Speed range is 42 - 137 mph which is wide for this type of aircraft
137mph 220kph
Top Speed
The 100hp reaches Vne at only 5400RPM (cruise pitch) demonstrating the efficiency of the low-drag airframe
127mph 205kph
137mph 220 kph
Cruise Speed
Cruise speed varies from a fast cruise at 115 mph to economical cruise at 80 mph. Low noise with comfortable seating and visibility make long trips easy.
110 mph 175 kph
110 mph 175 kph
Stall Speed Gross wt
Flap - 4.5
Like high performance gliders, the Allegro has negative flap for cruise efficiency
50 mph 80 kph
Flap +15
46 mph 73 kph
Flap +48
The large and powerful flaps allow excellent short field landings making this a STOL aircraft
43 mph 69 kph
Rate of Climb
(At gross wt) Low weight and minimum drag give a good climb rate. Solo climb rate for the 100hp is 1,500 fpm
900fpm 3.7m/s
1200 fpm 5 m/s
Glide ratio
Glide ratio indicates the drag efficiency of the airframe and affects all performance parameters. Careful streamlining is everywhere including the smooth composite fuselage and low-drag cooling design. The long tapered wings also contribute to the excellent glide ratio. From 3,000, the Allegro will glide nearly 7 miles.
12 : 1
Sink Rate
Engine idle, at 70 mph the Allegro has a gentle sink rate of 500 fpm taking 6 minutes to descend from 3,000 feet. With full flaps, the rate is over 800 fpm and it can sideslip at 1,000 fpm .
500 -1400 fpm 2.5 - 7.0 m/s
Take Off
The 100hp engine combined with the 48 degree flaps make this a true STOL aircraft
500ft / 150m
400ft / 120m
(To clear 50ft / 15m)
1150ft / 350m
800ft / 250m
Landing
Good visibility all round, powerful flaps, hydraulic brakes and tough composite landing gear make the Allegro easy to land
Standard tank capacity is 63 litres / 17 gallons - all figures nil wind, no reserve at fastcruise 110 mph (175 kph)
450 miles / 650 km
400 miles / 560 km
Optional wing tanksincrease this to 103 litres / 28 gallons which offer remarkable range at economical cruise speed especially for the 80 hp engine. Figures at 85 mph (135 kph)
900 mi / 1,450 km
800 mi / 1300 km
Endurance
Standard tank at minimum power cruise of70 mph (115 kph) - all figures nil wind no reserve
7 hrs
5.5 hrs
Optional wing tanks
11 hrs
9.5 hrs
*Figures for 80hp are TAS at sea level with prop pitched to full cruise for economy. Max RPM is 5500 giving a top speed of 126mph/ 203kph. Changing the pitch to nearer a climb setting will increase speeds at all RPM and allow a higher climb rate and top speed (Vne) of 137mph/220kph. See Thom’s very detailed performance figures for the 80hp HERE
Note that for South East Asia with a typical density altitude of 3,000 feet, RPM required will be about 300 higher to reflect an effective power loss of about 6%. Figures do not apply to the ultralight version in Thailand
