Launching Update

Update on MiG-15 Launching Technique

Here is a launch tip for anyone who’s struggled to get the Hobby Lobby MiG-15 airborne reliably:

First, recognize that at FULL throttle, there is a small tendency to want to pitch up (probably due to the large mid-T tail configuration more than thrust lines.

Second, recognize that this is not a prop plane so there is no prop wash flowing over the control surfaces. All control surface effectiveness is due purely to forward speed. During a hand launch, forward speed is at it’s slowest and control surface effectiveness is at it’s lowest.

The problem: At full throttle and very slow speeds, the tendency to nose up is stronger than the control surface effectiveness, so right after the aircraft is thrown, even with full down elevator you may not be able to overcome the nose up force of the motor. This leads to the aircraft floundering … the full thrust is pushing the nose up, keeping a high angle of attack, and forcing slow flight speeds. The control surfaces can’t compensate due to slow flight speeds and no prop wash to help out. You can’t push the nose down, you never begin to accelerate, and often the flight ends after a few seconds as the aircraft stalls/flops/cartwheels in.

The solution: Launch at 2/3 to 3/4 throttle. (Basically keep the throttle as slow as you dare on launch.) Throw the aircraft level or even on a slightly nose down trajectory. This reduces the tendency to nose up, allows gravity to help accelerate the aircraft a bit, and allows the aircraft to accelerate naturally, and fly off as expected.

The launch problems with the MiG-15 are EXTREMELY frustrating, but once you get your launches dialed in, this little bird is a blast and really performs well! One final tip: this MiG does have a nasty spin if you manage to stall it. I try to hold at least 1/3 to 1/2 throttle through my turns and I’m careful not to pull too hard on the elevator. Let the plane fly itself, keep your control inputs light and you should have no trouble staying above stall/snap speed.

One Reply to “Launching Update”

  1. Admin,

    The company formerly known as Hobby Lobby International, Inc. has undergone a name change to become Hobby Express. While Hobby Express will continue to offer the same products and exceptional customer service in our online shopping domain, we would like to make you aware that the URL previously listed as http://www.hobby-lobby.com will soon be obsolete, and replaced by http://www.hobbyexpress.com/.

    Our system has found the obsolete URL link on the following pages of your website:
    http://gallinazo.flightgear.org/category/model-airplanes/retired/mig-15/

    Once again, the link listed on these pages will soon be obsolete and replaced by our new URL, http://www.hobbyexpress.com. Our team at Hobby Express would be very grateful if you could simply update the links found on these pages to our new URL. Feel free to read more about Hobby Lobby International’s branding change to Hobby Express here:
    http://blog.hobbyexpress.com/uncategorized/hobby-lobby-international-rebrands-to-become-hobby-express/

    Thank you very much!

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