Justin Lawyer and I were at Mudock last weekend and we really wanted to see the new Aerotech I49 fly. Gary and Karl were there and they had a demo motor, but we did not have an appropriate rocket. The I49 puts out about 10 pounds of thrust for over 7 seconds. If you want the 5:1 thrust to weight ratio you only get to fly a 2 pound rocket and since the motor weighs about 3/4 of a pound you only get 1.25 for the rocket. Add to that the fact that the weight of the motor moves the CG pretty far aft and you need to use some care to get a stable flight.
What really made it fun was that we were at Black Rock and had only what we had in our kits and what we could buy from the two on site vendors. Plus, I'm a very cheap guy and this rocket needed to not break the bank.
We decided that we should go with a MasterCard theme:
4 feet of 38mm cardboard tube - $6
lightest 38mm nose cone Jack had - $15
18" parachute - $7
odds and ends - $4
tube fins - free (thanks Jack)
MAWD altimeter - borrowed from my Wildman Jr
I49 motor - free (thanks Aerotech)
7 second burn on a tiny little cardboard rocket - priceless!
Mike
What really made it fun was that we were at Black Rock and had only what we had in our kits and what we could buy from the two on site vendors. Plus, I'm a very cheap guy and this rocket needed to not break the bank.
We decided that we should go with a MasterCard theme:
4 feet of 38mm cardboard tube - $6
lightest 38mm nose cone Jack had - $15
18" parachute - $7
odds and ends - $4
tube fins - free (thanks Jack)
MAWD altimeter - borrowed from my Wildman Jr
I49 motor - free (thanks Aerotech)
7 second burn on a tiny little cardboard rocket - priceless!
Mike
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