Search Results - Practical Machinist - Largest Manufacturing Technology Forum on the Web
Close
Login to Your Account

Search:

Type: Posts; User: saucerdesigner

Page 1 of 2 1 2

Search: Search took 0.00 seconds.

  1. In my haste to try out GearBakery, I accepted the...

    In my haste to try out GearBakery, I accepted the defaults of 0.050 for clearance and backlash. In response to your question, I plugged .005 into the respective fields to take a look visually and it...
  2. As it should be. Mouth full of crow here. I...

    As it should be. Mouth full of crow here. I apologize for the severe case of thick skull.
    The 12"+ dia. bevel gear supported at the periphery idea is in the trash where it belongs.
    Ever since I had...
  3. The right angle drive is history for all the...

    The right angle drive is history for all the reasons pointed out earlier by others.
    Yes, in the project's infancy I had considered timing belts and pulleys from Stock Drive Products but at these...
  4. It wasn't his fault. Incredibly reckless of me,...

    It wasn't his fault. Incredibly reckless of me, truth be told.
    At the outset he pointed out the 1/2 x 1/2 x 4 inch piece of angle iron at my feet to put on the rack uphill from me to stop the next...
  5. Yessir, this challenge has pulled me through the...

    Yessir, this challenge has pulled me through the devastation of loosing a 25+ year career as a professional pilot and flight instructor.
    In 1995 I had my chest crushed between two 40' joints of...
  6. Agreed. I also agree with DD on consulting a...

    Agreed.
    I also agree with DD on consulting a gear expert. If anyone could recommend one I'll gladly give them a shout.
    Again, the main gear OD has to stay at 12"+. I don't know how to put it any...
  7. Thank you for the explanation. So if I...

    Thank you for the explanation. So if I understand, since the main gear has to stay at 12"+, after the 2.5-1 reduction the mating pinion will be 6"+.
    Very much appreciated. Sorry to be such a pain....
  8. If my math is correct the load on the main gear...

    If my math is correct the load on the main gear at design point is estimated at:
    hp:1.7
    torque [lb force-ft]:1.5
    power absorbed [Watt]:1282.4
  9. Agreed. I'll seek out a gear expert before...

    Agreed. I'll seek out a gear expert before requesting a quote again. Suggestions on a gear expert are welcome.
    The main gear has to turn at 6K RPM (at full throttle). There is no option for further...
  10. I'll check out PEEK polymers. I was thinking of...

    I'll check out PEEK polymers. I was thinking of making the main bevel gear out of glass-filled nylon, but don't know if/how it could be machined.

    The most popular propellers for alcohol/castor oil...
  11. I'm not an engineer either and very inexperienced...

    I'm not an engineer either and very inexperienced at machining, obviously, and not sure I understand how a reduction gearbox would help in my case. The main gear diameter and RPM cannot be changed as...
  12. A couple of questions: 1. If you had to...

    A couple of questions:

    1. If you had to choose, what material would you use?
    2. What do you think about using 7075-T6 Al for both the pinion and main bevel gear?

    Thanks
    SD
  13. I have corrected the main bevel gear screw-up and...

    I have corrected the main bevel gear screw-up and now the inside diameter is as it should be. The old files have been removed.
    I really appreciate the comments, especially regarding concerns about...
  14. Thank you Peter. I'll try to keep things...

    Thank you Peter. I'll try to keep things stateside for now.
    SD
  15. Folks please don't waste any more time on this. I...

    Folks please don't waste any more time on this. I have discovered lots of errors in the Main Gear file and it looks like I'll have to generate it again from scratch. I apologize for the...
  16. Thank you. The pinion will be turning at 30,000...

    Thank you. The pinion will be turning at 30,000 RPM at full-throttle to produce 6000 RPM for the main gear (design point). I just got off the phone with an old friend who is the semi-retired CEO of...
  17. Thank you. I requested a quote from Rush Gear out...

    Thank you. I requested a quote from Rush Gear out of PA and I'm still recovering from the shock of it. I'll search for True Gear and Premier.

    Thanks again,
    SD
  18. Thank you. This is a proof-of-concept prototype...

    Thank you. This is a proof-of-concept prototype and will be operated primarily to demonstrate that the device continues to climb out of ground effect. I'll bet other changes will need to be made if...
  19. A candidate has raised an issue regarding the...

    A candidate has raised an issue regarding the inside diameter of 3640_3.20_Main_Gear. The inside diameter should have been 11.900". All my attempts at correcting it have failed in the rush to avoid...
  20. Thanks for the reply. Much appreciated.

    Thanks for the reply. Much appreciated.
  21. It's a straight bevel gear. The main bevel gear...

    It's a straight bevel gear. The main bevel gear is to be made of Delrin 150, per ASTM D792 or equivalent. The pinion bevel gear is to be made of 6061-T6 aluminum. Thanks
    SD
  22. Nope, not an airplane. I said VTOL aircraft. The...

    Nope, not an airplane. I said VTOL aircraft. The V stands for Vertical. Airplane land is a category and class of aircraft which require a takeoff and landing ground roll to attain safe airspeed for...
  23. Thanks. All of the specifications including...

    Thanks. All of the specifications including material are in "Bevel Gear README.txt" which can be found in the folder titled "Main Bevel Gear" here:...
  24. Thanks for the suggestion. All of the...

    Thanks for the suggestion. All of the specifications including material are in "Bevel Gear README.txt" which can be found in the folder titled "Main Bevel Gear"...
  25. No, neither a catalog part nor a modified one...

    No, neither a catalog part nor a modified one will suffice.
    Thanks.
Results 1 to 25 of 26
Page 1 of 2 1 2