Super Cub drivers beginner's thread 2013

[robert]

Thanks renard80! It really does feel good to have a clean finale at the end of each flight. I'm usually all by myself out there, but the satisfaction of a pretty ending regardless of an audience is still very nice.

[hghost]

Sept 16, 2013 19:47:55 GMT 1 flydiver said:

Difference is in my case and my flying place I am not flying very high , plus I try and fly half or less throttle,

That's called a STALL, at low speed, close to the ground, a recipe for disaster. When you are flying at low speed you are close to stall. When you turn the dynamic is you partially stall the lower wing. If the speed is TOO SLOW, it's not partial, it's a COMPLETE stall and the wing simply drops > bad news if there is no room to recover.

[/quote]

That is probably the case .

Never thought of it that way .

Speeding up in the turns helped ( but still { to me anyway} it drops to hard in general )not use to it yet I guess .

When I first took off, it was smooth and pretty fast when I made the first turn it dropped allot ( in my thinking ) and that was about
3/4 throttle, I slowed to half or little less flying straight to see if it would stay level and it did, the next turn was little less
than 1/2 throttle and it dropped harder / faster and I flew around again that time in the turn it dropped way faster, that is when
it nose dived towards the ground managed to get the nose up and it hit the wheels and then nosed over.

Have to remember along with that up elevator to make sure speed is up in the turn....for some odd reason ( my mind ) easing off
some in the turn was right, realize that is not the case, knew to give some up elevator, but had to up allot and never even considered
the speed.....never even thought of a stall in that manner , don't know why I should have ? read , studied, built planes for years
and never even considered that ?

gee I feel really dumb about that . It is a Duh... moment....


Thanks Fly

[flydiver]

The slower you go, the less air goes over the control surfaces, the less effective they are. (Control surfaces on very slow moving 3D planes are relatively huge)
Go fast and a little elevator goes a l o n g ways, look at jet surfaces.
Go slow and you need a lot more elevator.
Going too slow, stalling the wing, then adding elevator actually adds to the problem if you've pushed it too far. Unfortunately the only cure now is enough speed to get the control surfaces working again. Seems counterproductive to give throttle when your plane is dropping toward the ground but if there is not enough room for gravity to do it, then that's the only out you have.
Best not to have to do it.

[nikodn]

As i am still learning i tend to fly at half throttle with my cub trimmed for level flight with little or no wind of course then when i initiate a turn the cub nose does drop a little i then compensate with either a little more throttle or up elevator. I think i read on this forum somewhere if you want to climb you should use more throttle and not use up elevator but in a turn i use a combination of one or both depending on the circumstances. When i fly my champ the difference is that there is not enough power alone using the throttle to climb or turn so i use both or up elevator. I've read that the cub flies like the champ but it does not !!!

[flydiver]

Most planes climb with throttle. But it doesn't have to be that way. You can design enough down thrust into the motor (lots in the Champ) to thwart that, and it's often a good idea when you get into seriously overpowered planes. Stock 'scale' type planes like the Cub behave that way though. You give them up elevator without some throttle support > they climb a bit, stall, and fall off.
You can also mix down elevator into the throttle. This is useful for some planes also, the Radian (many gliders) come to mind. They are designed for fast climbs to altitude and then slow non-powered flight. When they are in full powered climb the elevator setting is often way too aggressive and will cause a bad loop. I watched a guy completely loop his new Radian and nose it in at full throttle. He thought it was a slow gentle plane and was caught off guard. It is non-powered. It's pretty fast at WOT.
I do that to some of my jets and deltas also.

No, the Champ does not fly like the Cub. I did a fun thread in RCGroups calling the Champ a "Virtual SIM". Lots of Champ lovers got pretty riled by that. IMO, it's a one trick plane, with no parts that are reusable, designed to do one thing > teach you to fly cheaply.

[hghost]

Well in my case I have been flying the Champ so much , I was trying to fly the Cub like the Champ and your right Two Totally different planes , they do not fly alike .

I was also flying in not so great conditions, but I was trying to get time in before people showed up.

I love that Champ, actually repaired mine with a little thin balsa wood on the inside nose after it got mashed in when it hit a pole. have yet to fly it again
it is way to windy these past few days. ( I have a new one, have not flown it at all yet ) will fly this banged up one till it will not fly at all.

But i want to give this Cub another shot in much better conditions . Will do some more adjustments and remember to keep the speed up in the turns.

Guess my car racing- brake before entering -ease into turn -then - power through turns- will have to be for flying -stay level-throttle up as -enter turn-up elevator-back to level- and ease off throttle to stay level and not climb.

Mental exercise :

flying -stay level-throttle up as enter turn-up elevator-back to level- and ease off throttle to stay level and not climb.

flying -stay level-throttle up-enter turn-up elevator-back to level- and ease off throttle to stay level and not climb.

LOL

[Niko]

Flydiver! Read your post on rc groups with interest but it would take more than that to rile me but what you say is correct.
I know this is a cub forum but the champ is a great little plane in the right conditions and im glad i learned on this before the cub, it also is a great second plane for my flight experience.
If for some reason i can't fly the cub ( missis out 3 year old to look after) we go to the field with cub and toys for my lad and i get to fly, flying some thing is better than nothing. I always take the champ to the field incase something nasty happens to my cub...

[Niko]

Sorry we go to the field with champ and toys etc.....

[robert]

tight turns...

the conditions were perfect today with 2mph breze and blue skies. i brought the cub to work today and made suer the wings were supported even and true as it sat in the back seat of my van. i know that the z foam can deform if you bake it in the back of a car all day so, a couple of sweatshirts and a beach towel set it just right. after i dismissed my last class of 35 standard physical science students (nc public ed has no limit on number of kids per class anymore) i rolled out to the football practice fields. i have been gaining confidence in the stability and flight characteristics of this bird and found i was not taking full advantage of its capabilities. the push rods are in the second position from the outside as i'm more comfortable now, and i started to gradually increase stick input for tighter turns. i'm writing this for any new pilots out there to see that gradual transitions from small pulse stick movements can slowly be transitioned to more aggressive movements. i noticed that the nose doesn't drop exponentially with tighter turns. as long as throttle management is appropriate she will continue to tighten the turns as the stick stays in either left or right throw, and can maintain a constant altitude.

i was apprehensive at first as i thought that a sharper turn would have an equally sharper drop in pitch but discovered that wasn't realy the case. so get a comfortable altitude (20m-30m)and don't be afraid to test the cub's flight capabilities. you should be pleasantly surprised as to how aerobactic this trainer foamy really can be.

the landings are far more successful with the elevator pushrod closer to the body than they were on the farthest hole out, as the the flare is more prominent and can be achieved at even moderate speeds for nice long roll outs. much more realistic than nosing over.

great day with the super cub.

[jklong03]

Robert,

Glad to hear that you had such a nice day! My morning was similar, clear blue sky and no wind at all.

Sounds like you are well on your way, and the graduation from outer to inner holes can be a revelation. Just wait until the day you go for ailerons and brushless power up front, these little Cubs can indeed do some pretty spectacular maneuvers, especially once you get ready for the next step. Till then, keep up the practice and here's hoping for several more clear days before winter sets in.

PS I actually think that I am looking forward to the snow this year. We have many nice calm days here after a good snow storm blows through, and I am getting either floats or skis this winter.

[robert]

Thanks jkong. I'm planning on getting the floats as well in case we actually get some snow this winter in NC.

I'm going to an rc expo this weekend in Raleigh and plan on getting a simulator to learn ailerons and wait till next month or November to add the t28 Trojan to the hangar. I figure as my hands are less nimble than prior to my neck injury, I'll let HobbyZone make the planes and I'll stick to flying them. I did the simple mods in regard to firming up the cub, but I'm pretty sure that wiring servos and making precision cuts lies outside the parameters of what the three fingers on my "good" hand can handle.

I sure do enjoy the cub and appreciate your support. Can't wait for more flights tomorrow and watching the pros on Saturday.