There's a system that allows you to engage the rotor from the engine (The Pre Rotor) and while stationary you power the rotor up to around 200 rpm then you disengage the rotor. Once you have started to make your take off run the air is forced through the rotor which increases its speed. Once the rotor gets to around 400 rpm you're airborne ( as I understand it) I'm not sure if all gyros get the benefit of ground effect, but the Arrow copter has small wings and that does.
More leverage less force required and less leverage requires more force. Now that takes care of the handle. Set tension and torque remain constant. Two distinct and separate aspects of any torque wrench.
True enough for a beam type torque wrench. Absurd for modern click/beep types. The former actually measure the bend in the handle, so if you're not gripping in the right spot, the handle doesn't bend and therefore you'll apply (perhaps a great deal) more torque than desired. The click/beep type will be accurate regardless of where they're held. Wolfgang has a clicker, so he's fine.
I'm sure you know this by now, per the POH for the Cavalon it says stick all the way back then forward to prevent hopping into the air before Vx or Vy is achieved. Sure it'll fly but luckily you don't have winds.
Oh yes, I know... This were the first two solo flights with a Cavalon 914 Turbo and the power surprised me a little... The training in the Cavalon was done with a Cavalon 912S with only 100 hp and a FI beside me.....
Is the main blade propelled by the engine? I thought the lift came from the forward movement. But the main blade is moving while the aircraft is on the ground before takeoff . What an amazing machine!
I don't like the way the tail boom is bent. It drags the ground behind it grey area for me. I'm not an expert but I would redesign the tail boom to a more strait back configuration if feasible.
I Guess the tool manufacturers should call you, they seem to think otherwise..... "To achieve an accurate torque reading, you must use a torque wrench correctly. You have to hold the tool on the hand grip, and either push or pull on this part of the handle only. If the hand grip has a pivot point, you have to hold the handle so the load is balanced over the pivot point." www1.snapon.com/display/231/ToolNews/TechRefs/2008/TorqueWrench08.pdf Luckily he was using it on a non critical component like the rotor blade so exacting measurements shouldn't really matter...
CBM 215 "Did not know the USAF was using Gyro Copters now and were experts on them?" The US Air Force began using Gyrocopters in 1968, and they were designated X-25s. There were X-25, X-25A, and X-25B variants. But one needn't be an expert on gyroplanes to know how to use a torque wrench; that's general mechanical knowledge.
Not clear why the blade is spinning at such a high rate when craft is standing still on the ground. Is there some mechanism that initiates the rotation?
RickTorn sure that there is. It is essential if you want to start flying. Usually it is needed a 200 rpm, then you release the clutch and the rotor is free to run. The air will be the "tool" that keep it running (at a faster rate). That's the way every gyro works. 😉
Tecnobingo "That's the way every gyro works." No, it's not. Many small gyroplanes do not have prerotors; you start the rotor turning by hand and then use a long takeoff roll to get them up to speed.
Oh yes, i am very happy with it :-) One change is necessary: A pressure compensation device for the pneumatic trim. AutoGyro will upgrade the Cavalon with this feature soon . This will keep the flight smoother and easier.
It's called "pre-rotating", on some, this is done by hand. This one is temporarily connected to the engine most likely via belts. Typically they are spun up to around 200 rpm before disconnecting from the engine. This greatly reduces the length of the takeoff. Opps. I see that Rod already answered this question.. (guess I should read the whole thread first)
Wolfgang, what are your operating cost per flying hour, do you use mo gas, have you had any need for factory support,ad what are your opinions of the Cavalon Gyro overall?
Rick Cahill Hi Rick, the operating cost depends on the annual flight time, of course. I never calculated it and I will not do it in the future ;-)Yes - i use mogas (super plus, called in Germany).Another "yes" to your question about the support: The clutch for pre rotating got broken after about 30 h. AutoGyro did the repair w/o charging material costs and charging only half of the hourly wages (as the warranty had expired only two months before). I feel the Cavalon was one of the best side by side gyrocopters with German certification. i would buy it again ;-)
www.auto-gyro.com/en/Cavalon/Configuration/ for a first glimpse of your next pretty invoice :D usually you will contact a sales partner from www.auto-gyro.com/en/Locations-Partners/
