0TreeLemur Posted December 19, 2019 Report Share Posted December 19, 2019 I too had a bunch of cold air coming from somewhere in our 1967 C. It seemed to be coming from the overhead area. So during a test flight last weekend I discovered the source. The problem was a major air leak where the tubular steel frame penetrates the dorsal air plenum under the plastic overhead panel. The tape covering that hole was removed when they did the 208B corrosion inspection last summer and not replaced. I taped it up good. Planning a test flight this weekend to see how much that helped. @steingar you might look there. 1 Quote Link to comment Share on other sites More sharing options...
Marauder Posted December 19, 2019 Report Share Posted December 19, 2019 7 minutes ago, 0TreeLemur said: I too had a bunch of cold air coming from somewhere in our 1967 C. It seemed to be coming from the overhead area. So during a test flight last weekend I discovered the source. The problem was a major air leak where the tubular steel frame penetrates the dorsal air plenum under the plastic overhead panel. The tape covering that hole was removed when they did the 208B corrosion inspection last summer and not replaced. I taped it up good. Planning a test flight this weekend to see how much that helped. @steingar you might look there. Got pictures of the area? Quote Link to comment Share on other sites More sharing options...
Brian E. Posted December 19, 2019 Report Share Posted December 19, 2019 4 hours ago, Marauder said: Got pictures of the area? Would appreaciate a pic as well. Mine is super cold with *no* heat in the back... Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted December 20, 2019 Report Share Posted December 20, 2019 6 hours ago, Marauder said: Got pictures of the area? This picture was taken after I taped it up. Note the tubular steel member coming in from the right. The tape covers a large elliptical hole. 1 Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted December 20, 2019 Report Share Posted December 20, 2019 11 hours ago, 0TreeLemur said: This picture was taken after I taped it up. Note the tubular steel member coming in from the right. The tape covers a large elliptical hole. I put the minimum of tape to close the holes then painted the whole thing with tank sealant. I’ve found the tape comes off eventually. Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted December 20, 2019 Report Share Posted December 20, 2019 1 hour ago, N201MKTurbo said: I put the minimum of tape to close the holes then painted the whole thing with tank sealant. I’ve found the tape comes off eventually. Given the importance of occasional SB-208B inspections, I would not use tank sealant there. The 3M 350 tape I used is made from non-absorptive mylar with excellent adhesive properties. I'll be surprised if it isn't still sticking there years from now. Quote Link to comment Share on other sites More sharing options...
ArtVandelay Posted December 20, 2019 Report Share Posted December 20, 2019 I put the minimum of tape to close the holes then painted the whole thing with tank sealant. I’ve found the tape comes off eventually. Probably Arizona heat has something to do with that.Tom Quote Link to comment Share on other sites More sharing options...
N201MKTurbo Posted December 20, 2019 Report Share Posted December 20, 2019 Just now, ArtVandelay said: Probably Arizona heat has something to do with that. Tom Probably does. I've seen OATs in the hangar of 130 F You can steam it off in FL! Quote Link to comment Share on other sites More sharing options...
tigers2007 Posted December 20, 2019 Report Share Posted December 20, 2019 Honeywell Heat Bud (75 watts on low setting) is on sale at Menards for $9.99. I use this as a cabin heater. 75 watts a day is like $11/mo at my outrageous energy rates. Keeps the cabin and instruments warm. I use a line voltage thermostat to keep it at around 50F. Honeywell 250 Watt HeatBud Ceramic Personal Fan Heater at Menards https://www.menards.com/main/p-1570688895966.htm Edit: I’m going to buy two more and put them inside of my large coolers to keep tools, batteries, and certain chemi’s warm. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
tmo Posted December 20, 2019 Report Share Posted December 20, 2019 21 minutes ago, tigers2007 said: Edit: I’m going to buy two more and put them inside of my large coolers to keep tools, batteries, and certain chemi’s warm. But then it's going to be $33/mo - are you sure you want to do that? ;-) Quote Link to comment Share on other sites More sharing options...
0TreeLemur Posted December 25, 2019 Report Share Posted December 25, 2019 PIREP re: taping up hole in dorsal air plenum. Worked wonders. Much less cold air flow coming out from under plastic panel overhead. Much less drafty in cabin. Much easier to stay warm. Quote Link to comment Share on other sites More sharing options...
Yooper Rocketman Posted December 26, 2019 Report Share Posted December 26, 2019 Here are some simple things I did to get a very nice warm cabin on my Rocket. Obviously, some of the suggestions are Rocket Specific, but several of them , especially the Styrofoam on the back panels and vent covers, worked great on my F-Model too. (And, just to be clear, the Styrofoam is "winter baggage", not a mod. :>) ) Tom https://mooneyspace.com/profile/13694-yooper-rocketman/?status=724&type=status 1 Quote Link to comment Share on other sites More sharing options...
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