for building maintenance at diferent places.. some of them put out a...
  4. Bob Kelly

    New rotorcraft concepts

    The Nitrous Oxide Rocket tips work very good for a BPH... a few guys have tried them, no reverse torque to have to counter and in general they work very good, the only problem is obtaining the fuel as "Rocket Grade" Nitrous Oxide is hard to get and very expensive when you can get it... so that...
  5. Bob Kelly

    New rotorcraft concepts

    Hay Gilbert ! are you in your sailboat ? if so Where ? Gary said you were headed to the Carabien or somethin' LOL ... if so don't you know there are easier ways to Torture yourself than be confined in a box for weeks at a time ? ... Good to hear from ya buddy ! Bob.....
  6. Bob Kelly

    Proposed Homemade Rotor Blade

    Exactly davh12 ! I wound up making laminated SOLID rotors with a 1/8"x2"x10' steel spar under the leading edge curve to balance the blades cord wise. .... I made the rotor blades from hardwood sub flooring that has NO VOIDS in it, glued the strips together with Weldwood Resin glue and sanded...
  7. Bob Kelly

    Tell me why this won't work !

    tell you why it won't work ? I can't because it works very well ! they arn't the only one that has done that. I saw a 4 place gyro that was vertical takeoff or "Jump take off" as they called it that was for sale comercially.... its price was unreal as most aircraft are but still the concept...
  8. Bob Kelly

    New rotorcraft concepts

    Ohhh Kool thank you very much ! ... Bob...
  9. Bob Kelly

    New rotorcraft concepts

    I just spent 2 hrs trying to sign up again on that Frigging YAHOO! and it still won't let me in...says taint no such person! ...LOL ! Howdy Gilbert ! I ain't hurd from Sonny in about 8 months now! hope he's ok ! I'll try again on the forum.... no silly program is going to get the best of me ...
  10. Bob Kelly

    New rotorcraft concepts

    Pie-row: the Wankel would be the best choice... but you have to have over $5,000 to purchase even a smaller one, I don't know what the 50hp version costs though, probably $8,000 or more. but YES it will take that kind of power to weight ratio to get a backpack heli off the ground....O planned...
  11. Bob Kelly

    New rotorcraft concepts

    Herr Shoffmans Back pack helicopter is indeed a Wonder and a marvelous piece of engineering... its Very expensive engine,along with its Made to order counter rotating props do indeed get him aloft.... but just barely! he went to a 2000ASL field and could not get out of ground effect... where at...
  12. Bob Kelly

    Homemade rotor

    Tyc... the only back filling I did on the screw holes was reson from the fiberglass covering... .... I did consider testing the blades to distruction but then I'ed have to make more blades....! so I didn't consider it very long! I will mount the blades on the rotor hub bar with no pitch and spin...
  13. Bob Kelly

    Homemade rotor

    Your So Right Don... there is a bunch more to it than I mentioned....that should go without saying, but I guess its best to be SURE eh ? hehehehe cord wize balance on my rotor blades is acomplished by the 1/8"x2"x 10ft long metal strip added to the inderside of the leading edge... screwed in...
  14. Bob Kelly

    Homemade rotor

    Last I hurd Sonny was doing fine... Kind'a down because of the work siduation... you Know Sonny he be a work-aholic ! gott'a be doing something!...but I havn't hurd from him in a good month... and I've been too busy to Hurrass him ! ... I seriously doubt I will get to fly the gyro this year...
  15. Bob Kelly

    Homemade rotor

    I did Ron , but I can't remember what it was...and I'ed be just guessing if I said... their heavier than the old ones butnot by that much... guessing at 15 to 20lbs each blade... ...the blades are 8" wide 10ft long Asemetrical profile ...meaning the bottom side is flat. ... ... Bob......
  16. Bob Kelly

    Homemade rotor

    I MADE a set of rotor blades last summer out of plywood UNDERLAYMENT...2MM thickness I believe it was ( just shy of 3/16" thick) the reason I used this meterial is because it is completely VOID-LESS... just like Marine plywood but at less than 1/4 the cost. I used 5 strips to make up the...
  17. Bob Kelly

    Mountian Flying

    welp... I posted that question 4 years ago... so if anyone was going to help they would have by now....so don't wait for your fellow pilots to help... their way too busy polishing their airplane for that ! <hehehehehe> ... Bob......
  18. Bob Kelly

    Setting up a gyro for rough feilds.

    Howdy Birdy ! I'ed like to try some of those garden tractor tires that are about 8" wide and about 16" tall... run them with about 4 P.S.I. and it should give a nice soft ride as well as no digging in in sand... thr tires I have on my gyro now seam to dig in in gravel fairly bad... and that...
  19. Bob Kelly

    Setting up a gyro for rough feilds.

    Oh ok ... OOPS sorry ! seams I posted and it dissipeared... but I probly just poked the wrong button... no biggy anyway ! <GRIN> ..... ..... ANYWAY... back to the subject at Hand... setting up a gyro or any aircraft for that matter for use on rough feilds. ... seams to me that Most Gyros can...
  20. Bob Kelly

    Setting up a gyro for rough feilds.

    I agree Dana... completely ! <grin> ... I have found with my Gyro that the 13" tires and wheels on it simply leave allot to be desired... they ride rather hard and in loose ground dig in and act like a break is applied on that side ...a very BAD thing on a gyro that is Tippy anyway... I think...
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