Having a takeoff issue with my RV7 (not A) and wondering if anyone else has encountered this problem. First let me say,I have have several hundred hours flying this plane with 100?s of takeoffs without any issues. I have had this problem occur on about 12-15 takeoffs over 4 years and not sure if it is a mechanical issue or just something I may be doing wrong. It has mainly occurred on a grass field (sometimes wet), but has occurred a couple times on pavement. My normal takeoff is to slowly add power, push stick forward to get tail up then plane basically flies off ground with a slight back pressure. Issue I am having is that the plane appears to stick to the ground and slight back pressure will not break ground. I keep applying back pressure and the plane will eventually ?leap? into the air with nose high attitude. It did it for 2 takeoffs in a row on wet grass the other day. Things I did to possibly correct , but didn?t help: I checked my elevator trim, made sure I wasn?t pressing brakes : tried not raising the tail so high, none of these helped/solved it. Went today and made several takeoffs from another field, no issues. Anyone else had this happen and found or discovered the issue?