#1
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Moving up to 3/16 rod.
With the addition of two new rockets, I am moving up to mid power.
Having never flown them, I have no idea how long to make the launch rod. They have 3/16 launch lugs so I bought a 3/16" piece of rod (6 foot long). So, what length should I cut it? __________________________________________________ ____ |
#2
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Run some simulations of what you want to fly and the motors to get what your lower acceptable range is (how far does the rocket need to travel to get up to about 40 feet/second).
That said, was is the max range your vehicle will accept. Then you might split the difference. That is just one approach though. I'm not sure I would cut it less than 3 feet though. Greg |
#3
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Quote:
If you want to go longer, I recommend going up to 1/4", which can be used reliably up to 6', but storage and transport can become problems - they tend to get bent when they're longer than 4'. I've seen folks have them cut in two and machined so that the halves screw together, but getting a perfect alignment is iffy - there tends to be a slight step due to misalignment at the joint. BTW, for mid-power (E-F-G), I like to start with 1/4". Doug .
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YORF member #11 |
#4
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I was thinking 4' would do, but wanted to be sure. And if I use my wood launch pad, 4-6" will be under it hitting the ground.
The first rocket, I won in a raffle, came with 3/16" lugs and a D/E dual engine mount. The next one, a 2X Goblin, I just went with the same size launch lug. ________________________________________ |
#5
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Move all the way to 1/4". The standards for rods going forward should be 1/16" x 12" (Micromax and similar), 1/8 x 36" (1/4A-D) low mass rockets under a pound. 1/4" x 47" for higher power and higher mass rockets up to about 5 pounds or an H. 1/2" x 70" for larger rockets or motors.
Standardization of launch pads and equipment is an important thing. By intentionally forsaking 3/16" and 3/8" it simplifies things greatly. Just a suggestion form the people at Jerry |
#6
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Best bet is a 1/4"x 6' stainless steel rod.
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Enjoy life, it has an expiration date. |
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