
by Martin R » Sat Dec 06, 2008 7:58 pm
by Petter » Sat Dec 06, 2008 10:57 pm
by Firebird1900 » Sun Dec 07, 2008 1:40 am
by JonathanL » Sun Dec 07, 2008 9:13 am
Firebird1900 wrote:Yes there are people looking at compressed air as an energy source for cars and prototypes have been built. Problem is storing enough of it to get decent range, and the pressures are high which means thick tanks which means weight.
by Martin R » Sun Dec 07, 2008 10:38 am
by funnycar » Sun Dec 07, 2008 1:10 pm
by Petter » Sun Dec 07, 2008 6:11 pm
by Julian_S » Sun Dec 07, 2008 6:17 pm
funnycar wrote:
The trouble with SiAlON, it can only machined with Diamond tools !!
by Julian_S » Sun Dec 07, 2008 6:19 pm
JonathanL wrote:[
There are toy aircraft you can buy which have litte piston engines which run on compressed air.
by Julian_S » Sun Dec 07, 2008 8:41 pm
by Firebird1900 » Sun Dec 07, 2008 9:55 pm
by JonathanL » Mon Dec 08, 2008 10:48 am
Julian_S wrote:JonathanL wrote:[
There are toy aircraft you can buy which have litte piston engines which run on compressed air.
Toy = Model?
From my yufff I remember them running on CO2, not compressed air - but I'm a bit rusty nowadays...
Julian.
by Julian_S » Mon Dec 08, 2008 3:13 pm
JonathanL wrote:Julian_S wrote:JonathanL wrote:[
There are toy aircraft you can buy which have litte piston engines which run on compressed air.
Toy = Model?
From my yufff I remember them running on CO2, not compressed air - but I'm a bit rusty nowadays...
Julian.
They're called Air Hogs. Think I got my nephew one once. Stopped making them recently, I think.
http://cgi.ebay.com/Spinmaster-Air-Hogs ... 7C294%3A50
Apparently, it's not a new idea;
http://blog.modernmechanix.com/2007/11/ ... essed-air/
by Julian_S » Mon Dec 08, 2008 8:05 pm
Firebird1900 wrote:verey very approximate .........
If you are storing air at 300 bar (which is pushing it!) then a cubic metre (1000 litres) of stored air will give you 300,000 litres at atmospheric
so if you have a one litre engine ............ and u assume u use it all ........ and it all ends up at atmospheric ............ and its a two stroke engine .......... thats 300,000 revolutions (in practice u would get a lot less than this because the cyliners would be above atmospheric at end of stroke and you would need some residual pressure in the tanks)
for simplicity say you do 3,000 rpm thats 100 minutes of driving.
ball park guesstimate suggests that its not impossible but it is beyond what is possible today to get a sensible range with a sensible pressure / volume.
alternatively u could work it out from stored energy but someone else can have a go at that
by Martin R » Tue Dec 09, 2008 12:55 pm