EE Canberra and Martin B-57

[Captain Canada]

A little bit like my Indian Air Force Canberra perhaps?

Man....that is beautiful ! Love the pointy nose. Kinda looks like a 104.

 

[Brian da Basher]

That pointy-nosed Indian Canberra is gorgeous, Spinners! You've given it a very nice look and the paintob is superb!

Brian da Basher

[lancer]

Beautiful looking Canberra Spinners

[Martin H]

I did not see anything in the Airfix announcement about the 1/48th scale Canberra and B-57 kits other than the UK versions and the B-57B model.  I was really hoping that Airfix would step up and provide us with a B-57G "Tropic Moon" bird as an alternative to that incredibly expensive Collectaire kit.

im betting that Airfix will leave that to the aftermarket sector. Airfix provide a base kit, the after market boys can then go to town on it.

[AeroplaneDriver]

I just picked up an Italeri B-57B today and I'm thinking of the possibilities.  I love the USAF all-black scheme with red markings, so I may do a real-world build, but if I whif it I'm thinking of a long-range interceptor version with a load of AAMs in the bay and on the wings.  

[kitnut617]

I'm liking the idea of a turboprop Canberra.  My thinking is of a Carrier based multi-role aircraft used in the ASW/ASuW/Recon/Land Attack role.  I'd probably go with contra-rotating props.  Any ideas on a suitable turbo-prop engine?  Would a turbo-prop development of a RR Avon be possible?

Regards,

Greg

Tynes maybe?

[elmayerle]

I'm liking the idea of a turboprop Canberra.  My thinking is of a Carrier based multi-role aircraft used in the ASW/ASuW/Recon/Land Attack role.  I'd probably go with contra-rotating props.  Any ideas on a suitable turbo-prop engine?  Would a turbo-prop development of a RR Avon be possible?

Tynes maybe?

From the standpoint of what would likely fit the nacelles, I think Darts would be the better choice over Tynes as, as far as I can tell dimensionally, Tynes would require larger nacelles.

HTH,
Evan

[GTX]

Or as I said a Turboprop Avon derivative maybe?  No dimensional problems, though it would be a powerful sucker!

Regards,

Greg

[elmayerle]

Or as I said a Turboprop Avon derivative maybe?  No dimensional problems, though it would be a powerful sucker!

Hmm, let me do a bit of BOTE (Back Of The Envelope) analysis, here.  For comparison purposes, the T57 turboprop derivative of the J57 developed a maximum of 15,000 shp while in dry for, the basic J57 devloped 11,000 lb. thrust.  The dry Avons (or Sapphires/J65s in the B-57) have a rating of 7500 lb. thrust.  Using the same ratio (rough, I know), that gives you a roughly 10,000 shp engine.  Given the direct conversion, the necessary direct drive nature of the turboprop (as opposed to the free turbine gearbox drive of engines like the PT6), and that most of the Avon would be reused (as opposed to the more highly developed Avon power units with a two-stage free turbine), this value seems reasonable.

Methinks that's a touch of overkill, but I can see its uses.

I'd think that the inlet, gearbox, and props from a Tyne would be a good place to start for modelling a Canberra with this engine.

[jcf]

Howabout Proteus II or Eland?

Jon

[GTX]

Me thinks if you stick props onto a Canberra you will have to do something about the undercarriage height.

Yes, but if you go contra-prop with short blades it should be alright without changing them.

I had thought of that and was going with the contraprop idea already.  I was also going to measure up one of the Canberras at work to get exact dimensions.

Regards,

Greg

[kitnut617]

I was also going to measure up one of the Canberras at work to get exact dimensions.
Regards,

Greg

Neat! could you let me know what size of prop we could get away with please.

[GTX]

Checked today - the Canberra at work is a little over 2m from ground to centre of the intake centrebody.  Therefore propos of a radius of between 1.5m and 1.8m should be fine.

Regards,

Greg

[kitnut617]

Spitfire size props then! hmm! possibilities.  Thanks for the measurment GTX

Robert

[kitnut617]

I'm thinking contra-rotating and around 5 blades each.

Regards,

Greg

Absolutely       what type if intake, Dart/Tyne style or above/below style