My class 5 Yorker design mast is built from scaffold tube for the lower section and T6 tubes for the top sections
Common design used here in New Zealand and originated in England Reliable design but not light

I was given the frame from a decommissioned hang glider.

I was looking a the leading edge tube, which has a fibreglass tip. How doe this tube work as a mast? It seems to have very thin wall, but I do not know the alloy or temper.

Cheers

Hi Clem.

Nothing stamped on it.

I am amidst a shed clean up, so I will dig it out for a measure and photo. There are quite a few section sizes, Also an aerofoil profile I am desperate to do something with.

I have to say I have been neglecting the Mini for quite some time but moving the bits and pieces around has inspired me to finish some builds and get back into it, I have found 4 frames in various stages of completion, (one of them painted!)

Starting a new build with the ali is something I have wanted to do, but I'll need to make some space and finish some stuff first!

Last trip in Ruff-Azz busted the sail, and the trip before bent the steering arm!


Also we use 6061 ali quite a lot at work, (My personal favourite ali alloy!). From memory getting anything more than T6 was a massive problem. Even specifying T6 we were often informed that they will "try" but the best they, (Ali extrusion suppliers) would guarantee was T5.

Cheers,
Glenn

I found a great source for 6061-t8 aluminum in telescoping sizes for anyone here in the states. Great prices and FREE SHIPPING cant beat that. the only draw back was they only have as long as 6 foot lenghts.www.dxengineering.com/search/department/rigid-tubing/part-type/aluminum-tubing/product-line/dx-engineering-aluminum-tubing?autoview=SKU&N=department%3arigid-tubing%2bpart-type%3aaluminum-tubing&sortby=Default&sortorder=Ascending