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James Maher wrote:
Ernest,
It looks like you put a lot of effort into this ducting design.
I really hope that it works as intended.
Did you check the heat distortion temp of the resin that you used?
Generally they are around 200F+-25F.
This would be a concern as the temps could get that high in that area and you would not want the ducts melting.
It's a valid concern, Jim. Fortunately, I'm not blazing any new trails here. Several of the canard guys that are flying have done it this way. Just talked to Steve Brooks this weekend (he helped me with a very large layup) to confirm it. The saving facts are that the MGS epoxy system I'm using has a max TG of 230F and that the coolant temp isn't the duct/housing temp. There will be a lot of airflow that will keep the housing several degree cooler.
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