Narrative:

After taking off from runway 23 on an IFR flight I was cleared to climb on runway heading to 2;000 MSL. While climbing through 750 MSL TCAS called traffic dead ahead about the same time as we spotted a high wing cessna right ahead. We broke right and narrowly avoided him. We had had no warning from tower about potential conflict. The controller was very busy with many aircraft in training situations entering and exiting [his airspace]. In talking to the tower supervisor later it appears the cessna was on a practice approach and drifted across the end of the runway. I don't think the tower controller should have allowed practice approaches (to another runway!) during such a busy time. He should have appreciated that they could drift into a conflict and should have warned me of the potential.one additional factor is that the lancair evolution is a very high performance airplane and the controller may have been unfamiliar and not realized how fast we would go once released.

Google
 

Original NASA ASRS Text

Title: A Lancair pilot departing on a IFR flight plan experienced an NMAC with a Cessna single flying a practice approach to a different runway.

Narrative: After taking off from Runway 23 on an IFR flight I was cleared to climb on runway heading to 2;000 MSL. While climbing through 750 MSL TCAS called traffic dead ahead about the same time as we spotted a high wing Cessna right ahead. We broke right and narrowly avoided him. We had had no warning from tower about potential conflict. The Controller was very busy with many aircraft in training situations entering and exiting [his airspace]. In talking to the Tower supervisor later it appears the Cessna was on a practice approach and drifted across the end of the runway. I don't think the Tower controller should have allowed practice approaches (to another runway!) during such a busy time. He should have appreciated that they could drift into a conflict and should have warned me of the potential.One additional factor is that the Lancair Evolution is a very high performance airplane and the Controller may have been unfamiliar and not realized how fast we would go once released.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.