rocketsam2016
Well-Known Member
- Joined
- Aug 31, 2016
- Messages
- 270
- Reaction score
- 5
Hey folks,
I was planning on building my first HPR 2 stage rocket in late 2018 and had been eying the Madcow Doubleshot. Madcow has a great deal coming up though on a new 4"/1.6" Nike Apache kit (4" booster with 54mm mmt, 38mm sustainer with 29mm mmt).
I'm a little worried though that
1) It'll be pretty cramped for electronics/wiring compared to the double shot - my electronics plan is roughly to have a quantum in the interstage for stage separation and booster chute, a quantum in the sustainer ebay for sustainer ignition and apogee, and then another altimeter (possibly quantum, possibly not) dedicated to backup apogee and then the main event. Having to get creative with layout will make a first-time HPR 2-stager harder for sure. Hard is fun of course though
2) It's not going to be able to go nearly as high as the double shot, due to the 54mm/29mm MMT compared to 75mm/38mm. This is probably not the end of the world for me - my main field has a 10k waiver, but a quick openrocket model I put together suggests that the apache kit might not even be able to break mach by much and might not go higher than 12k feet on the biggest CTI motors. This is a bit of a bummer if I ever wanted to make a trip to some place with a higher waiver.
On the plus side, it is a fantastic bargain, I think it looks swank, and the smaller MMT sizes mean it's less scary if something goes wrong and less expensive if lost.
Are other folks eying this kit? Anyone else have thoughts?
I was planning on building my first HPR 2 stage rocket in late 2018 and had been eying the Madcow Doubleshot. Madcow has a great deal coming up though on a new 4"/1.6" Nike Apache kit (4" booster with 54mm mmt, 38mm sustainer with 29mm mmt).
I'm a little worried though that
1) It'll be pretty cramped for electronics/wiring compared to the double shot - my electronics plan is roughly to have a quantum in the interstage for stage separation and booster chute, a quantum in the sustainer ebay for sustainer ignition and apogee, and then another altimeter (possibly quantum, possibly not) dedicated to backup apogee and then the main event. Having to get creative with layout will make a first-time HPR 2-stager harder for sure. Hard is fun of course though
2) It's not going to be able to go nearly as high as the double shot, due to the 54mm/29mm MMT compared to 75mm/38mm. This is probably not the end of the world for me - my main field has a 10k waiver, but a quick openrocket model I put together suggests that the apache kit might not even be able to break mach by much and might not go higher than 12k feet on the biggest CTI motors. This is a bit of a bummer if I ever wanted to make a trip to some place with a higher waiver.
On the plus side, it is a fantastic bargain, I think it looks swank, and the smaller MMT sizes mean it's less scary if something goes wrong and less expensive if lost.
Are other folks eying this kit? Anyone else have thoughts?