Hi. I'm Tommy.

[TommyLM]

Looking forward to discussion on this site. I am training for a US sport license. I am looking at the Jabiru J230 because of the baggage capacity. It will fit a golf bag. Do the springs on the controls affect handling feel. Seems odd on a small plane.

 

 

[Robbo]

Welcome Tommy

 

 

[biggles]

Looking forward to discussion on this site. I am training for a US sport license. I am looking at the Jabiru J230 because of the baggage capacity. It will fit a golf bag. Do the springs on the controls affect handling feel. Seems odd on a small plane.

What springs are you referring to Tommy ...... Bob

 

 

[TommyLM]

What springs are you referring to Tommy ...... Bob

Hi Bob. The ailerons and elevator controls are spring loaded according to some reviews I've seen on the J230. IOW there is no direct connection between the stick and say the elevator. A spring is used somewhere in between to keep tension. The response feel has been described as jet like, which I assume means smooth but a bit damped.

 

 

[TommyLM]

Welcome Tommy

Thanks Robbo.

 

 

[Camel]

Hi Bob. The ailerons and elevator controls are spring loaded according to some reviews I've seen on the J230. IOW there is no direct connection between the stick and say the elevator. A spring is used somewhere in between to keep tension. The response feel has been described as jet like, which I assume means smooth but a bit damped.

Welcome,

 

The only springs I know of are on the rudder pedals, they are mounted from pedals to centre consol.

 

 

[biggles]

Hi Bob. The ailerons and elevator controls are spring loaded according to some reviews I've seen on the J230. IOW there is no direct connection between the stick and say the elevator. A spring is used somewhere in between to keep tension. The response feel has been described as jet like, which I assume means smooth but a bit damped.

Tommy , the ailerons and elevator are directly connected to the control stick. The only springs are those on the elevator trim system that merely assist, or bias the operation making the stick forces lighter. The upper cable in the picture , connected to the elevator control horn , is directly from the control stick , and the lower cable part of the trim system ..... Bob

 

 

 

[facthunter]

The controls are direct by push pull cables so the feel isn't as good as a system where it's done with ball bearings, bell cranks and rods. The elevator trim is done by springs but trim is just to relieve control forces as speed changes, mainly. Nev

 

 

[TommyLM]

Tommy , the ailerons and elevator are directly connected to the control stick. The only springs are those on the elevator trim system that merely assist, or bias the operation making the stick forces lighter. The upper cable in the picture , connected to the elevator control horn , is directly from the control stick , and the lower cable part of the trim system ..... Bob[ATTACH=full]40924[/ATTACH]

Thanks folks. I see that there is direct cable connection to the controls. Maybe the springs I read about are in the control stick mechanism. Does it change the feel of the airplane? See the excerpts from two articles below.

 

"Unlike most light sport aircraft, the J230 controls are solid. Jabiru designed fluttery controls out of the airplane by linking the controls to springs. The pilot works against the spring to deflect the controls. The downside of this is that the pilot doesn’t get a lot of tactile feedback from the control surface itself. In this way, it feels more like flying a jet than a tiny high-wing."

 

"

 

In between the seats is a tall stick that rotates left and right on a vaguely J-shaped apparatus that also supports the pivot for the pitch function. The rod attached to the stick below the foam grip is your first clue about Teleflex cables. Huh? Instead of conventional pull cables or torque tubes and pushrods, the Jabiru uses Teleflex push-pull cables for pitch, roll and yaw. The single pitch-control cable arrives up under the center console and attaches to the stick a few inches above the pivot; aileron control cables (one for each wing) attach behind the seats and travel upward in an arc to the wingroots.

 

Teleflex cables have some distinct advantages, primary among them simplicity and easy rigging of the controls. On the other side of the ledger: They represent a single-point failure (but then so does a single elevator pushrod, for example) and have inherent friction. Despite employing spring centering packs, the controls lack definition. Move them a bit from their resting place and they tend to stay there. Resistance to movement is discernible on the ground, and you wonder what it will do to the flying qualities."

 

Has anyone found this to be an issue while flying?

 

Thanks

 

 

[TommyLM]

Tommy , the ailerons and elevator are directly connected to the control stick. The only springs are those on the elevator trim system that merely assist, or bias the operation making the stick forces lighter. The upper cable in the picture , connected to the elevator control horn , is directly from the control stick , and the lower cable part of the trim system ..... Bob[ATTACH=full]40924[/ATTACH]

Thanks for the picture!

 

 

[frank marriott]

you wonder what it will do to the flying qualities."

Appears to be written by someone who has not even flown one. Best answer is to find one, any model, and go for a fly and decide for yourself.

 

 

[TommyLM]

Thanks folks. I see that there is direct cable connection to the controls. Maybe the springs I read about are in the control stick mechanism. Does it change the feel of the airplane? See the excerpts from two articles below."Unlike most light sport aircraft, the J230 controls are solid. Jabiru designed fluttery controls out of the airplane by linking the controls to springs. The pilot works against the spring to deflect the controls. The downside of this is that the pilot doesn’t get a lot of tactile feedback from the control surface itself. In this way, it feels more like flying a jet than a tiny high-wing."

"

 

In between the seats is a tall stick that rotates left and right on a vaguely J-shaped apparatus that also supports the pivot for the pitch function. The rod attached to the stick below the foam grip is your first clue about Teleflex cables. Huh? Instead of conventional pull cables or torque tubes and pushrods, the Jabiru uses Teleflex push-pull cables for pitch, roll and yaw. The single pitch-control cable arrives up under the center console and attaches to the stick a few inches above the pivot; aileron control cables (one for each wing) attach behind the seats and travel upward in an arc to the wingroots.

 

Teleflex cables have some distinct advantages, primary among them simplicity and easy rigging of the controls. On the other side of the ledger: They represent a single-point failure (but then so does a single elevator pushrod, for example) and have inherent friction. Despite employing spring centering packs, the controls lack definition. Move them a bit from their resting place and they tend to stay there. Resistance to movement is discernible on the ground, and you wonder what it will do to the flying qualities."

 

Has anyone found this to be an issue while flying?

 

Thanks

PS On the other hand it would make sense that the springs are located distally at the control itself just like a motorcycle brake as a return.

 

 

[facthunter]

There is only one spring system there and that is on the elevator for trimming forces out of it in flight. You trim back when slow and forward when fast as with other trim systems many of which have a tab and a mechanism to move it. This set up applies a spring force when you activate it to the control in the direction you wish it and the amount you require..If you are at or near the in trim for speed position it applies negligible force.Nev