Lancair pilot reports a near midair collision with a bonanza while flying the sound visual to runway...

Narrative:

On an IFR approach in VMC conditions; I was being vectored to the sound visual runway 34 at hpn. I had been told that I was #4 for approach. A bonanza was also approaching VFR along the shoreline from the east. I had not been warned of any traffic or impending conflict by ny approach. All of a sudden the approach controller told the bonanza to stop its descent; and instructed me to descend from 3000 to 2000 and turn right to 270 from my 180 heading. Even then I was not given any indication of a possible mid-air. I immediately started my turn and descent and saw the bonanza pass right in front of me at perhaps 100-200 distance. Once settled at the new heading and altitude; I told the controller that I had come very close to the bonanza. He replied that if I had descended faster; it would not have been a problem. The frequency was very busy; as was I preparing to land at hpn; so I did not comment on his lack of any conflict warning. I believe that the controller was overloaded; and failed to give proper warning of an impending conflict. I also believe that he improperly allowed a VFR aircraft into class B airspace in a fashion that conflicted with IFR aircraft setting up for a published approach. I fly regularly into hpn. This sunny sunday was the busiest by twice that I have seen.

Original NASA ASRS Text

Title: Lancair pilot reports a NMAC with a Bonanza while flying the sound Visual to RWY 34 at HPN at 3000 feet. ATC issued instructions to the two aircraft to avoid a collision but they came too late to have much effect. The Lancair pilot; on an IFR flight plan had accepted the Sound Visual and the Bonanza pilot was VFR. See and avoid.

Narrative: On an IFR approach in VMC conditions; I was being vectored to the Sound Visual RWY 34 at HPN. I had been told that I was #4 for approach. A Bonanza was also approaching VFR along the shoreline from the East. I had not been warned of any traffic or impending conflict by NY Approach. All of a sudden the approach controller told the Bonanza to stop its descent; and instructed me to descend from 3000 to 2000 and turn right to 270 from my 180 heading. Even then I was not given any indication of a possible mid-air. I immediately started my turn and descent and saw the Bonanza pass right in front of me at perhaps 100-200 distance. Once settled at the new heading and altitude; I told the controller that I had come very close to the Bonanza. He replied that if I had descended faster; it would not have been a problem. The frequency was very busy; as was I preparing to land at HPN; so I did not comment on his lack of any conflict warning. I believe that the controller was overloaded; and failed to give proper warning of an impending conflict. I also believe that he improperly allowed a VFR aircraft into Class B airspace in a fashion that conflicted with IFR aircraft setting up for a published approach. I fly regularly into HPN. This sunny Sunday was the busiest by twice that I have seen.

Data retrieved from NASA's ASRS site 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.

Attributes
ACN	1206637
Time
Date	201409
Local Time Of Day	1201-1800
Place
Locale Reference	HPN.Airport
State Reference	NY
Aircraft 1
Make Model Name	Lancair Evolution
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Beechcraft Single Piston Undifferentiated or Other Model
Flight Phase	Descent
Route In Use	Other Unknown
Flight Plan	VFR
Person 1
Function	Pilot Flying Captain Single Pilot
Qualification	Flight Crew Commercial Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 6000 Flight Crew Type 550
Events
Anomaly	ATC Issue All Types Conflict NMAC
Miss Distance	Horizontal 150 Vertical 0