Diamond Twin Star vs Gulfstream American GA7

Side-by-side specs, range, and real operating costs for up to 5 aircraft.

Aircraft

Search for an aircraft above to begin your comparison.

Mission Performance

Tap to isolate

Values normalised across compared aircraft. Fuel Economy is inverted (lower burn = higher score). See table below for raw figures.

Mission Performance Details

Metric Diamond Twin Star Diamond Aircraft Industries Gulfstream American GA7 Gulfstream Aerospace Corporation
Stall Speed 67 kts 71 kts
Approach Speed 85 kts 85 kts
Cruise Speed 175 kts 160 kts
Range 1,215 nm 1,170 nm
Service Ceiling 18,000 ft 17,400 ft
Rate of Climb 1,550 fpm 1,150 fpm
Fuel Burn 10.4 gph 16.0 gph

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.

Fuel Burn & Range

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

Diamond Twin Star Jet A
10.4 gph
baseline
1,215 nm range 76 gal usable 7h 18m endurance 16.8 nm/gal $62 fuel/hr
Diamond Twin Star: 10.4 gallons per hour at cruise, 1,215 nautical mile published range, 7 hour 18 minute endurance, 16.8 nautical miles per gallon.
Gulfstream American GA7 Avgas
16.0 gph
+5.6 gph
1,170 nm range 118 gal usable 7h 22m endurance 10.0 nm/gal $104 fuel/hr
Gulfstream American GA7: 16.0 gallons per hour at cruise, 1,170 nautical mile published range, 7 hour 22 minute endurance, 10.0 nautical miles per gallon.
Avgas range 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:
Diamond Twin StarJet A
$135 /hr
Diamond Twin Star: $135 per flight hour — fuel $62, maintenance and reserve $73.
Gulfstream American GA7Avgas
$104 /hr
Fuel-only floor (maintenance & reserve withheld)
Diamond Twin Star Piston
$22,088 /yr
Diamond Twin Star: $22,088 per year — insurance $11,000, hangar $8,088, annual inspection $3,000.
Gulfstream American GA7 Piston
$10,350 /yr
Gulfstream American GA7: $10,350 per year — insurance withheld, hangar $7,340, annual inspection $3,010.

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.

190 + 30 lb Occupants
×
1
Diamond Twin Star
4 / 4 seats 76 / 76 gal fuel 790 lb wet payload 1,299 lb useful 4,407 lb MTOW
Gulfstream American GA7
4 / 4 seats 118 / 118 gal fuel 504 lb wet payload 1,212 lb useful 3,800 lb MTOW

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

Dimensions & configuration

Representative planforms, drawn to shared scale.

Diamond Twin Star
44.3 × 28.1 ft 8.2 ft tall
2× Piston Retractable Unpressurized
Gulfstream American GA7
36.8 × 29.8 ft 10.3 ft tall
2× Piston Retractable Unpressurized

Payload-Range Map

Full fuel ← → Max payload

Origin: · two fingers to move map

Cookies and analytics. We use Mixpanel and Google Analytics to understand how this site is used. Mixpanel records session replays (interaction patterns, scroll, and click timing). Page content is masked: we do not see what you read or type. Cookies are set only if you accept. Read our privacy policy.