IAI 1124 Westwind vs Learjet 70

Side-by-side specs, range, and operating costs.

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Dimensions & configuration

Representative planforms, drawn to shared scale.

IAI 1124 Westwind
44.8 × 52.3 ft 15.8 ft tall
2× Turbofan Retractable Pressurized
Learjet 70
50.9 × 55.6 ft 14.1 ft tall
2× Turbofan Retractable Pressurized

Flight Profile

Service ceiling, range, and climb rate.

Tap legend to isolate

Arc represents the climb-cruise-descent profile based on published service ceiling and range. Climb rate annotated on ascent. FL180 (18,000 ft) shown for reference.

Mission Performance

Stall, approach, cruise, range, ceiling and climb: best values are at the top.

Mission performance specifications
Specification IAI 1124 WestwindLearjet 70
Stall speed 99 kt97 kt
Approach speed 120 kt126 kt
Cruise speed 440 kt465 kt
Range 2200 nm2060 nm
Service ceiling 45000 ft51000 ft
Rate of climb 3200 fpm4150 fpm
Fuel burn 242.0 gph199.0 gph

Each axis is scaled independently across the compared aircraft and printed in its own units; every vertex sits at the published figure. Higher is better on all axes: Stall, Approach and Fuel Burn are inverted (lower = higher). A missing figure breaks the line at that axis.

Fuel Burn & Range

Range, endurance, and what the fuel costs by the hour.

IAI 1124 Westwind Jet A
242.0 gph
Baseline
2,200 nm range 1.8 nm/gal 1300 gal usable $1,452 fuel/hr 5h 22m endurance
IAI 1124 Westwind: 242.0 gallons per hour at cruise, 2,200 nautical mile published range, 5 hour 22 minute endurance, 1.8 nautical miles per gallon.
Learjet 70 Jet A
199.0 gph
Baseline
2,060 nm range 2.3 nm/gal 905 gal usable $1,194 fuel/hr 4h 32m endurance
Learjet 70: 199.0 gallons per hour at cruise, 2,060 nautical mile published range, 4 hour 32 minute endurance, 2.3 nautical miles per gallon.
Jet A range each cell = 1 hr of cruise · width scales with speed

Bars show published still-air range. Endurance is usable fuel divided by the published cruise burn. Estimates only. Always verify against the POH.

Runway Performance

Density altitude adjusted estimates

Outside Air Temp
0°F57°F115°F
Field Elevation
SL4,0008,000 ft
Density Altitude

Takeoff over 50 ft obstacle

Landing ground roll

Base distance DA penalty
Scale: 6,000 ft

FAA 10%/1,000 ft DA rule of thumb (FAA-H-8083-25B). Turboprops and jets are less sensitive in practice. Always verify against the POH.

Estimated Operating Costs

Scale:
IAI 1124 Westwind Jet A
$3,134 /hr
Baseline
IAI 1124 Westwind: $3,134 per flight hour — fuel $1,452, maintenance and reserve $1,682.
Learjet 70 Jet A
$3,154 /hr
Baseline
Learjet 70: $3,154 per flight hour — fuel $1,194, maintenance and reserve $1,960.
IAI 1124 Westwind Turbofan
$0 /yr Baseline
No fixed-cost estimate available
Learjet 70 Turbofan
$95,843 /yr Baseline
Learjet 70: $95,843 per year — insurance $44,743, hangar $48,600, annual inspection $2,500.

Estimates only. Costs vary by location, pilot profile, and market conditions. See individual aircraft pages for source notes.

Capability & limits

Each bar stacks your selected occupants against full fuel and the aircraft's useful-load limit (the black line). The open gap between them is spare payload. Add an occupant and the gap closes; once it's gone, fuel has to give.

lb

+ lb / pax

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IAI 1124 Westwind
9 / 9 seats 1,300 / 1,300 gal fuel 1,140 lb wet payload 9,850 lb useful 22,850 lb MTOW
Learjet 70
9 / 9 seats 905 / 905 gal fuel 1,546 lb wet payload 7,610 lb useful 21,500 lb MTOW

Occupants at 190 + 30 lb each. Fuel at 6.7 lb/gal jet-A, 6.0 lb/gal avgas.

Payload-Range Map

Origin: · two fingers to move map

lb

+ lb / pax

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1

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