Radial Engine Summer Project

[bryan1]

G'day Guys,
After reading a thread on the FL forum about using the wind for compressed air I decided to go and do some research on engines from the past which would suit the task. In that thread a guy in the US has made a SS 4 cylinder 2x2 side by side compressor which is one beauty of a compressor. Anyway in my research I found the old radial engine would fit the bill nicely and to date I've never seen one made for a wind based air compressor.

This image is shown on the wiki site

As one can see with a few mod's to the head arrangement this style of engine would be a smooth runner. I had a steel billet at work rusting away that measured 177.8 diameter and when faced 110mm long. Today being xmas day and with the sun shining I spend about 6 hours on the mill roughing down the crankcase. With the material being EN35A it is pretty tough on tools and only small cuts could taken. Anyway got a 5 sides roughed down and in the morning I'll put up a facing tool and do the final cuts ensuring all 5 sides are within 0.001". for the barrels I do have a few old engine crane rams which will be purfect for the barrels. I'll bore a seat on each face and put a O-ring groove on the seat and use 4 off M10 tie rods to clamp the head and barrel for a air tight seal. For the pistons I'll make my own and use some chrome leather soaked with silicon grease for the piston rings.

Cheers Bryan
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[bryan1]

Stripped one of engine crane rams today and they are no go for barrels as I didn't realise the outer case wasn't the ram bore. So looks like i'm stalled until I get back to work and grab some 75mm ID hydraulic honed bore pipe off a mate. With the crankcase size I can get away with a 100mm stroke and with using a 75mm bore that will work out to 1.178 litres. Not a bad size I reckon and I now doing some research on making this a 2 stroke diesel that will run on a diesel/vege oil/sump oil mix.

Cheers Bryan

 

[WestOzXJR]

.... with a 100mm stroke and with using a 75mm bore that will work out to 1.178 litres. Not a bad size I reckon and I now doing some research on making this a 2 stroke diesel that will run on a diesel/vege oil/sump oil mix.

Are you sure about the maths on that? It's not the answer I get when I ran those numbers....

Post up the formula you used to make those calcs...

 

[bryan1]

Whoops silly me went 0.75 x pi x .1 x 5 instead of 0.075 x pi x .1 x5 which works out to 0.1178

 

[WestOzXJR]

That formula you're using is: D x TT x L = volume

(where TT = pi but I couldn't find the right symbol)

The correct actual formula is: R² x TT x L = volume

So you need to divide the diameter by 2 then square it.

Therefore the actual swept volume per cylinder in cubic centimeters = (7.5/2)² x 3.14 x 10 = 441.6 cc

 

[tcmtech]

Neat machining project! So is it going to be an air compressor or an engine?

And yes the correct formula for cylinder volume is (3.1415 R² * hight) so that gives a 100 mm stroke by 75 mm bore 5 cylinder engine a swept volume of (100 * 3.1415 * 37.5²) * 5 = 2208932 mm³ or roughly 2.2 liters.

 

[mekanizmalar]

Is your radial compressor completed?

Hi Bryan,
I am administrator of The Flap Turbine is a novel type of vertical axis turbine and I am planning to build a turbine which will generate compressed air as you described. I am planning to build a radial compressor as shown in my web page Radial Engine. and as you described here. My question is, have you completed your compressor? Have you connected it to a wind turbine?

 

[mekanizmalar]

Hi Bryan, I am administrator of The Flap Turbine is a novel type of vertical axis turbine and I am planning to build a turbine which will generate compressed air as you described. I am planning to build a radial compressor as shown in my web page Radial Engine. and as you described in here. My question is, have you completed your compressor? Have you connected it to a wind turbine?

 

[mekanizmalar]

Hi Bryan,
I am administrator of The Flap Turbine is a novel type of vertical axis turbine and I am planning to build a turbine which will generate compressed air as you described. I am planning to build a radial compressor as shown in my web page Radial Engine. and as you described here. My question is, have you completed your compressor? Have you connected it to a wind turbine?