It's inaccurate to link L* to sea level Isp so directly. L* affects c*
efficiency, which is only one component of Isp. Isp is also affected
by Cf efficiency, chamber pressure, expansion ratio, and mixture
ratio.
On Thu, Jan 28, 2021 at 2:18 AM roxanna Mason
<rocketmaster.ken@xxxxxxxxx> wrote:
No. the LR-101 ISP is only 200, that's the price you pay for a low L*.
K
On Wed, Jan 27, 2021 at 1:51 AM Jonathan Adams <jonadams2002@xxxxxxxxx> wrote:
I was wondering about something I thought the insight of this group could
help me with.
For a small liquid propellant rocket engine running Kerosene and LOX, what
would be the consequences of a characteristic length of around only 12
inches?
Could small attitude control thrusters run with an L* as low as that under
reasonable operating conditions (i.e. combustion completion issues, etc)?
I'm wondering since someone here mentioned the Rocketdyne LR-101 engine uses
an L* of 20", yet the texts I've found have RP-1 and LOX L* values much
higher than that, and that made me wonder whether the characteristic length
could be taken even smaller for amateur engines.