Aircraft grade aluminium?

[Wolfgang]

Hi everybody

 

I am wondering if the fuselage is made from aircraft aluminium? All the fuselage pictures doesn't show any labels which identifies the tubes as aircraft aluminium.

 

Does anybody know the proper alloy which is used on the aircraft?

 

Regards,

 

Wolfgang

 

 

[JG3]

The traditional 'aircraft aluminium' is 2024. It's stronger for it's weight, but very prone to corrosion, fatigue, and bend cracking. Most of the recreational aircraft these days use structural aluminium 6061, which is very corrosion resistant, and less prone to fatigue and bend cracking. It's an excellent material.

 

JG

 

 

[Wolfgang]

Sure. That is known. But even the 6061 label would be found on the aluminium. And it is not. So what does the Sierra or Cheetah use?

 

 

[Garry Morgan]

Most of the metal is 6061 some tubes are 6030, the fusalarge with out the outside skin is 3.5 times stronger other aircraft with a 6G ulimate load as our cheetah is ,and the sierra 100 way above that again. you wont break it

 

 

[Guest davehw]

Hi Wolfgang,

 

I am currently building a Morgan Aero Works Sierra 100. The 25mm x 25mm square tubes supplied are definately commercial aluminium. The only 'aircraft grade' aluminium in kits is the 6061T6 sheets supplied. There are some commercial heavier sheet sections supplied in kit also, for rudder lower hinge plate, aileron & flap horns etc. My suggestion is to replace these smaller and important items with 2024T3 aircraft sheet sections of similar or slightly thicker sheet. Gary Morgan should be able to tell you exactly what material/sections he is providing.

 

regards,

 

Dave Henty-Wilson raa amateur & factory built inspector. LAME groups 1 5 6 10 etc.

 

 

[Garry Morgan]

materials

 

never listen to any one other than the manfaucture. do not use 2024 alloy in our aircraft. the spars are 6061 t6 with a release report of the material. also never change the material or conponets of any kit with out the manfaucture knowing, it is to easy to get caught out. the fuslarge is 3.5 x the 6 G required for the british standard, this a lot higher than the europan standard, the wing was tested to 8.5G

 

Also most of the imported aircraft dont use approved materials or bolts, do not comply to our standard ( brithish sec S) are so lightly built 12 months in a flying school and they are worn out. our australian aircraft are some of the very best out there because we build to a proper standard, we use steel fire walls as most of inports are alloy.

 

The sierra is now under going certificating in australia and will be one of the strongest and best you will find.