A Fleet Built for Success

Weather Modification, Inc., has been modifying and operating aircraft for cloud seeding and atmospheric research operations since 1961. We maintain and operate a fleet of more than 35 twin-engine aircraft in various configurations that meet the needs of every client.

Weather Modification, Inc., uses several models of aircraft in our own operations, although we can adapt our equipment to virtually any type of aircraft for specific customer needs. Weather Modification, Inc., has the following aircraft types in service and available at this time:

Beechcraft King Air

C90/A/B/GTi

King Air C90GTi
Length	35 ft 6 in
Height	14 ft 3 in
Wing Span	50 ft 3 in
Horsepower per Engine	550 shp
Maximum Gross Weight	10,485 lbs
Typical Empty Weight	6,950 lbs
Typical Useful Load	3,010 lbs
Typical Useful Load	3,010 lbs
Maximum Fuel Capacity	384 US gal
Maximum Cruise Speed	270 kts
All-Engine Service Ceiling	30,000 ft
Single-Engine Service Ceiling	21,500 ft
Single-Engine Service Ceiling	21,500 ft
All-Engine Rate Of Climb	1,955 ft/min
Single-Engine Rate Of Climb	539 ft/min

King Air C90
Length	35 ft 6 in
Height	14 ft 3 in
Wing Span	50 ft 3 in
Horsepower per Engine	550 shp
Maximum Gross Weight	9,650 lbs
Typical Empty Weight	5,765 lbs
Typical Useful Load	3,010 lbs
Maximum Fuel Capacity	384 US gal
Maximum Cruise Speed	225kts
All-Engine Service Ceiling	30,000 ft
Single-Engine Service Ceiling	15,050 ft
All-Engine Rate Of Climb	1,900 ft/min
Single-Engine Rate Of Climb	525 ft/min

King Air C90A
Length	35 ft 6 in
Height	14 ft 3 in
Wing Span	50 ft 3 in
Horsepower per Engine	550 shp
Maximum Gross Weight	10,100 lbs
Typical Empty Weight	5,765 lbs
Typical Useful Load	3,010 lbs
Maximum Fuel Capacity	384 US gal
Maximum Cruise Speed	240 kts
All-Engine Service Ceiling	30,000 ft
Single-Engine Service Ceiling	15,600 ft
All-Engine Rate Of Climb	2,137 ft/min
Single-Engine Rate Of Climb	626 ft/min

King Air C90B
Length	35 ft 6 in
Height	14 ft 3 in
Wing Span	50 ft 3 in
Horsepower per Engine	550 shp
Horsepower per Engine	550 shp
Maximum Gross Weight	10,100 lbs
Typical Empty Weight	6,702 lbs
Typical Useful Load	3,100 lbs
Typical Useful Load	3,100 lbs
Maximum Fuel Capacity	384 US gal
Maximum Cruise Speed	247 kts
All-Engine Service Ceiling	30,000 ft
Single-Engine Service Ceiling	15,600 ft
All-Engine Rate Of Climb	2,137 ft/min
Single-Engine Rate Of Climb	626 ft/min

B200/B/GT

King Air 200
Length	43 ft 10 in
Height	14 ft 10 in
Wing Span	54 ft 6 in
Horsepower per Engine	850 shp
Maximum Gross Weight	12,500 lbs
Typical Empty Weight	7,315 lbs
Typical Useful Load	4,107 lbs
Maximum Fuel Capacity	544 US gal
Maximum Cruise Speed	289 kts
All-Engine Service Ceiling	35,000 ft
Single-Engine Service Ceiling	21,900 ft
All-Engine Rate Of Climb	2,460 ft/min
Single-Engine Rate Of Climb	740 ft/min

King Air B200
Length	43 ft 10 in
Height	14 ft 10 in
Wing Span	54 ft 6 in
Horsepower per Engine	850 shp
Maximum Gross Weight	12,500 lbs
Typical Empty Weight	8,102 lbs
Typical Useful Load	4,107 lbs
Maximum Fuel Capacity	544 US gal
Maximum Cruise Speed	292 kts
All-Engine Service Ceiling	35,000 ft
Single-Engine Service Ceiling	21,900 ft
All-Engine Rate Of Climb	2,460 ft/min
Single-Engine Rate Of Climb	740 ft/min

King Air B200GT
Length	43 ft 10 in
Height	14 ft 10 in
Wing Span	54 ft 6 in
Horsepower per Engine	850 shp
Maximum Gross Weight	12,500 lbs
Typical Empty Weight	8,520 lbs
Typical Useful Load	3,870 lbs
Maximum Fuel Capacity	544 US gal
Maximum Cruise Speed	308 kts
All-Engine Service Ceiling	35,000 ft
Single-Engine Service Ceiling	24,200 ft
All-Engine Rate Of Climb	2,460 ft/min
Single-Engine Rate Of Climb	740 ft/min

B350

King Air 350
Length	46 ft 8 in
Height	14ft 4 in
Wing Span	57 ft 11 in
Horsepower per Engine	1,050 shp
Maximum Gross Weight	15,000 lbs
Typical Empty Weight	12,500 lbs
Typical Useful Load	5,574 lbs
Maximum Fuel Capacity	539 US gal
Maximum Cruise Speed	312 kts
All-Engine Service Ceiling	35,000 ft
Single-Engine Service Ceiling	21,500
All-Engine Rate Of Climb	2,731 ft/min
Single-Engine Rate Of Climb	780 ft/min

Hawker

Hawker 400XP
Length	48 ft 5 in
Height	13 ft 11 in
Wing Span	43 ft 6 in
Horsepower per Engine	2,965 shp
Maximum Gross Weight	16,300 lbs
Typical Empty Weight	13,000 lbs
Typical Useful Load	5,515 lbs
Typical Useful Load	5,515 lbs
Maximum Fuel Capacity	733 US gal
Maximum Cruise Speed	465 kts
All-Engine Service Ceiling	43,465 ft
Single-Engine Service Ceiling	20,600 ft
All-Engine Rate Of Climb	2,414 ft/min
Single-Engine Rate Of Climb	350 ft/min

Bombardier

Lear Jet 35A
Length	48 ft 8 in
Height	12 ft 2 in
Wing Span	39 ft 6 in
Pounds of Static Thrust per Engine	3,500 lbs
Maximum Gross Weight	18,301 lbs
Typical Empty Weight	9,154lbs
Typical Useful Load	8291 lbs
Maximum Fuel Capacity	931 US gal
Maximum Cruise Speed	430 kts
All-Engine Service Ceiling	41,000 ft
Single-Engine Service Ceiling	25,000 ft
All-Engine Rate Of Climb	4,340 ft/min
Single-Engine Rate Of Climb	1,280 ft/min

Piper

Piper Seneca II

Piper Seneca II
Length	28 ft. 07 in.
Height	9 ft. 11 in.
Wing Span	38 ft. 11 in.
Horsepower per Engine	200 shp
Maximum Gross Weight	4,570 lbs
Typical Empty Weight	3,200 lbs
Typical Useful Load	1,370 lbs
Maximum Fuel Capacity	93-123 US gal
Maximum Cruise Speed	225 mph
All-Engine Service Ceiling	25,000 ft
Single-Engine Service Ceiling	14,400 ft
All-Engine Rate Of Climb	1,200 ft/min
Single-Engine Rate Of Climb	190 ft/min

Piper Cheyenne II

Piper Cheyenne II
Length	34 ft 8 in
Height	12 ft 9 in
Wing Span	42 ft 8 in
Horsepower per Engine	620 shp
Maximum Gross Weight	9,000 lbs
Typical Empty Weight	5,018 lbs
Typical Useful Load	4,032 lbs
Maximum Fuel Capacity	374 US gal
Maximum Cruise Speed	269 kts
All-Engine Service Ceiling	31,600 ft
Single-Engine Service Ceiling	14,600 ft
All-Engine Rate Of Climb	2,710 ft/min
Single-Engine Rate Of Climb	660 ft/min

Cessna

Cessna 340A
Length	34ft. 04 in.
Height	12 ft. 7 in
Wing Span	38 ft. 1 in.
Horsepower per Engine	310 shp
Maximum Gross Weight	6,290 lbs
Typical Empty Weight	4,500 lbs
Typical Useful Load	1,790 lbs
Maximum Fuel Capacity	183-203 US gal
Maximum Cruise Speed	281 mph
All-Engine Service Ceiling	29,800 ft
Single-Engine Service Ceiling	15,800 ft
All-Engine Rate Of Climb	1,650 ft/min
Single-Engine Rate Of Climb	315 ft/min

Aircraft Modification

If you operate your own aviation fleet, we can provide custom-modified aircraft to match your specific mission requirements - or we can modify your existing aircraft to perform the operations required.

Our talented team of experienced technicians facilitates the entire process - from design to modification to US Federal Aviation Administration (FAA) standards certification. Weather Modification, Inc., can also perform any necessary maintenance required or upgrades requested by the client during the modification process.

Some of the modifications that we currently perform are:

VIP Transport
Photographic Equipment
Remote Sensing
Environmental Monitoring
Telemetry
Atmospheric Chemistry
Cloud Physics Measurements
Air Ambulance
Cloud Seeding

Weather Modification, Inc. has acquired US FAA Supplemental Type Certificate (STC) for select seeding equipment on the following aircraft:

Hawker 400
King Air 350, 200, and C90

The STC ensures that equipment is built and installed to the highest aviation standard for safety and performance.

Aircraft Sales and Leasing

We can provide air and ground staff for a turnkey program
Unparalleled support from our maintenance and flight department assures smooth operation for your project
Support is available 24-hours a day, 7-days a week, around the globe

Let us locate, evaluate, and facilitate the purchase of a suitable aircraft for your needs.