• 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. N

    CAR-251: The Cheap Air Racer Discussion thread.

    Hello Nerobro Thank you for starting this thread and for doing the design process so publicly. This is going to be a fantastic resource - I wished something like this was already on HBA. Freshies (noobs) like me spend hours and hours trawling HBA patching pieces of posts together to try and...
  2. N

    Aluminium Sandwich Panel Fuse

    Hi again BBerson Thank you for your reply. As it obviously shows I don't have much access to seeing aircraft construction. I heard there is a CX5 being built in my city so I guess I need to try get a look at that. Sorry to keep posting noob type questions - I try to search for answers and look...
  3. N

    Aluminium Sandwich Panel Fuse

    Hi BBerson I guess I must have misunderstood. You said that ".020" or .025" is common and requires fewer stringers." and that "I would say 38 pounds (or 15kg) for a SD-1 fuselage is in the ballpark. (skin only)" I took the last comment to mean that the skin or covering would weigh about 15kg...
  4. N

    Aluminium Sandwich Panel Fuse

    I also wanted to post a comparison of ply vs 6061 skins. I have made 4 test laminates - 0.025" 6061-T6 aluminium on a 1" and a 50mm core (Core is H35 Divinycell) and 3.5mm marine ply (They don't have aircraft ply in the software) on a 1" and a 50mm core (Core is H35 Divinycell) The 6061-T6 with...
  5. N

    Aluminium Sandwich Panel Fuse

    Hi again I had an excellent reply about the tensile strength reducing as the core increases from the folk at Vectorply - so I thought I'd share it. "Most cores typically have a very low tensile strength. Tensile strength is measured by how much load can be pulled before a specimen breaks...
  6. N

    Aluminium Sandwich Panel Fuse

    Hello all I have been playing with some software called Vectorlam (Vectorply Composite Fabrics, Laminate Composites, Reinforcement Fabrics) It allows you to create and calculate the strength of laminate panels. I decided to see the strength difference between a 25mm foam core sandwich vs a...
  7. N

    Free 3D modelling software to design a microlight, what is the best?

    Hi All I'm an industrial designer so I spend a large (too large!) portion of my day on CAD. I have worked with Inventor, Solidworks and Rhino. I have worked almost exclusively with Rhino for the last 8 years as it fits with the type of work I do. However I have been trying out another program...
  8. N

    Aluminium Sandwich Panel Fuse

    Hi BBerson Thank you for your reply - I appreciate your patience! I re-ran the numbers with 0.025" sheet. The solid version comes down to 46.9kg The sandwich version comes down to 37kg (Plus at least one bulk head will be 38.46kg) That is a reasonable difference now. I still wonder how much...
  9. N

    Aluminium Sandwich Panel Fuse

    Hi all Thank you for the replies. I thought I'd do the math just to prove to myself that this is a no-go. .....Either my math is bad or the solid fuse is ok! Would you mind checking my method: (Sorry about the metric units!) I drew up a fuse like the picture in my last post. Its a small one...
  10. N

    Aluminium Sandwich Panel Fuse

    Hi all again I keep reading, then day dreaming, then thinking I have a better way to build! I've tried to search for the answer to this on HBA but not had much luck. What about solid foam in the fuse? Still boxy to allow sheet covering but not requiring two sheets (internal and external) per...
  11. N

    Anybody in the Wellington NZ area?

    Hey Dana I'm in Wellington - but I'm afraid I don't have a plane or even a pile of material to show yet! The home building scene here seems to be quite small. I have spoken with a CX4 builder in Wellington and I know the local SAANZ chapter has some home builts. (At least a Flitzer but it may...
  12. N

    Aircraft Design Books

    Hi DaveD Thank you for that - it's hard to know what to read - Hiscocks book sounds like what I want. I want an overview of the process with enough meat to bite into but not so deep that I never finish it! I found this link - Peter Hiscocks Dept. Electrical Engineering Wonder if that email...
  13. N

    Aircraft Design Books

    Hi All I thought it would be worth asking here before I buy new. Does anyone have either of these that they would like to sell? Design of Light Aircraft. Richard Hiscocks Simplified Aircraft Design for Homebuilders. Dan Raymer I live in New Zealand so I am not sure if shipping is a cost...
  14. N

    Aluminium Sandwich Panel Fuse

    Hi all Thanks again for the replies! GESchwarz - thank you for the clarification. At the moment my inner and outer skins are isolated from each other. I have read that inner and outer sandwich skins should be attached. Why? This would be fairly easy to do at the cockpit where the panels...
  15. N

    5083 vs 6061

    Sorry for all the posting guys - but it makes sense to post findings in case this topic comes up again. Just did a quick scan through MIL-HDBK-5J and came across this: "Alloys 5083, 5086, and 5456 should not be used under high constant applied stress for continuous service at temperatures...
  16. N

    5083 vs 6061

    Thanks Matt G I'm downloading now. Sorry to keep flogging it but came across this as I waited for download. Aluminium grades ? - Zenith Aircraft Builders and Flyers Someone asking the same question - he was advised to stick to the specified grade but interesting that the airframe repairers...
  17. N

    Aluminium Sandwich Panel Fuse

    Here is a cut-away of the basic construction idea. (It will be boxy but that's a tradeoff for construction speed - at least that's the general idea!) There would be a closed box section fuse (except at the cockpit) with bulkheads to act as the shear members. Skinned inside and out. Fibreglass...
  18. N

    5083 vs 6061

    Hi Matt G Thank you for pointing that out - is there a reliable source for specs to do a proper comparison? I haven't specified a temper as I am trying to determine if any temper of this alloy is suitable. However it has been pointed out that 5083 might not be easy to find in the guages...
  19. N

    5083 vs 6061

    Hi Rotax618 Bother! Just had a quick search and am not finding anything below 3mm either. We use it quite a bit for work but I've never spec'd it below 3mm. I'll have to ask the suppliers on Monday but this might be a dead end after all. Cheers David
  20. N

    5083 vs 6061

    Thanks Dcarr Wow the fatigue and fracture toughness are well above 6061! Hmmm...
Back
Top