A question

[Ivan]

If built could you run a rotary engine in buckets at all if you worked it out to be the equivilent of 100cc?

[nudemetalz]

be bloody small cylinders.....

[Skunk]

Wankel....

[pete376403]

would be a tiny rotary if the formula comparing rotary / reciprotating still applies - eg a 13B (1.3 litre) Mazda was considered to be equivalent to a 3 litre or thereabouts piston engine . Lots here http://www.drivingsports.com/site/20...e-equivalency/

[Pumba]

The rotary wankle engine is just a four stroke engine in a different configuration (someone correct me if I am wrong here)

Therefore as long as it fit into the class rules with its capacity calculated as per the following MNZ rule:

Rule 10-15-2
Rotary combustion (Wankel Patent): Capacity of one working chamber in cubic centimetres, multiplied by number of rotors, multiplied by two.

Couldnt see any issues

[koba]

I have thought one of these would be interesting, but you couldn't use it for buckets because its a competition engine that is too big.

Does the 250 count under the new proposed 125GP rules though...?
The dyno graph looks very favorable but the gearing situation could prove interesting.

[avgas]

hmmm it used to be 1300cc rotary vs 3L+ 4 strokes
so that would make it what 50cc rotary? Yes it could be done, yes you would have to replace the engine each race.
Nothing against rotaries - truth be told if you made a massive one it would be super reliable.

[koba]

The rotary wankle engine is just a four stroke engine in a different configuration (someone correct me if I am wrong here)

Therefore as long as it fit into the class rules with its capacity calculated as per the following MNZ rule:



Couldnt see any issues

Ahh, true that would screw the 250 in 125GP then.
Shame, It only weighs 15 kg too...

[speights_bud]

If built could you run a rotary engine in buckets at all if you worked it out to be the equivilent of 100cc?

i remember reading in an older version of the MNZ rules that it was ok so long as the CC rating complied

[CookMySock]

I have thought one of these would be interesting, but you couldn't use it for buckets because its a competition engine that is too big.

Theres a sachs wankel lawn mower engine that is emphatically not a competition engine.

http://www.trademe.co.nz/Browse/Sear...g=sachs+rotary

I have seen one of these peripheral ported.

Steve

[koba]

Theres a sachs wankel lawn mower engine that is emphatically not a competition engine.

http://www.trademe.co.nz/Browse/Sear...g=sachs+rotary

I have seen one of these peripheral ported.

Steve

Interesting!

Jeeze thats some crazy $!

[F5 Dave]

[sigh] from the rules; "Engines must be derived from non-competition motorcycles. . ."

ok Ivan, what non-competition motorcycle uses a rotisserie engine?

I think that precludes lawnmowers,
even if it is stretching the word 'rotary'.

[CookMySock]

I think that precludes lawnmowers,
even if it is stretching the word 'rotary'.

Yup. Fear my ohlins-equipped briggs and stratton bucket, with its' industrial vee-belt drive. I'll even bring the rotary-tiller attachment to help get your winter garden in good shape.

Will an 8hp motor spook the farmyard too much? If not, why not allow the sachs just for amusement sake? It will be a feat of engineering just getting a gearbox attached to it, and then comes the mods to get 13,000rpm out of it. Much fun to be had there. If it gets outlawed later on coz its too fast, then it will go down in history as such, much like the skylines did in V8 motor racing - now legends, along with the people who built them.

Steve

[nudemetalz]

mmmm,.....rotary racer....
Just listen to how quickly it revs,....I see that 8hp Sachs engine with potential.....

[youtube]http://www.youtube.com/watch?v=VDngDlIuyIE[/youtube]

[Ivan]

[sigh] from the rules; "Engines must be derived from non-competition motorcycles. . ."

ok Ivan, what non-competition motorcycle uses a rotisserie engine?

I think that precludes lawnmowers,
even if it is stretching the word 'rotary'.

It was a thought I was thinking of cause my mates got a 13b and I was looking at it and thought hmm if you made your own would it be aloud in buckets.