On Harvards, what is welded inuse and overhaul?
Sat Mar 28, 2009 1:34 am
As I am into welding and I like ww2 aircraft esp Harvards, I would like to know what is welded on these, Might be a silly question but if I don't ask I'll never know. 
Cheers
Fw190
Cheers
Fw190
Sat Mar 28, 2009 1:58 am
.
The entire forward fuselage section from firewall to end of the rear canopy consists of a welded steel tube frame of 4130 round steel tube formed into a box section of 4 longerons and cross bracing, and rollover truss. This same construction was used in Harvard derivitive as well as the Australian Wirraway and Boomerang, and seperately the BT-13 and many other designs.
The Wirraway, Boomerang and early North American NA-16's /SNJ-1/BC-1 all had a steel tube rear fuselage frame whereas the T-6/SNJ/Harvard models had a stressed skin monocoque rear fuselage but retained the same steel tube construction for the forward fuselage.
regards
Mark Pilkington
The entire forward fuselage section from firewall to end of the rear canopy consists of a welded steel tube frame of 4130 round steel tube formed into a box section of 4 longerons and cross bracing, and rollover truss. This same construction was used in Harvard derivitive as well as the Australian Wirraway and Boomerang, and seperately the BT-13 and many other designs.
The Wirraway, Boomerang and early North American NA-16's /SNJ-1/BC-1 all had a steel tube rear fuselage frame whereas the T-6/SNJ/Harvard models had a stressed skin monocoque rear fuselage but retained the same steel tube construction for the forward fuselage.
regards
Mark Pilkington
Sat Mar 28, 2009 7:48 am
you forgot the engine mount,
Sat Mar 28, 2009 7:56 am
Matt Gunsch wrote:you forgot the engine mount,
smiles, that I did, and that most engine mounts are welded steel tube in anycase, not just the T6/Harvard.
regards
Mark Pilkington
Sat Mar 28, 2009 10:36 am
Some of the fairings are welded together, and a lot of the eletrical
(boxes are welded together. Additionally you have the oil tank upper
support mount, the oil tank itself, the fuel tanks, the oil cooler upper
support brace, and countless small brackets that "hold stuff" that
are welded assemblies.
Bela P. Havasreti
(boxes are welded together. Additionally you have the oil tank upper
support mount, the oil tank itself, the fuel tanks, the oil cooler upper
support brace, and countless small brackets that "hold stuff" that
are welded assemblies.
Bela P. Havasreti
Sat Mar 28, 2009 5:04 pm
Some of our Harvards came with the wooden rear fuselage(done in case of a shortage of Aluminium I believe). I think the RNZAF Historic Flight's Harvard NZ1015 was one of them, of course they replaced the wooden fuse later on!
Sun Mar 29, 2009 12:06 pm
The US Type Certificate Data Sheet clearly prohibits the usage of the wooden tailcone. You have to go experimental I guess if you wanted to fly with one of those.avenger2504 wrote:Some of our Harvards came with the wooden rear fuselage(done in case of a shortage of Aluminium I believe). I think the RNZAF Historic Flight's Harvard NZ1015 was one of them, of course they replaced the wooden fuse later on!
Sun Mar 29, 2009 4:41 pm
bdk wrote:The US Type Certificate Data Sheet clearly prohibits the usage of the wooden tailcone. You have to go experimental I guess if you wanted to fly with one of those.avenger2504 wrote:Some of our Harvards came with the wooden rear fuselage(done in case of a shortage of Aluminium I believe). I think the RNZAF Historic Flight's Harvard NZ1015 was one of them, of course they replaced the wooden fuse later on!
I understood that the wooden tailcone was replaced in service, and that only one aircraft survives world wide with a wooden tailcone, and that aircraft was supposedly in the collection of the South African Air Force Museum?
regards
Mark Pilkington