ORIGINAL: pilotpete2
Hi Dar,
Very good points.
I just wanted to add one comment related to baffling and that is, not to open both air intakes on the typical cowl with a side mounted engine, unless of course it's an opposing twin[8D], doing so is guaranteed to reduce airflow over the cylinder with the typical single. I see this all the time with fellow fliers.
Pete
That is correct, Pete.
Another poster in another thread, about two weeks ago, encountered a similar situation.
I suggested that the 'open' cowl intake (on the right-hand side of the plane) be masked closed with a 'dummy cylinder', glued to the front-inside of the cowl.
Only air that 'actively participates' in the cooling process and thus is accordingly directed to achieve this purpose, should be allowed to enter the cowl. It should also be routed out as efficiently as possible.
Although glow engines do achieve a good amount of cooling from the methanol's 'latent heat of evaporation' (and that of nitromethane too), a consistent flow and exchange of air is also required.