Hi folks!
Today my old autogyro finally took to the air! I built the thing some 12-15 years ago and tried it back then, but it was sadly underpowered and the project stranded for many years. However, recently I found out I'd give it another shot, and today it finally took to the sky.
The gyro is designed by L. Holmgren from Sweden and is called "Gyrofighter". It has a 44" 4-blade rotor and uses a rotorhead made from Delrin and patented back in 1985 by the same L. Holmgren. Controls are rudder and elevons ( all tail.) For propulsion I use an old Saito .45 4-stroke I had lying around.
Now down to business. I said it flew, but I had the impression that it lacked a lot when it came to rotor efficiency. It had to be flown at full speed almost all the time, and it used half the county to get airborne even though we gave it a good prespin with the starter from my fieldbox. I'll admit it was a calm day with no wind and a little rain, but I still feel that 50 - 60 yds. for take-off is a little bit too much.
This leads me to thinking maybe I should get some more efficient blades, and on RCU everybody talks about how fantastic the SG6042 profile is. This sounds great to me, only problem beeing; I can't find any details, scetches or anything concerning this profile anywhere.
Please, can somebody help me!