Technical data

Table of optimal speed at setting the blades from the smallest, which is 12 degrees, to the

biggest, which is 22 degrees. Engine with the reductor at 1:1.27./Rotax 912,914/ is assumed.

It is obvious that due to the output of the engine it is not possible to accomplish for all setting

sof all revolutions. The table introduces the speeds in km per hour in the slopes.

Revolutions of the engine Setting of the airscrew blades in degrees

12 17 22

3500 78 110 141

3600 80 113 145

3700 83 116 149

3800 85 119 153

3900 87 122 157

4000 89 125 161

4100 92 128 165

4200 94 132 169

4300 96 135 173

4400 98 138 177

4500 101 141 181

4600 103 144 186

4700 105 147 190

4800 107 150 194

4900 110 154 198

5000 112 157 202

5100 114 160 206

5200 116 163 210

5300 119 166 214

5400 121 169 218

5500 123 172 222

The effectiveness of airscrew work optimisation is not enough to ensure the flight with relatively

low consumption. Also the engine with exact effectiveness and its consumption is not increasing

with the revolutions in linear way, but it is increasing slightly progressively. / it mostly grows

between 3.500 and 5.500 revolutions /. We recommend to go through information in the

operating handbook of the engine, which is a part of the delivery. Also, there are introduced all

dependencies of the output of the engine on height of the flight and temperature of the air.