It's all over the map, depending on the accuracy of the injector, the 1KLbF
LR-101 vernier rocket engine is 20".
K
On Thu, Jan 7, 2021 at 6:36 PM Dong Won Lim <lim262@xxxxxxxxxx> wrote:
Holdup I thought the rule of thumb was 45 (somewhere between 40 and 50)
inches for kerosene/RP1? Methane is longer and hydrogen is shorter; though
I’ve never worked with ethanol, a little bird told me that 40 inches is
supposed to work well with a 75% ethanol-water dilution and a 1.45 O:F ratio
Forrest Dongwon Lim
*Purdue University, Class of 2022*
*Mechanical Engineering*
*Undergraduate Research Assistant – CFA Lab*
*Lim262@xxxxxxxxxx* <Lim262@xxxxxxxxxx>* | 281-701-8756*
*From: *roxanna Mason <rocketmaster.ken@xxxxxxxxx>
*Sent: *Thursday, January 7, 2021 7:49 PM
*To: *arocket@xxxxxxxxxxxxx
*Subject: *[AR] Re: Lox - Ethanol(70%) Characteristic Length(L*) advice
Ethanol vaporizes better than Kerosene which has an L* of about 60" but
the injector design has a large bearing on effective vaporization and
combustion in which c* efficiency is also affected.
K
On Thu, Jan 7, 2021 at 4:58 PM 오승환 <shoh95@xxxxxxxxx> wrote:
Hello,
I’m about to build an 1000lbf LPRE with LOx - Ethanol(70%) as propellant.
I’ve been researching with the characteristic length(L*) of these
propellant combination with no success of finding any.
It would be of great help if somebody could help me with this subject.
Any input would be greatly appreciated.
SH