Re: Help!! Coach Will Not Stay in Travel Mode
Reply #25 –
You do it with a pair of "winding sticks" which are simply two straight boards, supported on each end by a block, or similar. You place them a measured distance apart, in this case the blocks should be located where the coach front and rear wheels are located when parked. The simply place the boards on edge on blocks,making sure boards are equal distance apart on each end., step back, squat or hunker down and carefully sight over the top of the closest board, and note how it lines up with top of the distant board edge. Any difference will be easily apparent. If edges appear to be exactly parallel, it's flat.
The boards need to be straight, a couple of straight 2x4 at least eight feet long (10 feet would be better}. The blocks need to be exactly the same height, such as 4 concrete blocks, paint cans, buckets, etc. The two pairs of supports are located where wheels bear on pavement when coach is parked.
I've used the technique many times....for checking flatness of a workbench top, to ensure a boat under construction is supported properly in a plane, and to check and see what the flatness of pretty much anything is. Googling "winding sticks" will show you many examples, most of them dealing with woodwork but the technique scales up for larger sizes. I think of it as a primitive but accurate optical comparator.....
Topic: Help!! Coach Will Not Stay in Travel Mode