- Joined
- Jan 19, 2009
- Messages
- 3,447
- Reaction score
- 1,328
I'll start with the question, then a little history
I want to build a rocket that will go 2 miles (or at least 10K feet)
I also want it to break mach 1
There are several options for this with a minimum diameter rocket - both as kits and as scratch built.
I've simulated a few with Rocksim that will meet my criteria.
I can achieve it with 38mm, but should I go to 54mm?
Now - I have limited budget and I know the 38mm will be a lot cheaper - both for the rocket and the motor.
I already have a 6 grain 38mm CTI case, Egg finder, Raven 2, and a cable cutter to work with.
To go to 54 will require me to purchase a new case (more money) or use the AT DMS
My thoughts are to mount the Egg Finder in the nose followed by the Raven. I am still trying to decide whether to do a "standard" DD or use the cable cutter.
Some history.
I do have my L2, although I tend to prefer LPR/MPR. I can do a lot more flights for less money using these over an HPR flight.
My record so far is 8330' and about 0.8mach on an L1000.
I also prefer SciFi, Fantasy, Oddroc over 3FNC.
And I like to see the entire flight. Hopefully the Egg Finder will help me with the recovery.
To achieve my goal I will need a 3FNC that will probably go out of sight -
My main reason for doing this is once or twice a year I go to events where I am asked to display some of my rockets.
So I am mostly doing this rocket for "bragging rights". Look - you can build rockets that go this high and this fast!
Assuming I get it back successfully, I doubt I will fly it again. And I don't think I will continue to push the envelope and go for 3 miles and/or break mach 2.
I also have not done any fiberglassing, so I want to be able to build stock and not have to fiberglass anything to hold it together (including tip to tip)
Which to me seems another good reason to stay with 38mm. The 54 may provide too much stress without reinforcement.
I recognize that with a 38mm minimum diameter things will be tight, but I should be able to fit everything.
I also hope to use the fly away guides to minimize drag during the flight.
Anything I have not considered or should be aware of before I make a final decision?
Thanks in advance for feedback
I want to build a rocket that will go 2 miles (or at least 10K feet)
I also want it to break mach 1
There are several options for this with a minimum diameter rocket - both as kits and as scratch built.
I've simulated a few with Rocksim that will meet my criteria.
I can achieve it with 38mm, but should I go to 54mm?
Now - I have limited budget and I know the 38mm will be a lot cheaper - both for the rocket and the motor.
I already have a 6 grain 38mm CTI case, Egg finder, Raven 2, and a cable cutter to work with.
To go to 54 will require me to purchase a new case (more money) or use the AT DMS
My thoughts are to mount the Egg Finder in the nose followed by the Raven. I am still trying to decide whether to do a "standard" DD or use the cable cutter.
Some history.
I do have my L2, although I tend to prefer LPR/MPR. I can do a lot more flights for less money using these over an HPR flight.
My record so far is 8330' and about 0.8mach on an L1000.
I also prefer SciFi, Fantasy, Oddroc over 3FNC.
And I like to see the entire flight. Hopefully the Egg Finder will help me with the recovery.
To achieve my goal I will need a 3FNC that will probably go out of sight -
My main reason for doing this is once or twice a year I go to events where I am asked to display some of my rockets.
So I am mostly doing this rocket for "bragging rights". Look - you can build rockets that go this high and this fast!
Assuming I get it back successfully, I doubt I will fly it again. And I don't think I will continue to push the envelope and go for 3 miles and/or break mach 2.
I also have not done any fiberglassing, so I want to be able to build stock and not have to fiberglass anything to hold it together (including tip to tip)
Which to me seems another good reason to stay with 38mm. The 54 may provide too much stress without reinforcement.
I recognize that with a 38mm minimum diameter things will be tight, but I should be able to fit everything.
I also hope to use the fly away guides to minimize drag during the flight.
Anything I have not considered or should be aware of before I make a final decision?
Thanks in advance for feedback
Last edited: