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Va and negative g's & fun non-acrobatic maneuvers
Me again,
Va seems to be only intended to protect against excessive positive load factors. What about negative g's? Can I find a Va for negative design load factors (-1.52 g) for the C172SP anywhere? Reason I am asking is that I want to try the "floating pencil" trick next time I fly but I don't want to shove the stick fully forward for fear of breaking something. I am not looking to induce negative g's, only zero g's and zero lift. Any pointers on entry speed and power settings? Is it easier to perform if you induce a gradual +1 g steep climb similar to a departure stall maneuver, then upon hearing the stall horn, give it good nudge forward on the stick? I've heard that your airspeed may indicate well below stall, but again, your stall speed does approach zero as your load factor goes to zero. Likewise, would you prefer to pull 2 positive g's in a pull-up maneuver or a, say, 60 deg. bank? Frankly, I am not too familiar with the former so I might do something undesirable. Aside from my stall speed going up to something like 68 kts. clean (Va ~ 100 kts), you'd see your airspeed quickly dwindling while pulling up. I think it'd be fruitless to add in power since heck, you're not maintaining altitude and besides, you probably don't have any excess power anyway to do that. Neither am I familiar with the mechanics of loops so it'd be wiser to leave that alone. Perhaps the 60 deg. bank is more reasonable to have some fun. Would you try to hold altitude with backpressure and power or just leave the plane to dive and speed up in the spiral, with a recovery before Vne? I think the maneuver would be more innocuous with power-off a-la-emergency-descent style. Again, I've never done a 60 deg. bank...so I should probably leave that alone too until I try it with a passenger...oops..i mean CFI. Seriously, if someone has something to suggest that's fun and safe, within normal operating range and category, please suggest. It's a buddy's bday soon and he wants to go up. Again, I am not looking for doing anything aerobatic. Alright, I can see the flames and derision coming from the mainland May you have a peaceful week with no stress, Alex |
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