.... We installed a set on a customers RV-9A and did a bit of testing to see the changes
if any we could detect. The stall speed went down a couple of miles an hour at the very
most. This particular aircraft model has such a low stall speed, the gains if any were
almost undetectable. Its top speed dropped three miles per hour, and the customer said
that was unacceptable for him, as he had gone to great lengths, and considerable expense,
to up the efficiency and speed of his airplane. He also said when cleaning and washing his
aircraft, it was akin to bathing a mad porcupine. He came back and ask us to de-horn
his plane, and return it to its prior condition. This process caused a bit of paint damage
that he, needless to say wasn't very happy about.
