I have designed a thermostat controlled heater that fits inside of the 1077 stock. The thermostat maintains the temperature between 70-85 F (20-30 C). This should keep your gas pressure at about 850-1000 PSI, yet be very safe.

Remember:
CO2 pressure (Pounds per square inch) at some temperatures (degees F):
- 969 PSI at 80 F
- 853 PSI at 70 F (about 25 deg C)
- 747 PSI at 60 F
- 567 PSI at 40 F
- 491 PSI at 30 F (about 0 deg C)
- 422 PSI at 20 F
- 306 PSI at 0 F
Link:
http://www.airsmith.com/co2n2/co2graph.htm

It is powered with 12 volt battery or 12 volt wall transformer. With a 12V-500mA-6watt (small) wall transformer, the heating elements go over 85 F (30 C) in 30 seconds.

Actually you can have it run at a higher temperature if you like, by repositioning the thermostat away from the heating elements and CO2 Cartridge. The heater and theromstat fit in the rifle stock under the CO2 cartridge. There are several places to bring the wires out. I think it would be best to leave this to your choice.

I should state here, I hope to sell a few of these kits. I'm an Electrical Engineer who got laid off from a big company 2 years ago and haven't found work since. I think I can buy the parts, organize, solder and generate instructions to make it easy to install. I think I can do it cheaper than if I just told you where to order the parts. I'm thinking $25 USD for the basic parts ready to install. More-if people want ON/OFF switches, connectors, wall transformers, etc. Also I can customize the parts for your climate/situation. If you are shooting at 6 deg F (-25 deg C) we would need to boost the power input for your application.

12 volts allows you to hook up to the cigarette lighter in your car or use with a 12 volt rechargeable battery from Radio Shack or elsewhere.
Auto cigarette lighter hook up wire:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=270-1533

A 12v-1300mAh rechargable battery ($15 USD) should provide heating for over 3 hours (this could vary depending on the outside temperature). I should also say, you can run it at other voltages as the parts are not voltage sensitive. See the Radio shack batteries below:
http://www.radioshack.com/category.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F009%5F014%5F008%5F000&Page=1

If you e-mail me put "1077 GUN" in the title. I get so much SPAM I delete messages quickly that I don't recognize.

Anyway, I plan to please if you're interested.

My e-mail address is: metal@comcast.net

Summary: I believe that users of the CO2 Heater can expect full CO2 pressure and full Pellet Velocity while shooting in temperatures down to about 35 F (3 C). If you use additional insulation around the stock in the CO2 area (like foam pipe insulation) you may extend the performance to even lower temperatures. I suspect at any low temperature, the CO2 cartridge will be about 40+ F (25+ C) warmer than without the heater. This heat rise with double CO2 pressure and pellet velocity. See test data below.
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We finally got some cool weather (32 F / 0 C) here in Dallas, so I ran some tests to determine the performance of the CO2 Heater. The amount of Heat Loss to the outside was my main concern. This performance will determine at what minimum temperature a user can expect full performance.
Heat Loss: Generated heat is lost through the stock, to the barrel, to the magazine area and down the CO2 cartridge tube.

Preliminary Test: When I started testing the outside temperature was 35 F ( 2 C) with a moderate breeze. The ambient temperature of the gun was 60 F (16 C) at the start of the test.
Preliminary Results: I powered the CO2 Heater and measured the CO2 holding tube after 15 minutes.
It was only 70 F (22 C), but the stock (below the heater was 87F (30 C)!! I didn’t intend to make a hand warmer.

I repositioned the heating elements and got the following results.

Test 1: The outside temperature was now 41 F (5 C) and the gun ambient temperture was 62 F (17 C) at the start of the test.
Test 1 Results: I powered the CO2 heater and measured temperaures after 15 minutes.
The CO2 holding tube temperature was 84 F (28 C) and the stock was 69 F (21 C).

Test 2: I continued Test 1, but installed the pellet Magazine that I had left off earlier and waited 15 minutes.
Test 2 Results: The CO2 tube temperature was now 87 F (30 C). At this temperature the CO2 pressure should be well over 1000 PSI and full performance (pellet velocity) should be expected.

freaking SWEET!Alright man!!! Thats preety dang cool. I dont know about anyone else but I am impressed!!!

k

hey man, as soon sa you have the warmer working perfectly, let us know and how much it will cost. I live in Miami Fl, the temperture here in the summer is around the 90s. I was wondering, because i like to rapid fire sometimes or just to get the best performance, if the temperture out here is good enough not to need a heater. also if u think it will still be a good idea for this heater at the tempertures i live in, let me know. also i use the 4 oz c02 canister, i think thats the bulk or whatever they call it. will ur heater work for that too?

Johnny wants performance