How to improve landing of this craft?

[Numerlor]

I'm making plane that would be super easy to control, I already got it but landing is "hard" stall speed is too low and it bounces off runway when landing, tried airbrakes, didn't help too much and I don't like the idea of drogue chutes http://www.filedropper.com/trainingcraft

[cratercracker]

1.You place landing gear wrong! This "quadro" variant of laning gear can be a traitor during the landing!

2.Wanna stop very quickly?-lithobrake add some seperatrons to the front,they kill off a lot of speed even if you going to land 123m/s.

3.If you're still bouncing off the runway ,try to lower you landing gear, deeper intothe fuselage. It will make take off a bit hard ,though it will make the landing a bit easier.

4, If nothing helps ,place the wheels a bit inclined sideways. But remember the takeoff will be quite long if you will use such way.

 

[Numerlor]

15 minutes ago, cratercracker said:

4, If nothing helps ,place the wheels a bit inclined sideways. But remember the takeoff will be quite long if you will use such way.

This incerased landing speed to something around 80 at flat surface and takeoff is longer by mybe half of second because of huge lift from wings, but still not best for determining if you're bad pilot or plane designer.
Any more good advice?

Edited April 13, 2017 by Numerlor

[StahnAileron]

Your biggest landing issue is the fact your landing gear is so far from the Center of Mass of the vessel. The wheels at like a pivot/fulcrum when you land. If it's that far away from the CoM, the weight makes the vessel act like a giant lever, slamming the front down. (I'm guessing this is what your hard and bouncy landing probably look like.)

Best thing to do is get the gears just behind the CoM (maybe just a little further than where you have the Center of Lift). Doing this will let the wheels take the brunt of the weight of the craft without torqueing so much on landing. At that point, you just need to adjust the springs and dampeners.

Also, there is no such thing as "too low" a stall speed. The slower you can fly, the more lift the design has to work with. The more lift you can work with, the softer the landing can be.

But yeah, first thing up: move those rear gears forward more. They're way too far back for comfortable landing. In Real Life, most aircraft have their main (weight-bearing) gears near the center of mass for a reason. (The nose-wheel is just for balancing and ground steering, really.) If you have problem with ground clearance (you're hitting the ground with the end of the plane), use bigger/taller gears. (The taller the gears, the further behind the CoM you should place them so they don't wind up ahead of the CoM on ground contact due to your Angle of Attack.)

By the way, moving those rear gears forward will also make it easier to take-off...

[Regor]

That canard is huuuge. You don't need a canard that big. 

38 minutes ago, Numerlor said:

I'm making plane that would be super easy to control, I already got it but landing is "hard" stall speed is too low and it bounces off runway when landing, tried airbrakes, didn't help too much and I don't like the idea of drogue chutes http://www.filedropper.com/trainingcraft

Try pitching higher than the navball up/down separator, so it is less likely to bounce into the distance.

[cratercracker]

18 minutes ago, Numerlor said:

Any more good advice?

One last thing:

If your craft is very manueverable try landing bakcwards. I am not great at flying planes (though i am not that bad) but here is what you need to do:

1.When approaching make an unfinished loop and make your craft fall down with engine pointed to the surface.

2.After falling an optimal amount of meters and bleeding off enough of speed swith off all the elevons and use SAS to turn the plane or make your elevons deploy into an opposite direction.

3.Glide down  backwards to the surface and touchdown slowly using your back landing gear. Landing gear at the back are usually more wide than the front ones (if plane is built correctly). So landing would be nice and smooth.

This is called the Ivanchey manuever (ivanchey is my surname)

[Numerlor]

@StahnAileron This helped a lot, it is swinging a bit at landing but much better than going 2 km more than expected

Edited April 13, 2017 by Numerlor

[StahnAileron]

4 hours ago, mabdi36 said:

That canard is huuuge. You don't need a canard that big. 

It's not that he needs it, it's more that he wants it there to shift the Center of Lift forward. A tight CoL (well main CoL; KSP sucks with showing detailed info due to lots of abstraction...) and CoM make aircraft more maneuverable, which is his goal. Unorthodox look, sure, but not all to different from Burt Rutan designs. Smaller carnard would LOOK nicer, but probably wouldn't give him the lift and therefore effects he's looking for.

@Numerlor Glad that helped you. The swinging part is more pilot skill: landing level and not touching yaw or roll on touch down. I've screwed up landing by doing something stupid like trying to steer on touchdown because I'm a little misaligned. (It's better to just roll off the side of the runway...) On the other hand, you could just max out the dampener and spring settings on the gears. I find the stock gears are a bit "mushy" for their size.

You have to balance the width as well: Narrow is easier landing/touchdown but more unstable (more likely to tip/roll over); wider is more stable handling on the ground, but you have to touchdown on-point and level or risk slamming down a side which can ruin your landing. (Again, you shouldn't be too far away from the CoM.) Personally, I'd probably place the gears about as wide as the intakes and no wider. (At most, as wide as the airbrakes.) It's a fairly light design for the lift you have, so you don't need gears that wide apart at all. (I guess a general rule of thumb could be the gears should be within the center third of the plane's width...?)