nialloswald
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- Joined
- Sep 2, 2004
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4 E9's is a nice combination, the long burn is great!
Even better CHAD-stage 2 of the E9's from D12's, gives you ~150Ns of BP power and a ~5 second burn. I've flown this combination 3 times now, with significant horizontal velocity it puts my fairly large and heavy rocket ~1600ft up.
Depending on the weight of the rocket, you might have to watch the wind though - after the intial peak of thrust, acceleration is pretty sluggish. Luckily the D12's hanging off the back give my rocket a small margin of stability, and its not until they drop that it heads into the wind!
https://www.bits.bris.ac.uk/niall/gallery/view_album.php?set_albumName=EARSMarch2005&page=8
The staggered combination of motors makes for an interesting acceleration graph!
Even better CHAD-stage 2 of the E9's from D12's, gives you ~150Ns of BP power and a ~5 second burn. I've flown this combination 3 times now, with significant horizontal velocity it puts my fairly large and heavy rocket ~1600ft up.
Depending on the weight of the rocket, you might have to watch the wind though - after the intial peak of thrust, acceleration is pretty sluggish. Luckily the D12's hanging off the back give my rocket a small margin of stability, and its not until they drop that it heads into the wind!
https://www.bits.bris.ac.uk/niall/gallery/view_album.php?set_albumName=EARSMarch2005&page=8
The staggered combination of motors makes for an interesting acceleration graph!