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Old 09-24-2004 | 06:02 PM
  #11  
sigrun
 
Joined: Jul 2003
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From: Dunnunda, AUSTRALIA
Default RE: How do I enter a spin?

Hi ksechler

Having come to R/C after having spun many full size types IRL, quite to my surprise in my early attempts I discovered an universal anomoly occurs when attempting to spin an R/C model vs the real McCoy. Classic full size spin entry will only result in a spiral dive developing for a your typical R/C model...which is precisely what you are experiencing.

The following spin entry techique pretty much works for any R/C model which will stall and has the CogG located sufficiently aft such that it will spin. Non-dynamic stall spin entry described.

Select an entry heading and reduce power to flight idle. Smoothly increase back stick (elevator) as speed bleeds off raising the nose to maintain original height. At the point of stall smoothly apply full back stick simultaneously with full rudder in the intended direction of the spin plus apply full aileron in the direction of the intended spin. Yes, full in-spin aileron! The model will incipient spin. To stabilise and maintain the spin, just hold the controls there and count off the rotations until you want to exit. Nose attitude and rate of rotation are dependent upon the individual model & type.

Recovery with an exit on line requires anticipation (ΒΌ turn lead at most), but generally all that is required with any R/C model I've flown is simply to centralise the controls, wait until the rotation stops (quasi-instantaneous with R/C models), recover the nose to the horizon with elevator whilst maintaining wings level with aileron and line (heading/track) with rudder, smoothly apply power and fly away. Quite different, even with idiosyncratic type variation, from full size IRL.

The requirement of application of aileron in the direction of spin to initiate and to maintain same is the anomoly. I've not yet found an R/C model which will initiate a true incipient spin without it. Suggest that you go with engine torque & initially initiate left hand spin entries until you're comfortable with spinning and recovery.

As you've discovered, if you apply positive outspin aileron at the point of entry, instead of initiating a wing drop and assisting spin entry or inciting a dynamic entry as as it frequently does IRL, it denies spin entry in an R/C model completely. Neutral aileron (non-application) in a spinnable R/C model simply results in it entering a spiral dive.