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Old Yesterday, 09:43 PM
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mhills51's Avatar
kansas city
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Yes I would of spent the money on a real one for the front then you wouldn't get the binding and it would have the damper. You could still get the wire to work. You just have to know were to bend it at. I just hope the extra drag on your tail servo works out OK! But again a lot of trial and error! Dam if you do and dam if you don't lol!
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Old Today, 04:59 AM
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Quote:
Originally Posted by mhills51 View Post
Yes I would of spent the money on a real one for the front then you wouldn't get the binding and it would have the damper. You could still get the wire to work. You just have to know were to bend it at. I just hope the extra drag on your tail servo works out OK! But again a lot of trial and error! Dam if you do and dam if you don't lol!

Your probably right on finding the right bend to make a castering wheel work out, I just couldn't find it. I can tell you a simple sweep aft of the nose wheel with one bend didn't work. In theory it sounds like it would be perfect but put the weight of a 12 cell above it pressing down and the strut locks up like its in a vise.
With the straight nose strut even with weight applied it stays rotationally free.
I would need some fancy bends to the strut or have it mounted in a good set of bearings for the castering strut to work out I guess.

In ground testing I really don't see the very small amount of drag created by the flex shaft to be any issue at all in flight.
The flex cable is routed in a gentle arc to the nose wheel so it's really smooth and free.
I base my suspicions on the fact I have zero friction in the tail rotor control rod the way I have it set up.
If the guys running stock setups with their control rods bent through the control rod guide don't have any issues I shouldn't either.
I know how much friction is in the tail control rod of the stock setup and the friction of the flex cable forward to the nose wheel is much less than that so I am hoping there will be no change in flight performance at all.

Today will tell the story and I am nervous but just like the initial tests with the fixed nose wheel tricycle gear which I was very worried over, and as it turns out I was worried over nothing, I am hoping to repeat that finding with the steerable nose wheel.

So today it's either ...or .
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Old Today, 09:02 AM
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Works perfectly so far.

Just one flight into the steerable nose wheel and I can say without hesitation it works perfectly and is a blast.
Just did 90 degree rolling turns while on the ground so far but it was like it was on rails. The SK720BE works perfectly in contact with the ground. Didn't use any cyclic in the turns, just a little collective to get it moving and a little rudder for direction.
I'll continue to practice latter, just wanted to know it would work which it does very well.
In flight the performance of the tail is the same, real quick and sharp.

More practice when I get the chance and a video as well.
I am a happy guy....and relieved.
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Old Today, 09:32 AM
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United States, FL, Palm Coast
Joined Mar 2012
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Originally Posted by A VIKING View Post
Just one flight into the steerable nose wheel and I can say without hesitation it works perfectly and is a blast.
Just did 90 degree rolling turns while on the ground so far but it was like it was on rails. The SK720BE works perfectly in contact with the ground. Didn't use any cyclic in the turns, just a little collective to get it moving and a little rudder for direction.
I'll continue to practice latter, just wanted to know it would work which it does very well.
In flight the performance of the tail is the same, real quick and sharp.

More practice when I get the chance and a video as well.
I am a happy guy....and relieved.
NOW it's done...
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Old Today, 10:05 AM
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Originally Posted by IntegrityHndywrk View Post
NOW it's done...
My wife has wondered what you meant by "getter done".
Now she understands.

Yup, it's 100%now.
It's a plank and a 3D helicopter rolled into one, but unlike the planks, wind doesn't bother it on take off and landing, you just power through it...because you can.
I would hope the manufactures would sit up and notice.
Skids are great....
But with todays FBL units with the SK720BE in particular, the addition of wheels opens up a lot of options.
I did have a manufacturer of a FBL unit contact me and say years ago I would never have had this work, feed back would have torn it apart.
Since those days nobody has really tried it and now we can see the stability of the newer gyros and programing.
We have to remember also they put gyro units in airplanes to and they have no other option but to taxi and they don't go crazy. I know its a lot different with helicopter FBL gyro control but the principle is still there.
I can't say that the tricycle gear is unstable even though looking at them, you would think so.
I have never had a near roll over on grass or black top and even my botched auto rotation stayed upright even though I broke a leg. (on the ship)
In the case of the G770 the wheel are lighter than the skids including the steerable nose wheel assembly.
The tail servo has no problem driving both nose wheel and tail blade pitch at the same time.
The interaction between main rotor pitch and the addition of tail blade pitch is not noticed on the ground because the control movements are so small.
Its a keeper.
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Old Today, 10:08 AM
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United States, FL, Palm Coast
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Originally Posted by A VIKING View Post
My wife has wondered what you meant by "getter done".
Now she understands.

Yup, it's 100%now.
It's a plank and a 3D helicopter rolled into one, but unlike the planks, wind doesn't bother it on take off and landing, you just power through it...because you can.
Yeah, i was mostly meaning you need to go out and test and fly it. But it was also a "throwback" to Larry the cable guy,who I'm sure is easily forgotten these days.
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Old Today, 03:16 PM
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Originally Posted by IntegrityHndywrk View Post
Yeah, i was mostly meaning you need to go out and test and fly it. But it was also a "throwback" to Larry the cable guy,who I'm sure is easily forgotten these days.
How could anyone forget Larry the cable guy, he's a riot.
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Old Today, 05:14 PM
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mhills51's Avatar
kansas city
Joined Feb 2007
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Congrads! "Now that's funny right there"
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Old Today, 07:20 PM
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Video of Nose Gear.

Here is a short video of testing. No flight video yet, weather was bad tonight.
Goblin 770 Tricycle Gear and Steerable Nose Wheel (1 min 7 sec)
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Old Today, 07:25 PM
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jombo's Avatar
United States, CT, Trumbull
Joined Dec 2007
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So your saying not everyone has one of his doo rags
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