SpudFiles

I'll do some research next week (if you haven't been counting down, I finish on Monday and my 3 and a half month holiday begins) and see what I can do

Brilliant perhaps dewey can weigh in on this one?

jackssmirkingrevenge wrote:Brilliant perhaps dewey can weigh in on this one?

What do want me to weigh?

Let me do some research on the Receiver and Transmitter modules.
There needs to be encoding/decoding circuits as well.
Note that they are on the same frequency as the RC remote firing system.

I think a fiberglass or plastic tube would be ideal for the body so it does not reduce the transmitter range due to excess metal shielding.

JSR; see if you can locate fluorescent tube plastic containers. They maybe cheaper than fiberglass and possibly strong enough.

The nose cone would be the only metallic piece.

MrC; What is the exact bore dimension in that new barrel?

dewey-1 wrote:What do want me to weigh?

The sanity of leaving MrC to his own devices

I think a fiberglass or plastic tube would be ideal for the body so it does not reduce the transmitter range due to excess metal shielding.

My thoughts exactly

JSR; see if you can locate fluorescent tube plastic containers. They maybe cheaper than fiberglass and possibly strong enough.

I was thinking PVC tube would be up to the job...

PVC is to heavy and has thick walls.
You need a thinner walled plastic tube. Even ABS thin wall would be better.
I will do some searching.

dewey-1 wrote:PVC is to heavy and has thick walls.
You need a thinner walled plastic tube. Even ABS thin wall would be better.

Sectional density good plus it can't be too weak or it will fold on firing.

Stupid question, can a metal body be used as an aerial of sorts?

jackssmirkingrevenge wrote:

dewey-1 wrote:PVC is to heavy and has thick walls.
You need a thinner walled plastic tube. Even ABS thin wall would be better.

Sectional density good plus it can't be too weak or it will fold on firing.

Stupid question, can a metal body be used as an aerial of sorts?

The sectional density would be in the nose cone.

Yes a metal body could be used if it is made for the antenna requirements.
I won't go into details yet until I complete more research on the transmitter antenna requirements.

dewey-1 wrote:MrC; What is the exact bore dimension in that new barrel?

47.8mm

As for the antenna, one could be made in to the fin section by running a wire along the thickness of each fin or the tail could be hollowed out and one of these spring like antennas used:


That's just off the top of my head, I'm sure when I've done some proper research better ideas will come to light.

MrCrowley wrote:47.8mm

Close.

MrCrowley wrote:As for the antenna, one could be made in to the fin section by running a wire along the thickness of each fin or the tail

Brilliant idea

OOH OOH!

jackssmirkingrevenge wrote:

MrCrowley wrote:47.8mm

Close

I guess 47mm/1.88" would be close enough, bit of tape or even grease could make it a better fit.

MrCrowley wrote:I guess 47mm/1.88" would be close enough, bit of tape or even grease could make it a better fit.

Shouldn't be a problem, pusher plate doesn't have to pass over the cross slide during manufacture, and the fins will be made separately.

Sorry guys... Why you want apply this inside the projectile? What would it do on?

It is a crude tracker system.
A method using a directional receiver to locate the projectile.

Here is a complete updated schematic for you MrC.

Thanks, I'll update it to the video, main page of this thread and instructable.

Edit: love the names you gave the components. Wish I had one of those printing label things so I could put "auto arm", "manual arm" and "master arm" on the project box