So thanks to Dean I got two of the barrel smoker without the flash unit on Saturday at Mississauga. I had a chance to play with it a bit and it is just amazing how noone until now (Stanlley the man !) had thought of this.
In theory all you need to do is to have a proportional smoker, i.e. one with separate leads for the heating element and one for the pump motor. The idea is that with Heng Long BB/Recoil, you already have a mechanical motor to push the barrel/BB piston back, and then the trigger switch would release it and creating the forward motion for the recoil/BB.
So for a barrel smoker, all you are doing is hook up the pump motor to the BB/recoil motor connection, hook up the heating element to the smoker connection, and create a trigger switch. So in sequence what you have to happen is the following:
1. Smoker heating element is heated up and full of smoke waiting for the pump
2. BB/Recoil motor lead starts the pump motor
3. Trigger switch cuts the pump motor.
This is so simple and elegant it is truly amazing. Like I said in theory anyone that has a proportional smoker can DIY this, but Stanlley's heating element is very good, and the pump is the new style from Heng Long (which is actually just just an aquarium pump) which is much quieter and more efficient. Plus all the bits and pieces (like a long silicone tubing and the actual trigger switch) are all very nice, and we should support it simply for the IP. However, we all have the necessary bits in our parts bin to do this.