Sent a couple of emails to TRA and Aerotech to see if there is any actual measured temp data available for the external case temps as recorded during motor certification.
I've reviewed several recent motor certification test data sheets on the Tripoli website and I can only see a "pass" statement with regard to the NFPA 1125 section 7.4.1 external case temp requirements. As the "shall not exceed" requirements are either 200, 220 or 316 degrees C, n
"Common sense" says there should not be a problem here because many, many level 3 F/Glass motor mount tubes and MD airframes have been flown over the years with big, hot motors. So, we'd have heard all about it and if there was a problem then kits would have been redesigned if the case temps were cooking the epoxy resins out of the F/Glass matrix. Wouldn't we?
The reason I'd like to know more actual data is that I'm preparing a build plan to roll a composite material motor mount tube for an M class motor, using a commercially available Bio-Epoxy rather than the more traditional products like West Systems. To help me assess its safe use in this particular component, I'd like to understand the typical operating temperatures that the Bio-Epoxy composite MMT would need to be capable of sustaining, all while retaining its structural integrity.
Anyone got an insight into this topic?
I've reviewed several recent motor certification test data sheets on the Tripoli website and I can only see a "pass" statement with regard to the NFPA 1125 section 7.4.1 external case temp requirements. As the "shall not exceed" requirements are either 200, 220 or 316 degrees C, n
"Common sense" says there should not be a problem here because many, many level 3 F/Glass motor mount tubes and MD airframes have been flown over the years with big, hot motors. So, we'd have heard all about it and if there was a problem then kits would have been redesigned if the case temps were cooking the epoxy resins out of the F/Glass matrix. Wouldn't we?
The reason I'd like to know more actual data is that I'm preparing a build plan to roll a composite material motor mount tube for an M class motor, using a commercially available Bio-Epoxy rather than the more traditional products like West Systems. To help me assess its safe use in this particular component, I'd like to understand the typical operating temperatures that the Bio-Epoxy composite MMT would need to be capable of sustaining, all while retaining its structural integrity.
Anyone got an insight into this topic?