Snecma M53 high quality cutaway drawing

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M

msxyz

Senior Airman
348
374
Jul 17, 2012
Taken from a 1985 sales brochure. I've never seen such a good cutaway around so I thought I would share. The booklet is a dozen of page long but gives very little info aside from the usual bragging you'd expect from a sale brochure. I don't know how many of them were sold outside of Dassault.

The M53 is unique because it's a single spool bypass turbojet, meaning that the front LP compressor is moved by the same shaft as the HP compressor. I don't think there are other single spool bypass turbojets that reached production stage, but feel free to prove me wrong...

 
nuuumannn said:
Very reliable engine, from what little I've read.
Click to expand...
It's a very simple and effective design. One shaft and only two main bearings (plus a smaller one at front for the overhung fan). Eight stages. It can't get any simpler with that.
 
msxyz said:
It's a very simple and effective design. One shaft and only two main bearings (plus a smaller one at front for the overhung fan). Eight stages. It can't get any simpler with that.
Click to expand...
It does have its drawbacks, but the engine being modular and being resistant to disturbed flow shows that the decision to do it in the face of the disadvantages was smart. The F100 when it first came out needed kid gloves.
 
nuuumannn said:
It does have its drawbacks, but the engine being modular and being resistant to disturbed flow shows that the decision to do it in the face of the disadvantages was smart. The F100 when it first came out needed kid gloves.
Click to expand...
A lot of effort and simulations must have gone into the design of the shape of the compressor wheels. Early jets used many more stages for lower compression rates and they were very prone to compressor stalls (sometimes all it took for a flame out was the pilot farting in the wrong direction! ). I'd love to take a look at a maintenance manual to see the engine innards in detail, but I've yet to see one popping up on ebay.
 
Thanks for the information. Unfortunately the first link sends me to an advertising page, as if the domain is no longer maintained. I know a little bit of Russian so I can usually navigate in Russian language sites quite well. There is little material about French engines available. Also for some earlier engines of historical importance (i.e. the Atar 101) is pretty hard to find service manuals, handbooks, etc...
 
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