Re: New owner F24R-46 needs carb heat info

tandemtrainer · Post by **tandemtrainer** » Sun Dec 20, 2009 9:15 pm

'I just acquired a F-24 with A 200 hp. Ranger. It hasn't been flown since 1992 when the previous owner removed a pair of cylinders. I'm doing well figuring the pile of parts out, but what does the engine do for carb heat? I found the flap on the airbox, but no heat muffs??? Also, where do you get cabin heat? I have the valve on the firewall, nothing else.'

Mike Danielle · Post by **Mike Danielle** » Sun Dec 20, 2009 9:43 pm

'I remember when I first saw the heat box and how I was puzzled too. The
heat comes from the #6 cylinder and works quite well despite our prejudices
towards exhaust-muff heaters. Interestingly, the first engine on my
experimental Great Lakes came from a Grumman Widgeon and the carb heat came
from a plenum that went under the engine to a port on the exhaust shroud. A
convention looking cylindrical mixer box provided the heat to the carb. No
filter however, so I changed to the PT box.

You'll need the o'haul manual for reinstalling the new jugs and timing the
cam - ESSCO has them. Another surpirse - no timing marks!!

Fret not, just follow the manual.

Can't help with the cabin heat 'cause I aint got no cabin.

Ranger Mike

----- Original Message -----
From: "tandemtrainer"
To:
Sent: Sunday, December 20, 2009 7:14 PM
Subject: [fairchildclub] New owner F24R-46 needs carb heat info

>I just acquired a F-24 with A 200 hp. Ranger. It hasn't been flown since
>1992 when the previous owner removed a pair of cylinders. I'm doing well
>figuring the pile of parts out, but what does the engine do for carb heat?
>I found the flap on the airbox, but no heat muffs??? Also, where do you get
>cabin heat? I have the valve on the firewall, nothing else.
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

'

tandemtrainer · Post by **tandemtrainer** » Mon Dec 21, 2009 6:25 am

'--- In fairchildclub@yahoogroups.com, "Mike Danielle" wrote:

>
> I remember when I first saw the heat box and how I was puzzled too. The
> heat comes from the #6 cylinder and works quite well despite our prejudices
> towards exhaust-muff heaters. Interestingly, the first engine on my
> experimental Great Lakes came from a Grumman Widgeon and the carb heat came
> from a plenum that went under the engine to a port on the exhaust shroud. A
> convention looking cylindrical mixer box provided the heat to the carb. No
> filter however, so I changed to the PT box.
>
> You'll need the o'haul manual for reinstalling the new jugs and timing the
> cam - ESSCO has them. Another surpirse - no timing marks!!
>
> Fret not, just follow the manual.
>
> Can't help with the cabin heat 'cause I aint got no cabin.
>
> Ranger Mike
>

Thanks, Mike
That answers a lot. There is a hole in the exhaust plenum, no flange or tube though. Must be for cabin heat. I got the Fairchild owners manual, Ranger engine manual, and Ranger parts manual with the aircraft. I need a F-24 parts book if one exists. I do have a spare PT engine mount and oil tank for trading stock.
Steve N1010W s/n 46-253'

Bob · Post by **Bob** » Mon Dec 21, 2009 7:05 am

'tandemtrainer,

Carbheat on a 24 is just air from inside the cowling. What you have is all there is. I fly in Minnesota in all sorts of conditions that would ice up small Continentals, and I never use carb heat -- never needed it. The original Ranger had a 'hot tube' running from to light side of the exhaust manifold to the left side of the intake manifold. Seventy years ago, someone figured that having hot flames ported into the intake manifold was not a very good idea, so there was an AD to remove the tube and block the hole.

Fairchild 24 has no source of cabin heat. PT-26 had holes in the exhaust manifold with a tube running through them with an 'air intake' in the front and a hose in the back that went into the cabin. I have heard that this was effective for a heat source, but that there is a LOT of cold air flowing in the cabin.

I installed a cigarette lighter outlet in my 24, and plug in a 12volt electric blanket. Works great.

Bob Waldron
Webster, MN
1939 Fairchild 24 K

--- In fairchildclub@yahoogroups.com, "tandemtrainer" wrote:
>
> I just acquired a F-24 with A 200 hp. Ranger. It hasn't been flown since 1992 when the previous owner removed a pair of cylinders. I'm doing well figuring the pile of parts out, but what does the engine do for carb heat? I found the flap on the airbox, but no heat muffs??? Also, where do you get cabin heat? I have the valve on the firewall, nothing else.
>

'