Flat air cooled 12 for the 914?, Wonder if this will fit.... Options

[My 914]

Displacement?
Dimensions?

https://en.wikipedia.org/wiki/Franklin_O-805

According to the link, the engine displaces 805 cu inches. That's 13.2 liters. Its a monster! I wonder what it weighs?

[rgalla9146]

The magnetos will be on either side of the shifter.
You'll rest your elbow on one of the four Weber 40s
No flywheel necessary.

[rgalla9146]

Displacement?
Dimensions?

https://en.wikipedia.org/wiki/Franklin_O-805

According to the link, the engine displaces 805 cu inches. That's 13.2 liters. Its a monster! I wonder what it weighs?

Excuse me sir
That would be 13.41 liters !

[veekry9]

An example of a flat -12,somewhere between the extremes.
Bruce Crower in America built a turbo flat eight in 1976,methanol fueled,for USAC(Indy).
Lind in Sweden has built a type-4 8,The Brazilians Marco and Arlindo have done it to a type-1.
Looking at the pix of the engines,it is clear that twelves can also be done with similar methods.
Some custom parts have to be designed and made to fit,ie,the cases,crank,cams,heads.
Using the 94mm(3.7") cylinders of the 2L T-4,and a 66mm(2.6") stroke crank,a displacement of 350in^3,is achieved.
Using the bore spacing to T-4 dims,the crank has fewer mains and a shorter length.
Pushrod heads,6 X T-4 heads,welded and silver-soldered together,a huge engine.
A lot of work,and requiring the moderate lengthening of the wheelbase,~200mm.
(IMG:style_emoticons/default/smile.gif)
Build your own engine,just like Ettore Bugatti,and the Wright brothers,35 years before.
To some of you,it's a far-fetched dream,while others are working on such fairy dust,made of metal.
Climbing mountains makes people 'feel something',making metal feels something too.
(IMG:style_emoticons/default/biggrin.gif)


(IMG:style_emoticons/default/happy11.gif)
/
Note the case stiffening plates Lind has installed to carry the cylinder bases on the Eight.
I believe he has plug welded the original stud holes,then,welded the plates for a secure re-machining for the studs.
A taller deck height,solving case spigot discrepancies,and the thin-wall die-castings.A perfect solution.
He has also welded up the plug holes,then re-machined for smaller,angled plugs.
(IMG:style_emoticons/default/evilgrin.gif)
/

[mskala]

You won't need a transmission; single speed like sprint cars.

Just mount it at an angle going into the passenger seat and run a short prop
shaft to the ring gear of diff. (IMG:style_emoticons/default/biggrin.gif)

[veekry9]

A better cooling,more difficult way is the repetition of the front cylinder.
Promoting a more evenly cooled mass,the air passages distributed regularly.
Increasing the depth of the cooling fins is a good idea too.
(IMG:style_emoticons/default/biggrin.gif)

[Brian Mifsud]

Here's the appropriate gearbox.....

[My 914]

Displacement?
Dimensions?

https://en.wikipedia.org/wiki/Franklin_O-805

According to the link, the engine displaces 805 cu inches. That's 13.2 liters. Its a monster! I wonder what it weighs?

Excuse me sir
That would be 13.41 liters !

according to professor google who performed the calculation, 805 cu inches comes out to 13.191 liters which I rounded off to 13.2