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portable collapsible rocket stove heater/stove/pizza oven

Discussion in 'Non-EPA Woodstoves and Fireplaces' started by BrianK, Apr 27, 2017.

  1. FatBoy85

    FatBoy85

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    Yes I would agree that since the heat is good outside, the wood doesn't need to "work as hard", like a bbq, it doesn't drop off as quick. But I wouldn't be smoking cheese in there anytime soon! :eek:
     
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  2. BrianK

    BrianK

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    I didn't get around to the hardwood firewood test yet, but I did burn 1/2" x 3" pine boards and packed the firebox, leaving air channels between the stacks. It didn't get near as hot (620 barrel top within 20 minutes of lighting fire, pizza oven 450 an hour after lighting fire) or burn near as long.

    Barrel top was down to 340 at two hours and then it rained [​IMG] But there was still fire in the firebox at 3 hours after lighting (last photo.) IMG_1195.JPG
    IMG_1206.JPG
    IMG_1229.JPG
     
    Last edited: Aug 3, 2017
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  3. BrianK

    BrianK

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  4. BrianK

    BrianK

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  5. BrianK

    BrianK

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    I rearranged the fire path again and the barrel top got 90 • F hotter, up to 865• from 774• (even though outside temps have fallen to 65• this evening, and prior tests days were hot and sunny in the mid 80s.)

    You can see the strength of the natural draft here through the small viewport in the side of the firebox. The flames are moving/drawing so fast they're horizontal. IMG_1315.JPG

    Edit to add:
    At two and a half hours since ignition, barrel top temp is 400• and the firebox is still just less than half full.
     
    Last edited: Aug 5, 2017
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  6. BrianK

    BrianK

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    I finally had a chance to run a batch of hardwood firewood today, a combination of 6 pieces of ash, oak and cherry. The wood was well seasoned but unfortunately uncovered and with recent rains it didn't perform much better, hotter or longer than the (very dry) pine boards, with approximately the same barrel top temps and duration of burn, three hours and 560• on top after a half hour.

    The compressed sawdust bricks still hold the record with almost 6 hours burn times and 865• barrel top temps. Wood stove users don't necessarily relate extended burn times with the compressed fire bricks but they sure seem optimal in this rocket stove application and they are the only way I can accurately compare changes in firebox and riser geometry and primary and secondary air adjustments.
     
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