O'Hara et al. (1972) seem to believe it's basically zero:
http://www.freelists.org/post/arocket/LoxMethane-Monoprop-was-Paper-bounty-was-RE-monopropellants
By the way, does anyone know how to get a hold of the NASA
lox-methane-monoprop bibliography mentioned in the message linked to above?
On 12/02/2015 06:34 PM, Ben Brockert wrote:
Again only tangentially related, but anyone happen to have seen the
critical diameter of mixed LOX/Methane? I still think it's insane to
have it in a tank as a monopropellant, but mixing it and injecting it
into a thrust chamber through porous sintered metal or laser drilled
micro holes could give interesting results if it doesn't explode.