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  1. D

    What's up with these webless ribs?

    Hi,I have seen a number of ultralights with wings whose ribs don't have webs e.g this Affordaplane: I once learnt that the webs in wing ribs help to transfer shear forces as well as wing loads on the wing skin to the spars,so my question is how will these "shear forces" be transfered from the...
  2. T

    Has anyone built their own personal flying machine?

    Hi there, I work for a television production company and I am currently doing some research into the exciting world of aviation. I am trying find stories of people who have built their own incredible and unusual flying machines and aircraft (or are still building), and was wondering whether...
    • TVresearch
    • Thread
    • balloon designing aircraft drone experimental gyro homebuild new aircraft idea paramotor soaring ultralight
    • Replies: 23
    • Forum: Hangar Flying - Off Topic
  3. D

    Removing "useless" struts between the fore and aft wing spar of a goat4 ultralight.

    Hi people of HBA,my question is will there be any consequence if I remove the strut (A and B )between the wing spars of my goat4 ultralight?...as seen in this image below...
  4. D

    FILLING THE SPACE BETWEEN WING SPAR AND IN SLEEVE.

    HI there, the space between the wing spar and an insleeve is about 0.5cm.Hence,there is a visible separation between the wing spar and sleeve,so I decided to put pvc pipe inbetween the wing spar and its sleeves to fill the space between the spar and sleeve. My question is,is this really a wise...
  5. D

    Position of dragwires in wing bays

    Hello there����,pls take a good look at the small dots on the bays of this two-spar wing .my question is, is the drag and anti drag wire as seen in bay 1 supposed to connect to the root of the compression tube or to the intersection between the wing spars and compression tube as seen in bay 2...
  6. D

    Position of dragwires in wing bays

    Hello there����,pls take a good look at the small dots on the bays of this two-spar wing...
  7. D

    Is the wing attach fitting ever loaded with shear force?

    Do wing attach fittings of semi-cantilevered plane(eg a wire braced ultralight) ever get subjected to shear force?(for example during roll,does the centrifugal force of the wings load the wing attach fittings with shear?).
  8. D

    In sleeve:yes.....outsleeve???

    In sleeve tubes help to reinforce high stress areas in wing spars,my question is,is there anything like outsleeve tube? Isn't it better to just put a sleeve tube on the outside of the spar rather than cutting the spar then inserting the insleeeve tube?
  9. D

    Why do "ladder" wings have no compression strut towards their wing tip?

    https://scontent.flos2-1.fna.fbcdn.net/v/t1.0-9/fr/cp0/e15/q65/47010854_744236279285251_7750259899992375296_n.jpg?_nc_cat=104&efg=eyJpIjoidCJ9&_nc_eui2=AeGgDEMLKl1cgXWa68LDMFswYXRxZkiXDdeZ7BVTYxsMS_QHApCX6Gi56m3ijNgwyypHCYHCZlYexY73ndLqB3ISz6ho6elw-uDawl-EcIcOsEFNzfNxL9PfiGR3jhEB2pI&_nc_ht=sconte...
  10. D

    The use of the spanwise foam boards between the ribs of an Affordaplane ultralight.

    What is the use of the span wise foam boards between the ribs of Affordaplane wings?, are they there to help prevent rib movement\chaffing when the wing gets covered .Here is a picture of what am talking about https://i.stack.imgur.com/h9k0Y.jpg Here's a video...
  11. D

    What is the function of leading edge strip?

    https://i.stack.imgur.com/mciE7.jpg .....Hi,I understand the fuctions of every part of a fabric wing but not its leading edge strip,so what is its function?and can I remove the leading edge strip without hurting the wing performance?
  12. D

    How do I load test a wing?

    My airplane(plus pilot and fuel) weigh about 155kg,how do I calculate the total amount of load to test the wings with?
  13. D

    How do I load test a wing?

    Hello,am David and am attempting to build an ultralight airplane.
  14. b7gwap

    Swift discussion

    Folks: I’ve spent the last 6 months at my school doing a senior engineering project that has ended up being a tailless pusher UAV small enough to be man-packable and capable of delivering a NATO 40 mm grenade round against enemy personnel. I have read up a lot about nurflügel aerodynamics...
    • b7gwap
    • Thread
    • aeriane swept swift tailless ultralight
    • Replies: 14
    • Forum: Soaring
  15. F

    McCULLOCH 4318A ENGINES

    I have 2 engines. I am asking $750 each. I have another post with props that can be bundled with the engines. The engines are in good condition but I have not run them.
  16. S

    2 Seater Chinook Plus 2

    2-SEATER CHINOOK PLUS 2 • $3,000 Chinook Plus 2 (Birdman 2S converted). I bought her 7 mo ago and have only had the Rotax 503 dual carb air-cooled, electric start engine completely rebuilt at Aircore Aviation in Arlington, WA. It has not been broken in yet since rebuilt in July 2017. Includes a...
  17. K

    Tempest ultralight sailplane Moyes

    I sell my Moyes Tempest ultralight sailplane The airplane includes a pneumatic parachute and had previously installed a Snap100 engine, which is also included in this sale. I sell it as is, this means it has a bent left wing spar and some tear in the cloth because while it was stored a heavy...
  18. L

    What would be a reasonable CLmax estimate for the USA35A thick, high-lift airfoil?

    Hi, I'm trying to choose airfoils and establish wing dimensions (and high lift devices if needed) for my design. I have a low stall speed requirement (Vs0 = 42km/h [with flaps]), so I'm looking into high-lift airfoils with good stall and thick enough for a light spar. I'm trying to balance CLmax...
  19. L

    Looking for someone experienced to help me with my first "simple" airplane design

    Hi, I'm a high-school student just doing my finals next month. For a long time, I wanted to design and build airplanes, but had insufficient funds, time and workshop space. I did not waste my time though. Over the past year, I've been building model aircraft and studying aerodynamics. I've read...
  20. L

    Greetings from an aspiring designer!

    Hello everyone! :) I have scored thousands of hours in WWII aviation combat games over a past few years and I got hooked forever... Since then I've been learning, building and flying model airplanes (crashed a lot of them) and now comes the moment of truth: can I build a real airplane? I'm on...
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