ESE's works engine tuner

[husaberg]

......... whats the answer if the aim is to air cool the base of the cylinder and the transfers and any extra air cooling of the crankcase and its oil is just collateral damage.

Pack it with paraffin
https://ntrs.nasa.gov/search.jsp?R=20150003481
http://www.andores.com/sale-9516724-...ge-system.html
http://www.autospeed.com/cms/article...ooler&A=110772

Specifically, its typical characteristics are:

Melting point: 52 degrees C
Specific heat: 3.27 kJ per kg per degree C
Specific heat of fusion: 210 kJ/kg
So to increase the temp of 1kg of the wax from 47 to 52 degrees takes 16.35kJ, but to push it past 52 degrees takes nearly 13 times as much energy. (Or, to risk causing confusion, you could dissipate in it a power of 14kW for 15 seconds to melt 1kg.)

Paraffin wax is non-toxic, doesn't explode (although it will catch fire if you expose it to a naked flame) and is easily handled. Special waxes designed specifically for this change-of-state heat storage purpose are also available with melting points in 10-degree C increments from 50 degrees to 100 degrees C, however their availability is obviously less than simple candle wax.

[TZ350]

That was part of my air cooled RGV project. I abandoned it when I was handed the gift of 110cc max oversize for H2O 2T's.......

[husaberg]

That was part of my air cooled RGV project. I abandoned it when I was handed the gift of 110cc max oversize for H2O 2T's.......

Sometimes clever people make their own luck.
That said cooling that gear box oil would be pretty easy and cheap old trans cooler or oil cooler off XR400 are neat or even pitbike.

https://newmanz.co.nz/shop/index.php...2l567mce443pq5
some of the car ones are WC now

https://www.aliexpress.com/item/Tran...826806175.html

Hondas too.
https://www.aliexpress.com/item/Heat...d-636aa08949b6
this one appears to go straight to the trans look at the other pics open at back?
looking at theses you could run dual water circuits easy colder water for cases and cylinder ex port hotter for head.

[TZ350]

.
The oil coolers are very interesting. As I am running a dry sump I have a gear box oil pump so it should be pretty easy to add an oil cooler. A water one would be great as the radiator runs about 40 deg C.

[pete376403]

.
The oil coolers are very interesting. As I am running a dry sump I have a gear box oil pump so it should be pretty easy to add an oil cooler. A water one would be great as the radiator runs about 40 deg C.

Some Mazdas (no idea sorry) had a little radiator to cool the power steering fluid. I've read of one being used in a water cooled CPU computer rig

[koenich]

Some Mazdas (no idea sorry) had a little radiator to cool the power steering fluid. I've read of one being used in a water cooled CPU computer rig

nearly all cars with an automatic double clutch transmission have a gearbox oil cooler. the issue I see is once the oil temps drops the viscosity will increase and therefore the losses, so you might ne to readjust for the cooler temperatures.

[yatasaki]

If your drawing is somewhat to scale. I would have a piston-window fed single c port.

It's schematic. In reality, with single dykes ring piston there is 2mm space between top of the inlet and ring.

[husaberg]

Some Mazdas (no idea sorry) had a little radiator to cool the power steering fluid. I've read of one being used in a water cooled CPU computer rig

Mazda 6


or these

[pete376403]

nearly all cars with an automatic double clutch transmission have a gearbox oil cooler. the issue I see is once the oil temps drops the viscosity will increase and therefore the losses, so you might ne to readjust for the cooler temperatures.

Yes,but this as a small rad, maybe 100 x 100mm, small enough to mount on a bike without over cooling

[Vannik]

.
The oil coolers are very interesting. As I am running a dry sump I have a gear box oil pump so it should be pretty easy to add an oil cooler. A water one would be great as the radiator runs about 40 deg C.

If I remember correctly, Martin Wimmer on his TZ250N, back in '85 ran a transmission oilcooler in an effort to cool the crankcases. I think it was done by Helmut Fath.

[Muhr]

https://www.thinkauto.com/acatalog/O...cooler_18.html

[husaberg]

if i remember correctly, martin wimmer on his tz250n, back in '85 ran a transmission oilcooler in an effort to cool the crankcases. I think it was done by helmut fath.

fairing nose?


Although this is 83


if they kept using it..........

[andreas]

It's schematic. In reality, with single dykes ring piston there is 2mm space between top of the inlet and ring.

Yes, that wont work.

[andreas]

Pack it with paraffin
https://ntrs.nasa.gov/search.jsp?R=20150003481
http://www.andores.com/sale-9516724-...ge-system.html
http://www.autospeed.com/cms/article...ooler&A=110772

TZ could you reverse the cylinder?

[Norman]

How hot can the transmission oil typically be in a two stroke high performance engine?