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Author Topic: Utterly fantastic aero engines  (Read 1030 times)

Offline MiloMorai

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Utterly fantastic aero engines
« on: February 11, 2005, 07:45:20 AM »
Rolls-Royce Eagle 22
- by Barry Hares
 
The main details of the full-size engine are as follows:
Type of engine: Geared, pressure liquid cooled, flat H, sleeve valve engine with two-speed, two-stage liquid cooled supercharger, driving contra-rotating propellers through reduction gearing.
Bore 5.4”
Stroke 5.125”
Swept volume 2,816 cu in (46 litres)
Compression ratio 6.5:1
Supercharger ratios 3.0:1 & 3.67:1
Reduction gear ratio 0.298:1
Maximum power 3,200 HP at 18 psi boost
Carburetor indirect fuel injection

For a 1/5th-size engine, this gave a total capacity of 22.53 cu in (370 cc).


A larger pic is at the website.


"Inside a 1/5th Scale Rolls-Royce Merlin XX, Completed in the Early 1980s. Took him 6000+ hours of work




Take the time and look at the craftmanship,

http://www.enginehistory.org/merlin_xx.htm

The short jpg of the Merlin running is a must view.
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Offline mars01

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« Reply #1 on: February 11, 2005, 09:58:50 AM »
That is a beautiful work of art.

Great write up of what happend in 1 second in the merlin too.


Very cool.  Thanks Milo.
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Offline Bodhi

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« Reply #2 on: February 11, 2005, 10:10:38 AM »
WOW  :eek:

Amazing work.
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Offline Charge

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« Reply #3 on: February 11, 2005, 12:39:29 PM »
Great looking piece of craftsmanship!

BTW

"flat H, sleeve valve engine"

The model engine is a V with normal valves. Napier Sabre was an H and had sleeve valves.

-C+
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Offline MiloMorai

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« Reply #4 on: February 11, 2005, 04:47:47 PM »
charge, look at the pics here, http://www.enginehistory.org/eagle_22.htm

The RR Eagle was also a sleeve valve H-24.


The site is a wealth of info, such as this 1940 Japanese 24 cylinder X engine, YE3.

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Offline Charge

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« Reply #5 on: February 11, 2005, 08:57:43 PM »
Eh, sry Milo I didn' notice that. I stand corrected.

That picture of assembled cylinder bank of an H engine looks great! Good details of an exotic valve/cylinder combination.

:)


-C+
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Offline Angus

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« Reply #6 on: February 13, 2005, 05:33:40 AM »
Duhhh, it's RR.
Why hasn't anybody posted a pic of the DB  :D :D
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Offline Charge

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« Reply #7 on: February 13, 2005, 07:28:35 AM »
Nobody makes those small DBs?

Or what do you think Angus?

-C+
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Offline Angus

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« Reply #8 on: February 13, 2005, 10:15:18 AM »
I think, why not :D
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It was very interesting to carry out the flight trials at Rechlin with the Spitfire and the Hurricane. Both types are very simple to fly compared to our aircraft, and childishly easy to take-off and land. (Werner Mölders)

Offline Charge

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« Reply #9 on: February 14, 2005, 05:23:03 AM »
Maybe because it is a matter of perfection? Resemblance is not good enough, it has to be exactly like the original?

Some ideas why there is no DB: The DB was a solid block engine ie. The cylinder pipes and the cylinder block was not removable from the crankcase. Thus it is harder to manufacture with CNC machinery as the whole block should be cast, and then machined.

The supercharger was not mechanical as in RR but hydraulic and that could be problematic to manufacture. (It could be made mechanical of course...)

The RR-type is still quite common engine and thus its structure is well known and documented whereas the DB is hard to find, at least in dismantled condition, for inspection.

Does anybody have any dismantled pictures of a DB? It would be interesting to see how it was different to RR.

Cheers,

-C+
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"When you wish upon a falling star, your dreams can come true. Unless it's really a giant meteor hurtling to the earth which will destroy all life. Then you're pretty much screwed no matter what you wish for. Unless of course, it's death by meteorite."

Offline MiloMorai

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« Reply #10 on: February 14, 2005, 06:00:02 AM »
A BMW 801 should be possible though.

Charge you can get engine drawings (iso) from here, http://aviationshoppe.com/catalog/default.php?cPath=21

DB601
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Offline Angus

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« Reply #11 on: February 14, 2005, 05:54:21 PM »
Re-manufacturing a DB, staying with the princip should not be that hard in 2005?

Or was it more quirky than you'd think?
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It was very interesting to carry out the flight trials at Rechlin with the Spitfire and the Hurricane. Both types are very simple to fly compared to our aircraft, and childishly easy to take-off and land. (Werner Mölders)

Offline Charge

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« Reply #12 on: February 14, 2005, 07:01:31 PM »
"Or was it more quirky than you'd think?"

You care to explain Angus, I really can't stay with you on this one..?

Quirky?

-C+
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Offline GRUNHERZ

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« Reply #13 on: February 14, 2005, 08:53:09 PM »
Quote
Originally posted by Angus
Re-manufacturing a DB, staying with the princip should not be that hard in 2005?

Or was it more quirky than you'd think?


Rolls Royce told the Bf109G2 "Black 6" restoration team to not break the original DB605 crankshaft because they could not make a replacement...

:)
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Offline MiloMorai

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« Reply #14 on: February 14, 2005, 09:14:46 PM »
Oops

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