• Welcome aboard HomebuiltAirplanes.com, your destination for connecting with a thriving community of more than 10,000 active members, all passionate about home-built aviation. Dive into our comprehensive repository of knowledge, exchange technical insights, arrange get-togethers, and trade aircrafts/parts with like-minded enthusiasts. Unearth a wide-ranging collection of general and kit plane aviation subjects, enriched with engaging imagery, in-depth technical manuals, and rare archives.

    For a nominal fee of $99.99/year or $12.99/month, you can immerse yourself in this dynamic community and unparalleled treasure-trove of aviation knowledge.

    Embark on your journey now!

    Click Here to Become a Premium Member and Experience Homebuilt Airplanes to the Fullest!

Search results

Find deals on amazon
Advertise with us
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
  1. P

    Fold wings to 100in or drop and fold to 92in?

    I'm still drawing my ultralight with folding wings, How important is it really to stay under 8ft wide? If I drop the wings and then fold the max width is the horizontal tail. If I simply swing the wings it is chord plus stuff to about 102in. Swing wing is fairly simple . Drop and swing...
  2. P

    Double swivel hinge?

    I'm getting close to getting back to my UL with folding wings. I need to tip the wing up and then swing them. My best hinge at this point is a rod end into a fork . The fork is threaded and mounts into a hole with a loose nut fixing it . This allows the wing to move the way that I require...
  3. P

    GSC props ?

    They seem like the go to medium price prop. Pros vs cons? Thanks ,MM I will need a ground adjustable prop for my craft. I will use the Hirth 30 HP as a base line and change to a Big Twin, using the same redrive . This will require another couple of in pitch vs the 2 stroke at 5500 RPM vs...
  4. P

    Whats the best aircraft design software?

    What are you using? Does it give airfoil changes with flaps.spoilers etc? Thanks.MM I n particular , i would like to run an airfoil with spoilerons. And watch the change in airflow . My napkin simulator shows a little increase in lift at low deflection. Counter to desire. Clark Y with...
  5. P

    Airfoil 450 gross, 100 sq ft. , 14%, USA35B, Clark, or Rag Wing?

    Drawing out my foil now. Has anyone used the Rag wing foil? It's kinda fat vs the 14% 35B foil. Is there much real world difference? Thanks,MM
  6. P

    What is a common 4130 Sheet thickness for wing tabs?

    I ran out of street sign stock. I want to order some 4130 sheet for my inner wing mounts. Both on the fuse and wing root. The plane gross is 475# . I will use 4 triangle shapes per fix point. two on the wing ,two on the fuse per joint. What is the common gauge? Thanks.MM
  7. P

    lift strut tube size with weld in nuts source.

    Drawing up the struts for my 500# gross ultralight. I see that Kitfox uses 3/4 x.035 tube. I would like a 3/8 bolt into the end of the strut to facilitate the wing swing and pivot. What is the common source for the strut ends? 7/8 tube x 065 is pretty heavy but the ID is .745 and I can get...
  8. P

    Is it common to solder the nutsert into the tube?

    I hate slop and like the nutserts. Has anyone soldered or brazed the nutserts into their AC?
  9. P

    Fuel hopper tank?

    Is everyone using a small hopper tank for wing mounted main tanks? I hate getting air in the line. Thanks .MM
  10. P

    Basic Modern Ultralight, BMU

    I have started drawing my Modernized Demoiselle. BMU.. For today's market with airports and hangers getting out of hand cost wise, It has to have folding wings and fit inside of an 8.5 ft wide trailer. So that is the first design parameter. Folding wings that nest on the rudder. A tow...
  11. P

    Pitch vs angle

    Anyone have a quick chart for using angle to match my pitch? 56x28 prop. What should the angle be at 75%? Thanks, MM
  12. P

    Spoilerons ?

    I did the search . Has anyone used up only spoilerons for the only roll control? Maybe added to some dihedral? Also... I want to mount mine at 25% , front spar firm. I cant see why it wont work. Ugly maybe but should work fine IMHO. I want this plane to be light enough for 22 HP and adding...
  13. P

    Weld or Braze?

    The race cars that I worked on are all brazed, very little or no welding. I welded my last 4130 fuse together. But wonder if I can braze some of the diagonals for the rear of the Demoiselle fuse . I plan on gas welding the majors .
  14. P

    Need 2 stroke mufflers and pipes .

    Cuyuna 430 and Hirth 383 , 2 cycle , 2 stroke mufflers needed. What do ya have? I can fabricate most small Rotax style to fit. Thanks,MM
  15. P

    tractor Prop for Rotax 6 bolt pattern. about 54x27 ish

    Wood preferred . I think that it needs to be LH.maybe ??
  16. P

    Best source for pipes and mufflers?

    I have 2 cute little engines without exhaust. Hirth 383cc needs a pipe or muffer. Same for Cuyuna 430. Whats the best source,? Thanks,MM
  17. P

    Does X foil address the details yet?

    CL modifiers like Gurney Flap, Vortex generators, Tip plates, wing sweep .? I looked at it and have passed so far for lack of these inputs. Thanks for any input . MM
  18. P

    Bending 5/8 ,035,4130?

    I bent some 1.5 4130 with issues. Has anyone bent the 5/8 in with sucess? Thanks.MM Is this the correct forum?
  19. P

    UL spars?? Tube or plank?

    I need 18ft spars. 3in Alluminum looks to be the standard. Has anyone used 1x1 alluminum as caps over foam? This would alloy me to make full depth spars and easy hard points.
  20. P

    Glues for foam to alloy tube?

    Is there a better glue than Gorrilla glue for foam? To the spar and for covering?
Back
Top