Newbie with a question

[Liftoff]

That's a buffer ram, spent some time toying with that idea, and whilst I agree with you it that you avoid all valvetry and flow problems, to design and machine that ram into a size which will fit inside a featherweight will be difficult. For a heavyweight it would probably be a good option but it's been mentioned that the velocity of the piston will be so high that there is a high possibility of blowing the cylinder top cap off...and that sort of put me off.
But I like the concept.

[maddox10]

I made one of those rams, feather size.

After a few dry fires the endcap was getting new and interesting shapes. But non that inspired confidence in the survivability of the setup in RW.

Also, the weight was higher for the same amount of power as the classic Cuttlet setup.

[Will]

The latent heat of vaporisation of CO2 is 574kJ/kg the energy density of a typical LiPo is about 500kJ/kg - so not much to call it.
Unfortunately you need a container for the CO2, which for the relatively small amounts involved drives the density right down.

Not impossible - but probably not an advantage.

Si

I was thinking more along the lines of maximum power output, electric motors tend to be pretty poor for mass vs peak power. it would be relatively simple to spin something up using a jet of co2 onto an fan/turbine.

Hi Will,

I am in Rochdale and currently building myself so it would be good to put heads together, especially if you need help.

Sounds good 😀
As I said I've got a lot of other things still to finish off before i start in earnest but I'm happy to help out if I'm free.

[Jakebowman420]

Hi guys really sorry to bother you with this! I'm a new member as well and it wont let me post a new thread? My account has been activated.. Any help much appreciated. Will delete post when I work this out cheers

[Will]

My other projects are nearly completed now. Missed the boat for applying to RW this year but I see they have introduced a featherweight category now. So that will be my target to build something in that size range. I'll aim for sub 10kg which gives plenty of space for finding it doesn't have enough armour/battery/rigidity.

Im happy to gang up with someone else who has better ideas for me or with some experience of build these. I've got good electrical knowledge and general engineering skills (just rebuilt an MG with an alternative engine and got it MOT'd) but almost zero experience in the radio controlled world.