#10 Helicopter: Engines with 20 HP

1.  HP and PS are almost same
2. 20HP engines are in Bullet Honda Hness. No weight information given.
3. Can make Aerolite 103 type aircraft with 2 of these engines
4. Or go and make electric motor that rotates at the same RPM as the propeller or main rotor and use that.
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7. Rotax 447 40HP is 29 kg in weight
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