No particular effort had been made to maximize the specific impulse, that not being the reactor's purpose, but pewee achieved a vacuum specific impulse of 901 seconds (8.84 km/s), well above the target for nerva. 25, 1969 and failed on pad. Ideal vacuum specific impulse is reported throughout this document
The calculated value assumes an infinite nozzle expansion ratio, without losses, discharging into a perfect vacuum. Upper stage malfunction prevented payloads from leaving earth orbit It also is very lightweight plus much more reliable.
The specific impulse is defined as the total impulse divided by the weight of the propellant. Pdf version also available for download. E reactor (500 mwth) achieved the highest peak chamber temperature (2750 k) nd specific impulse (901 seconds in vacuum) In summary, the program demons
Your first source gives a temperature of almost half your second source Do you think this is because of the high pressure lowering the dissociation t? 23, 1969 and reentered sept 22, 1969 and reentered oct