I don't know if any of you oldies will remember, but the brake manufacturers tried to engineer a braking system for caravans that you could automatically reverse without getting out of the car and putting a U shaped piece of steel behind the hitch to prevent it going into the A frame and operating the brakes.
Well.
This was fine but it meant that if you applied the handbrake facing down hill it held, but if the van was facing up hill with the brake correctly applied then it was easy to push the van backwards and sometimes it ran backwards by itself.
This was a big problem at the time and various caravan magazines carried horrendous stories of runaway vans... Including mine. I remember it very well and still have cold sweats thinking about it.
Thankfully we've moved on since then
Well.
This was fine but it meant that if you applied the handbrake facing down hill it held, but if the van was facing up hill with the brake correctly applied then it was easy to push the van backwards and sometimes it ran backwards by itself.
This was a big problem at the time and various caravan magazines carried horrendous stories of runaway vans... Including mine. I remember it very well and still have cold sweats thinking about it.
Thankfully we've moved on since then