Pietenpol-List: Re: mat'l sent
Posted: Mon Oct 25, 2004 9:55 pm
Original Posted By:> Borodent
Subject: Pietenpol-List: Re: mat'l sentHenry,I suggest that you plan to use the insulation blanket in a "sandwich" assembly between plywood firewall and sheet metal (stainless or galvanized steel).In my case, the original fuselage builder used a 1" thick solid plywood firewall. So for weight savings, I ended up cutting lightening holes in it. SoI plan to use a very light gauge sheet metal backing to prevent the ceramic fibersfrom molting off inside the cabin. Since the ceramic fiber material can compress, I believe it would be natural for it to compress from 1/2 inch down toabout 1/4 inch. This should work just fine, but the less you compress it, probably the better job it will do as an insulator. Spacers would help ensurethat you don't compress the material excessively. I don't think it's necessaryto use an adhesive like liquid nails. Instead, I think screws with large light-weight wachers or even staples would suffice to hold things in place untilyou can attach your sheet steel firewall. The sheet metal should be designed topermanently clamp the blanket in place and hold it against the wood. The engine mount attach fittings pose a challenge for trimming and fitting the sheetmetal firewall, but I expect to have to do some creative bending and attachment in that area to keep as much insulation material against the wood aspossible. Keep in mind the intent of the insulation when you are designing yourparts and you'll do fine.I hope this helps.I am copying this letter to the Pietenpol email list since there were several who bought the ceramic material from me.Terry B.***********************************************************In a message dated 10/25/2004 7:54:20 PM Central Standard Time, Borodent writes:> Subj:Re: mat'l sent > Date:10/25/2004 7:54:20 PM Central Standard Time
Subject: Pietenpol-List: Re: mat'l sentHenry,I suggest that you plan to use the insulation blanket in a "sandwich" assembly between plywood firewall and sheet metal (stainless or galvanized steel).In my case, the original fuselage builder used a 1" thick solid plywood firewall. So for weight savings, I ended up cutting lightening holes in it. SoI plan to use a very light gauge sheet metal backing to prevent the ceramic fibersfrom molting off inside the cabin. Since the ceramic fiber material can compress, I believe it would be natural for it to compress from 1/2 inch down toabout 1/4 inch. This should work just fine, but the less you compress it, probably the better job it will do as an insulator. Spacers would help ensurethat you don't compress the material excessively. I don't think it's necessaryto use an adhesive like liquid nails. Instead, I think screws with large light-weight wachers or even staples would suffice to hold things in place untilyou can attach your sheet steel firewall. The sheet metal should be designed topermanently clamp the blanket in place and hold it against the wood. The engine mount attach fittings pose a challenge for trimming and fitting the sheetmetal firewall, but I expect to have to do some creative bending and attachment in that area to keep as much insulation material against the wood aspossible. Keep in mind the intent of the insulation when you are designing yourparts and you'll do fine.I hope this helps.I am copying this letter to the Pietenpol email list since there were several who bought the ceramic material from me.Terry B.***********************************************************In a message dated 10/25/2004 7:54:20 PM Central Standard Time, Borodent writes:> Subj:Re: mat'l sent > Date:10/25/2004 7:54:20 PM Central Standard Time