LoPresti has several very effective yet simple speed mods for your airplane. SPEED SPATS reduce the drag caused by the retracted but somewhat exposed main gear wheels and tires. LoPresti Speed Spats are worth 4 MPH in cruise speed at 75% power.
SpeedSpats For Piper
LoPresti Speed Spat Product and Performance Report
May 30, 2009
Before getting into the report, let me say that I am not affiliated with LoPresti. My comments and findings are based on the installation of a set of LoPresti SpeedMerchants SpeedSpats (main landing gear fairings) on my personal aircraft, a 1974 Arrow-II. There is nothing special about this Arrow. For those who want to compare performance figures to their own Arrow, mine has a high-time engine and it has a 3-blade Hartzell propeller.
Why LoPresti Speed Spats? The answer arrived from a number of reasons that fit me (but perhaps will not fit others). First, the Arrow fits our family lifestyle the best and I have no interest in purchasing another aircraft with faster inherent speed at this time. That being said, I wanted a little faster cruise performance – and that pointed me in the direction of speed modifications for the Arrow. LoPresti happens to be located at my airport home base of Sebastian, FL (they just relocated from Vero Beach) – which caused me to favor their products versus others on the market. Of all the LoPresti speed mod products for the Arrow-II, the Speed Spats and the new engine cowling promised (according to LoPresti’s literature) the greatest speed gains. And since the cost of the cowling is more than my pocketbook can handle, I focused on the Speed Spats.
The LoPresti Speed Spats come as a kit with four (4) molded fiberglass parts with a white gel-coat type product coating on the outside; and bare fiberglass on the inside. The kit comes with a tube of special adhesive; one pair of Latex gloves; an ample supply of pull-rivets; a 0.125” drill bit; installation instructions; STC information; and set of master drawings.