Completed Servo Chron Bay

Discussion about deployment systems including altimeters, timers, air speed flaps, servo systems, and chemical reactions.
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Completed Servo Chron Bay

Post by Water Rocket Expert »

I finally got my ServoChron to work. The first time I programmed it two weeks ago, I didn't know exactly how I did it so it could be done agian. Last night I accidentally deleted it from memory but got it working against just like before. I have placed my board, servo, altimeter, batteries which I know I kind of heavy right now, and I will soon try to put a camera in there. Here is my demonstration. Tell me what you think. This is for the axial deployment system.
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Re: Completed Servo Chron Bay

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I got it rigged to my parachute now so I'm hoping today I can get a launch in with a 1.5 liter bottle rocket and a 2 second delay. Does that delay sound good?
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Re: Completed Servo Chron Bay

Post by bugwubber »

Great! can't wait to see it in action. how much pressure are you going to launch with? At 60psi, ballistic flights don't last more than 3 sec.
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Re: Completed Servo Chron Bay

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So is a 2 second delay good or 1 second.
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Re: Completed Servo Chron Bay

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I was thinking like 100 psi. My launcher clamp broke but I can still launch until fixed by tossing a small brick at the launcher base which causes it to launch.
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Re: Completed Servo Chron Bay

Post by bugwubber »

Water Rocket Expert wrote:I was thinking like 100 psi. My launcher clamp broke but I can still launch until fixed by tossing a small brick at the launcher base which causes it to launch.
Brick Assisted Launch. That's a new one!

Just a suggestion- get your launcher fixed!
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Re: Completed Servo Chron Bay

Post by Spaceman Spiff »

bugwubber wrote:Great! can't wait to see it in action. how much pressure are you going to launch with? At 60psi, ballistic flights don't last more than 3 sec.
With the heavy batteries and payload, it might go higher than you think. I would urge him to run it through a simulator to figure out the correct timing. An early deploy can be as bad as no deploy at all.
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Re: Completed Servo Chron Bay

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I'll run it through the Clifford health sim.
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Re: Completed Servo Chron Bay

Post by Water Rocket Expert »

the are the results,

Coast

Drag-free coast 274.0 metres to apogee at 274.5 metres after 7.5 seconds
Actual apogee at 68.03 metres (223.2 feet) after 3.08 seconds

So I'll set the delay for 2 seconds because I don't think it calculates the time the parachute takes to unwind.
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Re: Completed Servo Chron Bay

Post by Water Rocket Expert »

the split collar will take about 3 days to dry with the PL so it won't be fixed today. I may not launch today, because the launch to needs a replacement elbow that I don't have lying around. Besides it's a bit windy here.
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Re: Completed Servo Chron Bay

Post by bugwubber »

Water Rocket Expert wrote:the split collar will take about 3 days to dry with the PL so it won't be fixed today. I may not launch today, because the launch to needs a replacement elbow that I don't have lying around. Besides it's a bit windy here.
What are you gluing on the split collar?

All Purpose (PVC, CPVC, ABS) Cement is what I use on pipe.

I finally made my first gardena launcher. Used wire and JBWeld Putty to attach PVC pull down rings. Set and ready to go in 1 day.
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Re: Completed Servo Chron Bay

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I am using PVC glue for gluing the PVC, but I now am gluing the PVC couplings sides to the metal vice, which does not adhere to PVC using PVC glue. So I am using PL Premium. It dries a bit faster when it is not in an air tight environment like a splice. They fell off from me throwing bricks at it.b WA:
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Re: Completed Servo Chron Bay

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What kind of JB Weld Putty did you use. Steel Stick, plastic weld, water weld?
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Re: Completed Servo Chron Bay

Post by bugwubber »

Water Rocket Expert wrote:What kind of JB Weld Putty did you use. Steel Stick, plastic weld, water weld?
I have both but Steel Stick for this since I used it to cover up the wire. Also added some filets of putty under the pvc rings to hold them in place really well.
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Re: Completed Servo Chron Bay

Post by bugwubber »

Water Rocket Expert wrote:the are the results,

Coast

Drag-free coast 274.0 metres to apogee at 274.5 metres after 7.5 seconds
Actual apogee at 68.03 metres (223.2 feet) after 3.08 seconds

So I'll set the delay for 2 seconds because I don't think it calculates the time the parachute takes to unwind.
2 sec sounds good. I was just looking over my 2 liter/100psi altimeter chart, it hit right at 2sec to apogee.
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