Propeller to jet engine

[PMN1]

According to Bill Gunston, 'Roy Chadwick wanted to put four Nenes in a Lancaster which would have been almost immune to intercption or flak'.

Anyone seen the expected performance for this?

Any other WW2 bombers suggested for conversion to jet power?

[Ricky]

I thought this sounded familiar...

http://www.tgplanes.com/Public/snitz/topic.asp?TOPIC_ID=994&SearchTerms=lancaster,jet

still, we got kinda sidetracked in there, didn't we...;)

[PMN1]

quote:Originally posted by Ricky

I thought this sounded familiar...

http://www.tgplanes.com/Public/snitz/topic.asp?TOPIC_ID=994&SearchTerms=lancaster,jet

still, we got kinda sidetracked in there, didn't we...;)


Ahh, I thought so, it seems very specific terms are needed for searches, I search on Nenes and not Nene's

Anyway, were there any engines that might have been suitable for the B29....

What would Whittle's LR1 have done for Lancaster etc performance - 6,000lb thrust IIRC from Bill Gunston and turbofan efficiency...

[Red Admiral]

I've just been reading one of Gunston's books about jet engines. He tells the story of the DC-3 used to test the new RR Dart turboprop rapidly overtaking a B-29 at 33000ft :)

LR.1 had about 5500-6000lb thrust and sfc around 0.50lb/lbf-hr (maybe) which would have been a reasonable engine for use on Lincolns or B-29s in the underslung pods.

Quick calcs for a Nene Lancaster (4x1460hp Merlin XX * 0.80 prop efficiency = 4670lbf for 287mph) ( 4 x 4500lbf Nene = 18000lbf = 450mph which is probably around Mcrit for the Lanc)

[Groggy]

quote:Originally posted by Red Admiral

I've just been reading one of Gunston's books about jet engines. He tells the story of the DC-3 used to test the new RR Dart turboprop rapidly overtaking a B-29 at 33000ft :)

LR.1 had about 5500-6000lb thrust and sfc around 0.50lb/lbf-hr (maybe) which would have been a reasonable engine for use on Lincolns or B-29s in the underslung pods.

Quick calcs for a Nene Lancaster (4x1460hp Merlin XX * 0.80 prop efficiency = 4670lbf for 287mph) ( 4 x 4500lbf Nene = 18000lbf = 450mph which is probably around Mcrit for the Lanc)




Hi Red Admiral,

The turbofan was I think 80%+ complete when they stopped work or Whittle left?

[PMN1]

quote:Originally posted by Groggy


Hi Red Admiral,

The turbofan was I think 80%+ complete when they stopped work or Whittle left?



The Man from the Ministry told him to along with work on a potentially successful turboprop.