Engine technology free-for-all

[J.A.W.]

This may afford a bit more insight into the various country's and engines tradeoffs and oversights;

http://books.google.com/books?id=lo9TAA ... ve&f=false

Yes - that venerable tome is a real classic, albeit perhaps best seen today with due awareness of
the limitations of the then available information, & also by the technical values (bias) of its authors..

Perhaps old man Honda was over-sold on their views of the merits accruing to air-cooling?

[J.A.W.]

From the same decade (70+ years ago) is this engineering appraisal..

http://www.flightglobal.com/pdfarchive/ ... 01590.html

.. of the inherent advantages of DI/SI 2-stroke recip' mills, for aero engines..

But - their application potential in aviation was, of course cut short by the advent of gas turbines..

..yet the power-density formula still stacks up for shaft-power uses..

[J.A.W.]

The Napier Deltic CI 2-stroke phasing/timing explained.. http://www.pigeonsnest.co.uk/stuff/deltic/chapter4.pdf

Perhaps Manolis could do a triple rotor flyer - using some of these design principles?

[countersteer]

70 cc's ... 5 hp ...



http://www.enginelabs.com/news/liquidpi ... ry-engine/

[J.A.W.]

70 cc's ... 5 hp ...

http://www.speednik.com/files/2014/11/l ... 40x426.jpg

http://www.enginelabs.com/news/liquidpi ... ry-engine/

Compact for sure, C, but not much power.. ..a current showroom kid's 85cc 2-stroke MX bike is good for well over 20hp..

[Ciro Pabón]

Well, if it´s for compactness, the word is Cox.

I was 11 years old when I disassembled one and I fell in love with it.

80 watts at 22600 rpm, that's 0.1 Horsepower in 0.049 cubic inches (0.82 cubic centimeters)

This is what legends are made of


This engine is indestructible. Bought in 1979, already used, it can survive any crash while running at 22000 rpm. Forged, not casted. Beautiful. For grandsons, best gift


William Selzer, designer extraordinaire, maker of diminutive immortal engines, craftman

[J.A.W.]

Hell yeah C-B,
- & who doesn't love the smell of bean oil & nitro/methanol in the mornin'...

[Ciro Pabón]

Sure, J.A.W., there is no meth like nitrometh.

[Brian Coat]

Free for all ...

Hydrazine: Makes nitro seem like Evian.

[J.A.W.]

Here is a paper showing how Nazi rocket scientists rated their fuels..
.. such as hydrazine, but as we know, even diesel fuel rates as rather violently energetic..

http://www.cdvandt.org/Wunderwaffen-file-11110.pdf

[Brian Coat]

Thanks for the info, J.A.W.

This (allegedly) shows what happens if you mix it with nitromethane and put it in a 1960 V8 ... !

http://www.competitionplus.com/2004_10_ ... azine.html

[J.A.W.]

Well, - the term 'blown' surely applies to that bisected Hemi, B-C..

..( & just to be a stickler -its a `50s, 1st gen unit).

[riff_raff]

Here is a paper showing how Nazi rocket scientists rated their fuels..
.. such as hydrazine, but as we know, even diesel fuel rates as rather violently energetic..

The hypergolic propellant mixture you noted MMH/N2O4 (monomethyl hydrazine and nitrogen tetroxide) is still commonly used for attitude control thrusters on many space vehicles. The result of MMH fuel coming into contact with N2O4 oxidizer is an extremely energetic chemical reaction. When the small RCS thrusters on a spacecraft using these propellants are cycled, it produces a very loud "bang".

The downside is that MMH is extremely toxic.

[Brian Coat]

Re: "...( & just to be a stickler -its a `50s, 1st gen unit)."

The alleged 204 mph run was in 1960, is all I meant. Apologies if this was misleading.

As you correctly point out, the unit obviously had to be a first gen hemi because (1) it says so in the article ('392') and (2) the 2nd generation 'Elephant Motor' was not yet introduced.

[J.A.W.]

Yeah B.C., those 1st gen Mopar Hemi mills were a well engineered unit,
& it would take some force to split that block in twain - as shown..

AFAIR, the hi-po Hemi was the 1st Detroit mass-production V8 to boast 1hp-per-cubic inch displacement,
- but it was dropped from production in the late `50s in - favour of the lighter, cheaper to make 'Wedge'..