Comp Air 7 - Walter Turboprop Performance

Comp Air 7 - Walter Turboprop Performance

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INDICATED CRUISE AIRSPEED
On a typical demonstration flight at 10,000 feet, with 3 to 5 people on board and full fuel, prospective Comp Air 7 Turbine builders will observe cruise speeds of about 220 mph indicated airspeed (IAS) at 100 lbs. torque, or about 205 to 210 mph at a typical economy cruise power setting of 80 lbs. torque. At this power setting (about 95% N₁), fuel burn will be about 37 to 40 gph. Vne is 257 mph IAS.

turbo7a.jpg (21536 bytes) TRUE AIRSPEED
As most pilots are aware, airspeed indicators are usually calibrated for sea level, std. atmosphere conditions. In thinner air at higher altitudes, an airplane can travel faster with less drag and lower fuel burn than at lower altitudes. In the thinner air, however, a significant discrepancy exists between indicated airspeed and the speed you are actually flying (true airspeed). Comp Air 7 Turbine pilots report True Airspeeds (how fast they are actually going, easily verified by GPS in no-wind conditions) of about 250 mph TAS during economy cruise flight at 16,000' to 18,000'. Top speed is about 275 mph TAS @ 21,000' (max. power). For those who prefer to think in KNOTS, expect about 210 to 225 KTAS, depending on altitude/power.

CLIMB PERFORMANCE
Climb performance: climb rates of about 5000 feet per minute are possible with a Comp Air 7 Turbine (keep weight down during construction!). That's a VERY steep climb angle, however, and if it is sustained your passengers will likely complain. A more comfortable "cruise climb" of about 2000 fpm is easily sustainable all the way to cruising altitude, at 150 mph IAS.

APPROACH SPEED
Recommended final approach speed is 80 to 90 mph IAS (best glide speed is 90 mph).

POWER OFF STALL SPEED
Very gentle -- occurs at about 60 mph IAS. Typical reaction to stall is: "...that's it??"!

Comp Air 7 Turbine
- Introduction
- Features & Benefits
- Performance & Specifications
- Builders & Pilots
- Flight Reviews
- Walter Engine Package
- Prices & Options

Built with Pride in the USA. God Bless America.

900 Airport Road. -- Merritt Island, FL 32952 USA .
Phone: (321) 452-7168, (321) 453-6641 -- Fax (321) 452-1880 -- Web: www.compairinc.com
Email: info@compairinc.com