My New Crawford!

scalabro wrote:I've been Runnin low and slow for several weeks now.

I find that I don't get the same type of ash as on a hot burn. Not the same as what I experienced last season with the C20. Not as much bridging with stove coal, I find, or could this be due to low firepot temps?

Bridging was a good thing with the 20. You could really get the ash out by opening the clinker door and cleaning with a piece of 1/4 inch steel rod. It was like a game every morning to try and get as much ash out as I could before the roof fell in!

I find the 40 is not as quick cleaning as the 20, I guess due to the mongo sized pot.

The one thing I would like, but to my knowledge they do not exist, is a internally bypassed stove like the Crawford 20,30,40,50 with prismatic grates.

I have found two different ash types between running cool and hot with both stove and nut size coal. Hotter gives me almost all powder where cooler gives me some unburned coal (with nut only).

I get bridging with nut or a 50/50 mix of nut and stove. With all stove, no bridging.

Well that's some good info Pancho, thank you. It will be interesting what my results are when it gets cold out.

A pic of my MPD can be seen way back in the beginning of this thread. It's an old one that Emery gave me. It has a stud mounted, removable wooden handle, and has one oval hole that is 5&1/2 inches in diameter. So there is about 1/4 inch gap all the way around in the 6 inch exhaust pipe.

I'm looking forward to 20* and below!

Ok, I posted this data in the "Thermometer" thread, but since it's from a Crawford 40 I'm posting it here again.

This stove is about as big as I can realistically install in my house and let me tell you that at these numbers it is throwing out the heat, big time. Keep in mind it's not at full throttle
On the 17 degree overnight the other day, I left the stove at this setting and woke up to a 72 degree house.

I'm happy

OAT, 27
Base mode
Primary @ 1/8 inch open
Secondary closed
Check closed
MPD closed
Draft .02

Rutland temp gauges;

Upper 425
Lower 500

IR;

Upper 404
Lower480

Breech IR, 6 inches before MPD, 150

IR, 12 inches after MPD, 130

IR, 24 inches past MPD, 111

Gas temp, breech, 6 inches before MPD, 247

Gas temp, 12 inches after MPD, 223

Gas temp, 24 inches past MPD, 185

NICE !!

i have to agree that with stoves of this type and general size at the stove / stack and Mano. #'s shown there is a CONSIDERABLE amount of heat being produced and plenty left in reserve.

Cold outside (20*F)

Warm inside (76*F)

Cruising @ 500*F

Thank you Walker & Pratt

You can't beat that.
It's currently 13 right here at my house. My Crawford is at 475, stack at 110. I won't have to touch it until late tomorrow afternoon. Tomorrow morning I will enjoy my morning entertainment by watching the neighbor across the street lugging in his wood.
With all the troubles of life, it's really nice when you get the payoff.

scalabro wrote:Gas temp, breech, 6 inches before MPD, 247

Gas temp, 12 inches after MPD, 223

Gas temp, 24 inches past MPD, 185

Just wondering how you are getting the gas temperatures.

Lightning wrote:

scalabro wrote:Gas temp, breech, 6 inches before MPD, 247

Gas temp, 12 inches after MPD, 223

Gas temp, 24 inches past MPD, 185

Just wondering how you are getting the gas temperatures.

Lee,
A Lab calibrated digital thermometer with two types of thermocouples.

Today I'm headed south to Westchester County to my B-I-L's Greek Club. So I thought I'd try an experiment over the next 24 hours.

Wifey and girls are staying put on this one and I've asked then to keep me informed on stove ops/temps.

I just finished a thorough shake and top off (Blashack stove size) on the Crawford 40. I closed up everything except the secondaries. I've asked wifey to close them in a few hours. I set the MPD at .04 The internal check is closed. She's currently @ 400* but will settle at around 250 depending on OAT for the next 24 hrs.

I should get home tomorrow around lunch.

I want to see if she can go that long untouched and still shake and reload.

Fingers crossed!

That stove will be glowing and ready to go when You get back.

scalabro wrote:Today I'm headed south to Westchester County to my B-I-L's Greek Club. So I thought I'd try an experiment over the next 24 hours.

Wifey and girls are staying put on this one and I've asked then to keep me informed on stove ops/temps.

I just finished a thorough shake and top off (Blashack stove size) on the Crawford 40. I closed up everything except the secondaries. I've asked wifey to close them in a few hours. I set the MPD at .04 The internal check is closed. She's currently @ 400* but will settle at around 250 depending on OAT for the next 24 hrs.

I should get home tomorrow around lunch.

I want to see if she can go that long untouched and still shake and reload.

Fingers crossed!

Why keep the secondaries open that long?.

[quote="Pancho"]

Why keep the secondaries open that long?.[/quote)

It's just the way the schedule happened to work out this morning with the wife and kids.

26.5 hours later, untouched

Pics show temp and draft.

Just opened MPD, clinker door, base heat damper, and primary air.

Waiting for the coal to get rippin, then I'll shake and load up.

wsherrick wrote:That stove will be glowing and ready to go when You get back.

You are correct again Obi -Wan!

That's awesome! These stoves stoves can really cruise once they get dialed in