EGS- I truly do not know where the numbers came from. Here is what I do know, some vague descriptions. I will eventually scan all the sales brochures so you can see specs.:
Madill Yarders introduced in the 1960's:
1. Madill 009. 2 drum highlead machine, with strawline. Usually 90' tower height.
2. Madill 046. 3 drum slackline yarder, with straw and taglines, Usually 90' tower height.
3. Madill 052. 3 drums as 046, but running skyline. Huge, heavy. Usually 90' tower also.
4. Madill Yarding Crane, later shrunk and called 044. Swinging grapple yarder. Huge.
Madill Yarders introduced in the 1970's:
1. Madill 076. 45' Tower, mounted on Terex crawler, similar to 071, only 2 built.
2. Madill 071. 50' Tower, slackline yarder mounted on Terex, tank, or rubber Madill SP.
3. Madill 044. Large swing grapple yarder. Smaller, lighter version of the 'Yarding Crane'.
4. Madill 084. Bigger version yet of the 044. Only 3 were built. Just too big and heavy.
Madill Yarders of the 1980's:
1. Madill 121. Swing yarder, lightweight and mobile, only 3 ever built.
2. Madill 122. New and improved 121, very popular and still in use today. 110,000 lbs.
3. Madill 123. Larger, basically bigger version of the 122. Weighs about 150,000 lbs.
4. Madill 144. Bigger still version of the 123. Basically huge, swing grapple yarder.
5. Madill 171. Bigger version of the 071, with 70 tower, bigger drums, etc, in big tank.
In 1989 Pat Madill was killed in a plane crash and Madill was purchased by Cypress Ltd, of Delta BC. The madills of the 90's were a mixed product, closer to the Cypress machine.
Also, some Cypress machines (6280, 7280) were painted orange and called madills.
Madill yarders of the 1990's:
1. Madill 120, Swing Yarder. Grapple or dropline machine, all hydraulic, 105,000 lbs.
2. Madill 124, Swing Yarder. Same as above, much much larger, all hydraulic.
3. Madill 172. 70' slackline machine, hydraulically controlled mobile standing tower.
In the late 90's the Cypress/Madill joint venture purchased Thunderbird from Ross Murray, and some of those machines were painted orange and re-assigned numbers.
Its all convoluted now, but that is basically the Madill lineup. Log loaders, boom boats, and other things were built and very poular, like the 075 line loader discussed earlier.