OK I am tight but I like car heater motors for tugs. They are large, turn big props that produce lots of thrust & last forever. They are also cheap. In the past I have used the black Smiths car heater motors (£6 each new) & Ford Cortina heater motors (£2 from my local scrapyard) which were smaller & less powerful. The problem is that there are now very very few Cortinas about & my stock of the Smiths motors has dried up. I know that MMM do some nice motors but they are rather expensive.
So, the question. I am looking for a powerful heater or radiator cooling fan heater, that is not very large diameter - 50mm to 70mm - but which will efficiently turn a 3.5" prop to produce lots of tug thrust on a low current. It should also be from a car that is easily found in UK scrap yards - & preferably will be for some time to come. One of the advantages of the Cortina was the accessability of the fan motor under the bonnet in plain view & removable with three simple screws whilst some are buried/ hidden under the dashboard somewhere. Ease of removal from the donor car matters.
I have seen suggestions about seat & window winder motors but the window winders that I have seen are not very large & I haven't seen a seat motor to comment.
Suggestions please.