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Sport Aerobatics magazine of May 1987 noted some wind tunnel tests by
Avions Mudry - the info was vague but apparently confirmed significant dynamic lift effects in snap rolls for the CAP 10. There are other effects - if the flight envelope is drawn from power off stall speeds at forward cg then its easy to get a higher load factor at the stall than that calculated. For the CAP 10B - Va is 146 mph and snap roll speed is 110 mph. The reference below gives some flight data on snap rolls in a Decathlon - not enough info for me to draw any conclusions on dynamic lift effects but concludes that overall the loads are within the design envelope. Some-one else may be able to analyse it - the only relevant time history data is a positive snap roll from inverted at 80 kts giving +3g peak. There are a number of standard design load cases - the designer must ensure that snap rolls, at the recommended entry speed, do not exceed the loads that they impose on the airframe - not always the same answer for every airplane. Reefrence: Loading Conditions Measured During Aerobatic Maneuvers by Albert W. Hall, Langley Research Center, NASA. SAE paper 700222. Greg Esres wrote in message . .. http://naca.larc.nasa.gov/reports/19...ca-tn-2525.pdf |
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