They were commonly mounted high up behind the front doors and swung out horizontally. Rear brakes were mounted inboard, following contemporary racing practice. The sponsons were mounted horizontally on the prototype. Later they were mounted on wooden panels. In this case, the filter need not be mounted vertically. These are typically be mounted in tandem on the drive axle. The tubes then were mounted in parallel arrays. Solid tires were then mounted on the rig. A ladder can also be mounted behind the cab. The engine was mounted transversely and produced . Gatling guns were even mounted aboard ships. Slosh baffles are also mounted on this bulkhead. It is mounted coaxially with an optic rangefinder. Even with FWD, the engine is also mounted longitudinally. Small transportable designs may be permanently mounted on trailers, and can be moved intact.