Re: KR> Cabin heater
My cabin heater is the bottom mount Revmaster oil cooler. I made a shroud that blocks off one third of the oil cooler air exhaust. The shroud has a SCAT tube going to a A/C Spruce 2-inch air flap valve, mounted on the fire wall. The off position vents overboard to the back of the cowl. The variable on position, controlled by a Bowden cable knob in the cockpit, is SCAT ducted through the fire wall and down below the instrument panel. Coldest temperature operated so far was 28 degrees F. This heater arrangement works quite well. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA -- Has anyone considered using the oil cooler for cabin heat? What do you see as Pros and Cons (diminished chance of exhaust fumes, etc.)? Thanks, Rodger -- ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Cabin heater
Chris Gardiner wrote: > Do you have a link to your VW heater muff on your web site? > Mine has never been very effective using ram air from the nose bowl . Maybe I > need a two stage setup to get more heat? > Canadian winters are a lot colder than the US south. I don't have anything on the VW heat muff, but it's the same concept as what I did on the Corvaira simple rolled up piece of aluminum with a piece of 2" aluminum tubing welded to it to connect to the heat muff (see the photo in the middle of http://www.n56ml.com/corvair/airbox/), with a piece of stainless welding wire rolled into a spring as a spacer. It's "clamped" by two pieces of safety wire wrapped around top and bottom to hold it together and in place. It's controlled by an off-the-shelf butterfly from Aircraft Spruce, which is probably on that same page somewhere, mounted to the firewall and cable operated from the panel. My VW version is only about 4" long due to limited straight runs of header pipe, but is still quite effective. It's mounted on rear cylinder, pilot's side, so it's a short piece of SCAT hose away from the firewall, and the outlet is right between the rudder pedals, which directs warm air very nicely towards the pilot! Mark Langford, Harvest, AL ML "at" N56ML.com www.N56ML.com ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Cabin heater
Mark, Do you have a link to your VW heater muff on your web site? Mine has never been very effective using ram air from the nose bowl . Maybe I need a two stage setup to get more heat? Canadian winters are a lot colder than the US south. Thanks Chris Gardiner KR2S Sent from my iPad > On Jan 1, 2018, at 9:02 PM, Mark Langford via KRnet > wrote: > > > Has anyone considered using the oil cooler for cabin heat? What do you see > > as Pros and Cons (diminished chance of exhaust fumes, etc.)? > > Thanks, > > Rodger > > Given that I've never flown behind an oil cooler heated airplane, I'm not > technically qualified to answer this, but I can't imagine how a small 175F > oil cooler can generate anywhere near the heat of a 1350F exhaust pipe. Do > the math on that, and I think you'll agree. And EGT is nice and toasty at > runup. It may take 15 minutes for an oil cooler to get up to temp. I think > if oil coolers worked well as heaters, Volkswagen would have use them rather > than dual exhaust heat exchangers. Try it and let us know how it works > though. I've yet to fly in weather cold too cold for my exhaust muff heated > plane to easily heat the cabin, even in the winter at high altitude with > outside air temps below zero. > > I don't worry much about carbon monoxide. I have a monitor on the panel and > I'm already flying behind a VW, with a header system that I built myself, so > apparently I have a death wish already > > Mark Langford > m...@n56ml.com > http://www.n56ml.com > > > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Cabin heater
> Has anyone considered using the oil cooler for cabin heat? What do you see as Pros and Cons (diminished chance of exhaust fumes, etc.)? > Thanks, > Rodger Given that I've never flown behind an oil cooler heated airplane, I'm not technically qualified to answer this, but I can't imagine how a small 175F oil cooler can generate anywhere near the heat of a 1350F exhaust pipe. Do the math on that, and I think you'll agree. And EGT is nice and toasty at runup. It may take 15 minutes for an oil cooler to get up to temp. I think if oil coolers worked well as heaters, Volkswagen would have use them rather than dual exhaust heat exchangers. Try it and let us know how it works though. I've yet to fly in weather cold too cold for my exhaust muff heated plane to easily heat the cabin, even in the winter at high altitude with outside air temps below zero. I don't worry much about carbon monoxide. I have a monitor on the panel and I'm already flying behind a VW, with a header system that I built myself, so apparently I have a death wish already Mark Langford m...@n56ml.com http://www.n56ml.com ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Cabin heater
I use a 4 row tranny cooler with flare fittings and a 12V muffin fan in my Smith. I specifically built both my O-235 engines with the L2C rear case so that I would have the ports for a cabin oil heater. Craig > On January 1, 2018 at 1:22 PM Rodger via KRnet wrote: > > > Has anyone considered using the oil cooler for cabin heat? What do you see as > Pros and Cons (diminished chance of exhaust fumes, etc.)? > > Thanks, > > Rodger > ___ > Search the KRnet Archives at > https://www.mail-archive.com/krnet@list.krnet.org/. > Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options. > To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
Re: KR> Cabin heater
I think it's a great idea if your engine will make enough heat in the winter. The Velocity series of aircraft use a second oil cooler that is plumbed to the front of the aircraft to use as a heater. That is partially because it would be difficult to duct warm air up to your feet in the front of the cabin from a pusher type configuration. But, they also have a lot more engine than our little KRs and are typically challenged to keep the engines cool in warm weather even with two oil coolers. The O-200 in my KR doesn't even have, or need an oil cooler. When I flew to the southern part of AR a week ago with the temps aloft around 25°, my oil temp only made it up to 160° even with the cowl flap closed. With an oil cooler, the engine temp would be much cooler (which is not good for the engine) and it's unlikely it would make as much heat as I get from the small exhaust heat exchanger I'm already using. In my SuperCub clone (O-320), even with a vernatherm I have to tape over 2/3 of the oil cooler this time of year to get a reasonable oil temperature. I used an exhaust from a Grumman Cheetah with a 4 into 1 muffler based heat exchanger that makes a ton of heat. No question the muffler type heat exchanger works better in a drafty plane like the Cub. As part of the annual inspections, I remove the shroud from the heat exchangers to look at the condition of the muffler/heat exchanger. With the straight pipes on the KR, I don't get as much heat, but there is little chance that a pipe will burn through and create a CO poisoning issue. With the muffler type heat exchanger on the SuperCub, when the muffler starts to show bending and disfigurement under the heat exchanger shroud, it's time to consider replacing the muffler as it is getting near end of life where it is likely to crack. -Jeff Scott Cherokee Village, AR Sent: Monday, January 01, 2018 at 11:22 AM From: "Rodger via KRnet" To: KRnet@list.krnet.org Cc: Rodger Subject: KR> Cabin heater Has anyone considered using the oil cooler for cabin heat? What do you see as Pros and Cons (diminished chance of exhaust fumes, etc.)? Thanks, Rodger ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
KR> Cabin heater
Has anyone considered using the oil cooler for cabin heat? What do you see as Pros and Cons (diminished chance of exhaust fumes, etc.)? Thanks, Rodger ___ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
