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PERFORMANCE CHECK-LIST


If moving your aircraft has become difficult and will weigh in on your decision to take a flight, it is probably time to consider purchasing an aircraft tug. There are several factors to consider in your decision making to help ensure you purchase the proper tug with the right power source. As pilots, we can all agree that you can never have too much power when you really need it.

Minimax Aircraft Tugs are highly engineered and designed to be affordable, light-weight, portable, and capable of towing aircraft to 4,000 lbs. gross weight. With this said, there are some considerations which should be understood before purchasing. Namely, what is the slope into your hangar and what type door track or curb do you have to cross to hangar your plane.

Slope is calculated as a percentage of rise and run with 45˚ being 100%. (i.e. 3” rise in 10’ run = 2.5%)



To understand slope (gradient) consider for every 1% gradient the energy required to move an object up-slope will increase by 15%. This means at 1% gradient your plane is now 15% harder to roll. At maximum 2.5% gradient it is 37.5% harder to roll. Our tugs will move your plane and negotiate a maximum 2.5% gradient. Any gradient over this is enough for your plane to roll under its own weight. 6% gradient is the generally accepted maximum allowed in mountainous road construction.

Door tracks or thresholds are typically the most problematic area of moving ones aircraft, but are relatively simple to overcome. If you have a 1” high curb or door track, an 8 inch wide ramp 40 inches long x 1 inch high tapered to 1/8 inch will create a gradient of 2.5%. For every 1/4 inch of obstacle height the ramp must be at least 10 inches long. We have found that most Cabinet Shops will come to your hangar to measure and estimate making the ramps (2-pcs. hardwood 8” wide tapered from required height) for each aircraft main wheel. The aircraft nose wheel typically does not require a ramp.

LOW AIRCRAFT TIRE PRESSURE IS THE NUMBER ONE REASON FOR POOR TOWING PERFORMANCE!

In our experience this condition can make moving your aircraft extremely difficult! For safety's sake and easy towing, it’s good practice to often check tire air pressure.