Post by Esterov on Mar 4, 2017 16:23:48 GMT
I was experimenting with making small drones that could easily be shot from cannons and whatnot when I noticed that I was using 500g of fluorine and 500g of methane. Even though the engine shows a mixture ratio of 9.47 fluorine : 1 methane (by mass)
So I made another variant, where the reaction mass was corrected from 500g fluorine:500g methane to 947g fluorine:100g methane.
The Delta-v changed from 0.801km/s to 0.835km/s (due to the 47 grams of additional reaction mass) and the burn time increased by two seconds. The dry acceleration didn't change at all.
Shouldn't the fluorine run out before the methane and cause a shorter burn?
EDIT: It does actually cause a shorter burn, the 1:1 drones have several hundred m/s of dV left and they suddenly disable themselves due to running out of dV, while the 9.47:1 ones work until the meter hits 0m/s.
The exported designs are attached below.
Brass Ball V22 has 500g:500g
Brass Ball V23 has 947g:100g
So I made another variant, where the reaction mass was corrected from 500g fluorine:500g methane to 947g fluorine:100g methane.
The Delta-v changed from 0.801km/s to 0.835km/s (due to the 47 grams of additional reaction mass) and the burn time increased by two seconds. The dry acceleration didn't change at all.
The exported designs are attached below.
Brass Ball V22 has 500g:500g
Brass Ball V23 has 947g:100g
