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Indeed - training in 115FN & 216AR with Rich at Attitude. I like
the Grob a lot except for the constant stink of avgas. I really like Rich as an instructor. And Attitude have an extremely cool collection of aircraft to think about for later... John "Donovan" wrote in message om... "John Harper" wrote in message news:1060020100.727307@sj-nntpcache-5... Did my first accelerated spins yesterday (in a Grob). Woohoo. Unfortunately my stomach wasn't wild about them, so I only did a couple. But I did get to thinking about the aerodynamics of them (maybe as a way to forget my nausea!), and I had a couple of questions which I wondered if anyone here can answer. We recovered by un-accelerating the spin (stick slowly back) then a normal recovery. Even so it was pretty eye-popping and stomach churning. What would happen if you put in full anti-spin rudder while in a stable accelerated spin? There seem to be four possibilities: -- rudder stall -- rudder/vertical stab falls off (shades of AA587) -- the yaw is enough to break the spin (unstall the downgoing wing). But the yaw will rotate the airplane in the vertical plane, so now the nose will be pointing horizontally (or at least not nose down) with some random bank angle (-180 - +180) when suddenly both wings start flying again. This would really be the unusual attitude recovery from Hell since you could really be absolutely anywhere and massively disorientated with it. -- the yaw isn't enough to break the spin (gentle rudder application). This seems the most intriguing of all. Since you have airspeed, the rudder will cause continuing yaw - I guess flattening the spin somewhat. But now you have full anti-spin rudder which means that recovery options are limited! Presumably recovery would be: full pro-spin rudder, stick back to flatten the spin, then normal recovery - if you have any altitude left. Anyway I'd appreciate any comments from people who've tried any of this - of course I'll be asking my instructor next time I see him too. Thanks, John of all Hey John, You wouldn't happen to be doing your training at Attitude Aviation in Livermore would you? The reason I ask is there aren't too many places that use the Grob 115C. If so, who is your instructor? I did some aerobatic training there last year in the Grob, very cool plane. Only thing I don't like about doing acro in the Grob is the fuel smell that gets in the cockpit during manuevers. I flew with Rich Perkins and an older instructor who name has slipped my mine at the moment. |
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