lcorinth
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- Aug 5, 2014
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I'm nearly done with my latest scratch build, a two-stage rocket meant to carry a camera in a balsa transition. The payload bay is made of a PNC 80, a 3-inch length of 2.6 inch BT80, and the 80/60 balsa transition.
Here's a picture:
The hole in the transition is for the camera view.
The nose is attached to the body tube section itself, after having a bit of the shoulder end cut off so everything would fit. Having seen that, I thought, "Heck, there's room in there for an altimeter!"
Just about to drill a 1/16 inch vent hole, and I thought I should do a bit of reading.
Now, I'm not sure I can bother. Since the tube is only 3 inches long and 2.6 in diameter, and the altimeter would sit on top of the transition, the furthest back it could be from the nose-to-tube joint is about an inch and a half. I've read you need to have a vent hole at least 3-4 diameters from that joint - not possible with this payload bay.
I wanted to ask, how much would it throw off the readings if I did install one? I like the idea of having a payload bay with more than one function (this is my first time putting any payload in a rocket that isn't an egg), but if the readings are going to be wildly inaccurate, I don't think I'll bother.
Thanks!
Here's a picture:
The hole in the transition is for the camera view.
The nose is attached to the body tube section itself, after having a bit of the shoulder end cut off so everything would fit. Having seen that, I thought, "Heck, there's room in there for an altimeter!"
Just about to drill a 1/16 inch vent hole, and I thought I should do a bit of reading.
Now, I'm not sure I can bother. Since the tube is only 3 inches long and 2.6 in diameter, and the altimeter would sit on top of the transition, the furthest back it could be from the nose-to-tube joint is about an inch and a half. I've read you need to have a vent hole at least 3-4 diameters from that joint - not possible with this payload bay.
I wanted to ask, how much would it throw off the readings if I did install one? I like the idea of having a payload bay with more than one function (this is my first time putting any payload in a rocket that isn't an egg), but if the readings are going to be wildly inaccurate, I don't think I'll bother.
Thanks!