GYROX
Junior Member
- Joined
- Sep 20, 2006
- Messages
- 11
- Location
- Larne Northern Ireland
- Aircraft
- MT-03 Gyroplane
- Total Flight Time
- 330
Imagine the scenario - A gyroplane sits on a farm strip which has become a bit soft underfoot from heavy rain the previous day.
To add to the difficulties the grass has been left to grow a little too high for comfort and is still wet. Maybe the tyres on the aircraft are also a little soft.
The aircraft however is fitted with a decent pre-rotator which can take the rotor up to 200+ RPM. Also there is no wind...
My question is as follows - given this high ground drag environment how does the lift profile of the rotor effect the time to achieve an eventual take off?
In other words, does a rotor start to give partial lift at say 200 RPM so that as the aircraft moves off (somewhat laboring) across the soft ground, the aircraft becomes increasingly "lighter" and can slowly achieve full rotor RPM.(i.e. displaying a somewhat linear lift profile)
Or does the rotor have to be very close to full RPM before any noticeable lift is achieved and therefore the aircraft ends up wallowing along,hanging off the back of the drag curve, too heavy and sluggish and very unlikely to achieve enough ground speed to enable the rotor to attain full rotor RPM
Obviously variable weights of the aircraft (e.g. Fuel. payload etc) will magnify the effect but the principle I guess stays the same?
Regards to all on the Forum - this is my first posting
To add to the difficulties the grass has been left to grow a little too high for comfort and is still wet. Maybe the tyres on the aircraft are also a little soft.
The aircraft however is fitted with a decent pre-rotator which can take the rotor up to 200+ RPM. Also there is no wind...
My question is as follows - given this high ground drag environment how does the lift profile of the rotor effect the time to achieve an eventual take off?
In other words, does a rotor start to give partial lift at say 200 RPM so that as the aircraft moves off (somewhat laboring) across the soft ground, the aircraft becomes increasingly "lighter" and can slowly achieve full rotor RPM.(i.e. displaying a somewhat linear lift profile)
Or does the rotor have to be very close to full RPM before any noticeable lift is achieved and therefore the aircraft ends up wallowing along,hanging off the back of the drag curve, too heavy and sluggish and very unlikely to achieve enough ground speed to enable the rotor to attain full rotor RPM
Obviously variable weights of the aircraft (e.g. Fuel. payload etc) will magnify the effect but the principle I guess stays the same?
Regards to all on the Forum - this is my first posting