10m home range project.

[angrybear]

How are you going to support the duct or will you only shoot prone, with the duct on the ground ?

[MrChipShoulder]

The duct will be on 4x4 posts concreated into the ground, two at the end and single triangulated legs on the way down. The target centre will be NSRA 55".

I made the alloy drive bosses today for the motor shaft and cast the resin around them. I then turned the resin into pulleys. I also turned up and bolted on the drive pulleys onto the main cord pulleys. A pulley set and motor were set-up over 8 foot and tested. It was OK, but I'd like it faster (can't stand waiting for whizzers!) So I've now got two more resin blocks casting and bearings ordered so I can make a pair of step-up pulleys. These will basically double the speed of the cord pulleys. If it's a bit fast on the test bed, I can turn down the large motor pulley, that'll reduce the controll box size and slow the speed, win win

Maybe I can run a thread over in the gallery section here so I can post pics as I go?
Am I allowed to do that?
Or how can I post pics in this thread?

The ferets will be moved over tomorrow and the plastic shed will be going up.

[crowbar]

With all this lagging and reflexion problems perhaps something like those grey plastic chutes they use for dropping
rubbish down into skips might be better .

[MrChipShoulder]

With all this lagging and reflexion problems perhaps something like those grey plastic chutes they use for dropping
rubbish down into skips might be better .

OK, I'll buy some of those instead. Thanks for the tip.

[angrybear]

You post images either by putting them on a host site like "imgbb" & copy/paste a link code, which I prefer to do to keep the actual post smaller.
or host the picture direct in to your post using the "insert image" link in the middle row above the dialogue box 4th from right.

[MrChipShoulder]

You post images either by putting them on a host site like "imgbb" & copy/paste a link code, which I prefer to do to keep the actual post smaller.
or host the picture direct in to your post using the "insert image" link in the middle row above the dialogue box 4th from right.

Thank you Angrybear, I couldn't find the pics link in this BBS thread so I went for your image host option. I have got a Photobucket account, but it's 'off the chart' hopless and slow!!

Here are some pics so far of stuff to show.

https://ibb.co/kLEsH9
https://ibb.co/kYMuVU
https://ibb.co/fVB6c9
https://ibb.co/bKdV4p

The grey and alloy pulley parts are home made and home cast then turned. The pic shows one set running off the Vauxhall windscreen motor gearbox. The gearbox is very slow, but after playing with different size pulleys, I got the cord speed pretty good and quick The alloy boss was turned up and a 10.5 degree taper hole made so the output shaft taper splines can engage.

The extra pulley bolted to the bottom of the proprietary Crapbay pulley was turned up from some nylon stock I had. There was a lip in the proprietary Crapbay pulley, so I used that as a register for locating my nylon extra pulley. The resin double pulley is yet to have a pair of double bearings added (they are on their way) I just drilled a 10mm hole for now so can test the speed. The picture also shows some swarf in the 'U', that is just some muck off the bench, the 'U' IS perfectly smooth

Now I've got the speed right I was able to order the drive belts. They are 175mm diameter and 5.5mm round cross section. Hoping they will get here tomorrow so I can make the whizzer boxes and get all the 'guts' in one working place

[MrChipShoulder]

Quick update on the whizzers.

Starting to stich all the bought and made parts together now

https://ibb.co/ceYj6e

Total cost of what you see here is £36! Basically just the motors, the rest is made from stock I already had.