Zoomzoooie
Well-Known Member
Hi, I'm new here.
I have been working on designing a cub style ultralight under the Canadian ultralight regulations, something like the N-3 Pup, only more suited to bush flying.
I have a few questions about tubing sizes for one and 2 seat welded tube ultralight and kit aircraft.
First is 5/8" dia x .049 4130 used most often? The reason I ask is because I was once told that I should use 3/4" x .035 4130 because it makes a stronger and lighter airframe. I need to keep the airframe as light, strong and affordable as possible to allow for a four stroke engine with more power (80-100hp) for better performance and reliability. A single seat basic UL in Canada can have a launch weight up to 364lbs and 430lbs for a two seater, this includes fuel.
Second, what is your opinion and facts about using 3/4" x .035 4130 tubing instead of 5/8"?
I have been working on designing a cub style ultralight under the Canadian ultralight regulations, something like the N-3 Pup, only more suited to bush flying.
I have a few questions about tubing sizes for one and 2 seat welded tube ultralight and kit aircraft.
First is 5/8" dia x .049 4130 used most often? The reason I ask is because I was once told that I should use 3/4" x .035 4130 because it makes a stronger and lighter airframe. I need to keep the airframe as light, strong and affordable as possible to allow for a four stroke engine with more power (80-100hp) for better performance and reliability. A single seat basic UL in Canada can have a launch weight up to 364lbs and 430lbs for a two seater, this includes fuel.
Second, what is your opinion and facts about using 3/4" x .035 4130 tubing instead of 5/8"?