In the USA methanol (CAS #67561) is a HAP (hazardous air pollutant).
Your state environmental agency will not be happy about your discharge
of about 210 lbs of a HAP into the atmosphere. In the concentrations
above I suspect the solution would also be classified as flammable by
OSHA to say nothing of the risk to your glider and youself in the
event of an incident (yes--sparks can happen in a glider accident).

Stay away from the methanol.

Skip Guimond