Forum Discussion
professor95
Aug 05, 2010Explorer
There are some "issues" pertaining to running a genny on the rear bumper with the vehicle in motion. A lot will depend on your vehicle speed and the aerodynamic design of your vehicle.
As we know, an extreme low pressure air pocket "can" exist at the rear of a trailer. This pocket can upset air flow to cool a generator.
On my old and now long gone 2005 Prowler I once had to run the rear mounted genny to sustain lighting on my Toad when the alternator went out and the batteries died. When I arrived at my camping destination, the genny was noticeably much hotter than running stationary.
About the only advice I can give is to try it for short runs and measure the results with either your nose or a thermometer (preferably the latter). We lack documented testing in these conditions and it looks like data is needed.
I do know the speed of the vehicle and air flow patterns will be the major variable in cooling or not. It may do fine at 45 mph but overheat at 65 mph. The height and distance of the mount for the genny from the trailer will also cause variations.
Dr. Austin is an aerodynamic type of guy with his experience in his larger flying toys. He is in a prime position to provide info to the thread with his knowledge and rear mounted genny. Hopefully, John will give some test results. ........ John?..........
As we know, an extreme low pressure air pocket "can" exist at the rear of a trailer. This pocket can upset air flow to cool a generator.
On my old and now long gone 2005 Prowler I once had to run the rear mounted genny to sustain lighting on my Toad when the alternator went out and the batteries died. When I arrived at my camping destination, the genny was noticeably much hotter than running stationary.
About the only advice I can give is to try it for short runs and measure the results with either your nose or a thermometer (preferably the latter). We lack documented testing in these conditions and it looks like data is needed.
I do know the speed of the vehicle and air flow patterns will be the major variable in cooling or not. It may do fine at 45 mph but overheat at 65 mph. The height and distance of the mount for the genny from the trailer will also cause variations.
Dr. Austin is an aerodynamic type of guy with his experience in his larger flying toys. He is in a prime position to provide info to the thread with his knowledge and rear mounted genny. Hopefully, John will give some test results. ........ John?..........
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