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Yeah there is some funny vibrations in the Safari. The first is at 400
rotor rpm if you are on hard pack like concrete or pavement. It doesn't show if you are on the grass. (I just changed the fuel tank bracing and this vibration seems to have either disappeared or reduced greatly) The other is if you overspeed the rotor a bunch..Like 525 rotor rpm when the red line is 500.(CHR has experimented with the rotor and at least one time oversped the rotor to something like 550 and didn't get the vibration. Hopefully a mod will be in the books soon) I developed a rotor speed alarm circuit which provides a tone in the headset for both low and high rotor speeds; this has solved the overspeed problem for me. I also have a 2/rev that shows up at 1/2 tank fuel but is not there with full fuel. This 2/rev isn't bad enough to stop flying, but it is aggravating enough to stay on my list of problems. The clinking at rotor engagement is not the overrunning clutch but the centrifugal clutch. There are some techniques that minimze this. Actually, I have a set of clutch shoes that did not clink. I haven't the foggiest why these were different, but my starting procedure was to get the engine running and then go off looking at gages and putting my helmet on leaving the engine idling at 1,000. The clutch would engage itself smoothly and everything would be fine. This isn't true with the present clutch shoes. I know another guy that went from the Brantly to the R22 and he now has a 206A that he is rebuilding. $$$$ Stu Fields "Murphy's law" wrote in message om... "Kathryn & Stuart Fields" wrote in message ... I currently fly a Safari and have never had the flicker problem that I had in the Brantly. I do wear a helmet with a visor.. I thought I knew most of the Safari owners. Your moniker and e-mail aren't familiar... What happened to your Safari?? Stu Fields I bought the Safari not knowing the unique vibration problem Safari also have a clinking overruning clutch at runup Big bubble rattle Safari was sold with 15% profit "Murphy's law" wrote in message om... "Stu & Kathy Fields" wrote in message ... One thing I noticed in the Brantly was that the rotor positioned so close to the bubble could and did cause a very annoying flicker with the sun at the right angle. A hat with a bill would be a must. I agree with on poster the Brantly I flew was relatively smooth. I don't think that they made the prettiest helo tho..More like a horizontal ice cream cone. I remember a story Ken Brock told me about running out of power with a passenger at a density altitude of about 3,500 but he was on a pinnacle and didn't have all the ground effect he would have liked.. For my money, if I was located at a place where the density altitude rarely got above 4,000, I would consider the Brantly because it was so easy to fly. In any bubble type plexi cabin a some kind of sunvisor is a must to block sunglare I had a Rotorway Exec 90, a Safari, have an R22, a Brantly B2, so I know the difference The Brantly is kid'a funny looking, but the beauty is in the eye of the beholder As the matter of fact, the cone shaped fuselage is an airstream stabilizer The flying characteristics must be the main concern in any aircraft Stu Fields Safari Driver. "Murphy's law" wrote in message om... (Davdirect) wrote in message ... I agree with you about watching the tip path, being careful, approaching from the right place,etc. however to untrained passengers I could see where this could be a problem, thats all. Dave davdirect The PIC is always responsible for the safety of passengers & the safe operation of the rotorcraft. Placard in Brantly : ROTOR MUST BE STOPPED WHILE LOADING AND UNLOADING PASSENGERS Even so tip path plane is over 6 feet high, that's all folks |
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