Hybrid design

[Gunner]

I`m planning to do my first hybrid cannon and I have a few question from it:

I will make 500ml chamber and is this good size: 5cm x 25cm?

And the second question , I am not sure but, must there be is chamber fan?

Thanks!

[CasinoVanart]

You may want to do a bit of research first Gunner, start with the Hybrid showcase.
May i ask what types of cannons you have built before?

And no, no fan.

[Gunner]

Combustion cannons and pneumatics...and I have done some research but I have not found yet what I am looking for.

[Gunner]

Hmm, I made my chamber, it is 3cm ID and 20cm long and it is about 150ml and I am planning to use 6x mixes, Is the DDT how possible?

[Hubb]

DDT is very possible with that. I've never experienced DDT (not intentionally) but the research I've done suggests that a long, thin chamber is more prone to DDT than a short, fat one. What OD is the chamber?

[brogdenlaxmiddie]

In this case, I wouldn't be worried about DDT. I would be more worried if your chamber could even take the pressures of a hybrid. You mentioned the diameter and length, but not material. I also don't neccisarrily believe that you should be making a hybrid quite yet. If you were, you wouldn't of asked these questions. However, it is nice that you did ask because that shows you at least care.

[Gunner]

Here is the chamber and the ignition box: http://www.aijaa.com/v.php?i=2470935.jpg

The chamber ID is 30mm and OD 32mm and I think that you can quess what material it is

[SpudFarm]

do not put 6x in that thing, the soldering looks bad..

[bob-a-lu]

i agree with spud farm and u dont need a fan because the fuels pressurated

[SpudFarm]

not because the fuel is under pressure more because it will be mixed with the incomming air and the shot wont go until the disk burst's what so ever

[Gunner]

Well , I will start with 2x mixes and then 3x and... but I put with my 12V compressor 18bar in that and after one hour the pressure was still same .

[SpudFarm]

6x would be more like 40bar

[Gunner]

Yeah I know but now some edit:

I made three shots without barrel: 1x,2x,3x and then it fired every time and the sound... it was like shotgun . I will soon buy the barrel and then the fun begins .

Here is pic: http://www.aijaa.com/v.php?i=2476912.jpg

[SpudFarm]

i would not go over 4x..

but congratts, you made a hybrid

[Gunner]

How possible the DDT would be in 6x?
(I am not trying...yet)