I fly RC Extra300 and I can do tumbling once only but is there any way of doing it at least 3 consecutive times? Please let me know. Thanks

• RE: Lomcevak or Continuous Tumbling,Ben_Chiu, 18:14z, 07-17-03
• RE: Lomcevak or Continuous Tumbling,DHamblin, 18:13z, 07-18-03
  • RE: Lomcevak or Continuous Tumbling,Roque, 18:27z, 07-18-03
    • RE: Lomcevak or Continuous Tumbling,DHamblin, 12:44z, 07-21-03
      • RE: Lomcevak or Continuous Tumbling,Ben_Chiu, 17:15z, 07-25-03

Greetings:

> I fly RC Extra300 and I can do tumbling once only but is there any way
> of doing it at least 3 consecutive times? Please let me know. Thanks

I can't comment on the maneuver, but off the top of my head there are a couple of issues unique to RC that may apply in addition to technique issues--which I'll allow others more qualified to address. It may be something as "simple" as carrying more energy/energy management or timing.

But keep in mind that what may be possible in the real thing may not be possible in a scale version and vice versa. This may be due to control throws and performance (thrust, lift and drag) differences.

Hope this helps.

Ben

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What RC Extra300 are you flying? That would help with giving a specific answer.

I have a .60 size Great Planes Extra 300 (painted up as Patty's 2000 scheme of course) with a Saito 1.20 4-stroke in it. It will tumble 3 or more times whether I enter upright or inverted (eventually it loses enough energy and ends up in a knife edge spin if I hold the controls in).

Obviously power helps as this maneuver will really kill off airspeed, and also its possible that you may be using more control throw than you need where you are losing your energy too fast.

Let us know the plane and how you are entering the maneuver and we will see if we can help.

Dave Hamblin
(formerly DaveH on old site!)

Thanks Dave, It's Midwest 81 inch with 45cc zenhoa gas engine. There's no problem with the power, control surfaces maybe just maybe to much. I go up then the two sticks to the upper left then keep holding it and after one turn it becomes a regular spin.

I haven't flown the Midwest version, but as I recall its got airfoli shaped tail surfaces vs flat rounds stabs.

With my .60 size one (72 inch wingspan), I have two ways I do a "tumble". The first is I will roll inverted (looks better to me) then corner both sticks to the left as you do (full throttle, full down, full left aileron, full left rudder). It will generally tumbe 2-3 times and fall into a knife edge spin when the energy drops.

A second way is I climb at a 45 degree angle, and basically do an upright snap (full up elevator, left rudder, some or full left aileron). I hold this and the plane snaps two or three times violently until its almost stalled and its generally nose up (at full throttle), at this point I put in full down and it typically does a couple more tumbles and often ends up in an inverted falling leaf type stall.

They tumble better with an aft CG, but move it carefulley as I once watched a RC bipe of mine spin down to the ground as I had a too far aft CG and it wouldn't stop.

Try different timings of when you put in the controls etc and eventually you will find what works best with that model.

Dave Hamblin
(formerly DaveH on old site!)

Greetings Dave:

> They tumble better with an aft CG, but move it carefulley as I once
> watched a RC bipe of mine spin down to the ground as I had a too far aft
> CG and it wouldn't stop.

Doh!

The only thing worse I've seen was when a guy was flying a brand new ARF ("Almost Ready to Fly" for the non-R/C'ers here) of a Dago Red from the local hobby shop. He was buzzing at a pretty good clip when the wings folded up on him. He was so disgusted when he saw this happen, he just turned off his transmitter and placed it on the ground and walked away while shaking his head before the pieces hit the ground.

Ben

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