Rocket camera for recon, page 1

Here's a recon tool,,,

In my local area i'd be able to do well with an RC sailplane, there's tons of lift and i could get hours of loiter time if need be. Constructed from clear monokote and painted balsa frame, it'll have a bit of visual stealth. Good for not being seen, but not so good for trying to fly.

You'd need some sort of autopilot. There are a few hobby grade autopilots on the market for both planes and helis, or if you're good with electronics i bet you can figure out a way to rig up 3 digital gyros and a GPS to a logic unit.

In the logic unit you'd assign a "box" of airspace in the form of gps values of min/max lat/lon and alt. The gyro will then trim the aircraft to remain in, say, a 1000' bubble of airspace. If you've got a tilt pan cam you can easily loiter from mid morning to near dusk silently and with a fair degree of visual stealth.

I'm sure if someone actually put some thought into a simple system like this as far as programming goes, you could task it to effectively detect and hunt thermals within the box if you can source a micro IVSI and slave that to the logic unit as an error correction and averaging function to the altimeter. With that you'd be able to tell exactly when you gain or lose lift via the logic unit and sense pockets of lift. A waypoint could be sampled at the center of tyhe column and the aircraft would be programmed to spiral back into the waypoint for as long as the IVSI detects a posotive rate of climb.

It'd work anywhere you've got good thermals.

You could also look into building a rocket you can add a ram air chute to, then use 1 rc channel to steer it back in for a landing. Launch angled upwind and just make corrections as it drifts back to you.

Originally posted by earth2
Wouldnt a helium balloon be easier or hot air balloon. Then it would be a little easier to retreive. Just pull the string. Which gives me another idea maybe a kite.

You are right a helium balloon and or kite would be easier. big problems with it thow. A balloon is way more visible making it easier to trace back to you. The goal is not to be seen while your seeing them.

Originally posted by citizen smith
AA, the only major downside I can see to your plan is that the rocket-plume is going to be visible to anyone within range of your camera lens so giving yourself away as someone who has shiny toys worth stealing.

These rockets are very small and the Rocket-plume or contrail is pretty much invisible espically on a bright sunny day. the sounds they make can only be heard a short distance off so practically no noise to give away position. My latest rocket is Estes Rocket Bullpup12D Not the one I shoot the camera off with but a real fast one This thing moves quick with the bigger motors in, and it gives everybody else a idea what in the world ime talking about

However, I was watching an episode of 'Mythbusters' earlier today and their experimentation with water+compressed air pop-bottle rockets....could they be used as a stealth-alternative?

Isnt Mythbuster great? I did the h20 rockets as a kid. lots of fun espically on a hot day but with hand pumps you couldn't get the altitude or the drift time to snap good pictures. nor is there a camera ready to snap on to a soda bottle.

With the Estes Rockets you put on a slightly over sized parachute witch can be made from clear plastic and it can drift for up to a couple of minutes before it hits the ground. The launcher is easy to DIY from scrap parts laying around any garage or work shop. As for the motors there very cheap so you can buy a lot of them at one time. Ive never done it but ive read articles on making your own motors. Its not a perfect solution but its a good compromise.

[edit on 20-5-2007 by angryamerican]

I'd say a remote control aircraft myself, rather than a rocket, as it is a lot easier to retrieve, particularly if you have a camera on it like in that video posted earlier. I'd need a bit of practice at first, but it can't be too difficult. You could probably even improvise one, it's just the servos and control that could be a problem. Though a wire guided system could eliminate a lot of problems, though it may create some problems as well. I would expect it to be relatively easy to use.

I reckon a combination of the two would be even better.

I'm sure it would be fairly easy and not require too much in the way of aeromodelling skills to build a wide-body rocket with flip-out wings actuated by either a piezo g-force chip (already used in model rocketry for parachute ejection) or solid-state attitude gyro chip (again, used in model rocketry) to trigger the wing-out.

At that point, the rocket becomes a glider and could give enough loiter time at a decent altitude to get some decent images

If you have standard type rocket tail-fins then you could hook up each opposing pair as aelirons and rudder to a lightweight 2-channel micro-servo for rudimentary flight control.

Keep stored in a capped tube that you can open the top and launch vertically and you have a mini-recon-stinger rocket...would look amazing to launch from the shoulder too! (though the missing singed eyebrows wouldn't)

Edit to add:

Of course, you could just go the who hog and build something totally excessive and damn good fun to scare the neighbours with...a DIY cruise missile

[edit on 24-5-2007 by citizen smith]

Originally posted by citizen smith
I reckon a combination of the two would be even better.

I'm sure it would be fairly easy and not require too much in the way of aeromodelling skills to build a wide-body rocket with flip-out wings actuated by either a piezo g-force chip (already used in model rocketry for parachute ejection) or solid-state attitude gyro chip (again, used in model rocketry) to trigger the wing-out.

At that point, the rocket becomes a glider and could give enough loiter time at a decent altitude to get some decent images

Already done the link is the beginners model they do have a design that the wings do fold flat against the rocket until its its past apex then they turn out on a center pivot and glides down.
model rocket glider

If you have standard type rocket tail-fins then you could hook up each opposing pair as aelirons and rudder to a lightweight 2-channel micro-servo for rudimentary flight control.

That would take a G motor to get any kind of altitude once you start putting on things like servos. G motors can not be had without a license.

Keep stored in a capped tube that you can open the top and launch vertically and you have a mini-recon-stinger rocket...would look amazing to launch from the shoulder too! (though the missing singed eyebrows wouldn't)

Edit to add:

Of course, you could just go the who hog and build something totally excessive and damn good fun to scare the neighbours with...a DIY cruise missile

[edit on 24-5-2007 by citizen smith]

Now were talking. my neighbors already think ime a cook. that would be the last stew for them ime sure

citizen smith take a look at the link Its closer to what you have in mind but you can see it would be a nightmare to add servos.
scissor wing rocket:

Originally posted by angryamerican
That would take a G motor to get any kind of altitude once you start putting on things like servos. G motors can not be had without a license.

You're referring to solid-fuel motors which one they reach a certain size, are classified as explosive devices and as you point out, require licences to buy, own, or operate. But there is a form of propulsion that side-steps that particular piece of legislation; Nitrous-Oxide hybrid engines.

These engines rely on the oxidisation process of polythene or similar fuel-grain source by the NOx to provide the thrust...and the greatest danger that could be posed is fits of the giggles from a leaking NOx oxidiser line

"..Hybrid rocket motors are not subject to the same laws, since they do not contain pre-mixed fuel and oxidiser, nor do they require fuel and oxidiser to be mixed until they are launched, nor are the fuel and oxidiser dangerous.."

The only laws you could possibly violate are ones requiring Air Traffic Control notification as some of these contraptions have ceilings in the 000's of feet
More on hybrid rocketry here




[edit on 24-5-2007 by citizen smith]

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