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Post Info TOPIC: Human Interface Rotor System Helicopter (HIR) yes....way out in left Field


Veteran Member - Level 3

Posts: 317
Date: Apr 1, 2011
Human Interface Rotor System Helicopter (HIR) yes....way out in left Field
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I got the make-shift antenna soldered on, but it did not work. So, ordering a new one. Whoever pulled the wire out really did a number onit, but it will not prevent the first test flight.

 

Dave

 


-- Edited by davh12 on Friday 1st of April 2011 09:03:48 PM



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Date: Apr 17, 2011
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A message from Dave:

Travis,
Hey the internet is down at my apartments because of remodeling, but I'll bring my lap top to work and try to hop on the net at the library if I get a chance.
I got all of the soldering done for the wiring on the helicopter and after changing around the sevro plugs on the mixer/receiver, I got it working again as well. So the electronic stuff is back on line. I got the upper mast bearing mounted and almost done with the lower mast bearing. I hope to do the first tethered flight Easter Sunday. I think that's next week-end. If you want you could post that message for me on the forum. I'm fast tracking now and things should be zipped up soon. Did a power up today and the new tail rotor works almost too well. I accidentally hit the reverse manipulation switch and the helicopter almost jumped off the table from the tail rotor thrust alone. Things are looking up . I miss talking on the forum though. We're picking up a new bunch of cherry lieutenants next week. Take care. God speed.
Dave

 

Felt it was appropriate to post if you are curious of his wherabouts lately.



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Veteran Member - Level 3

Posts: 317
Date: Apr 18, 2011
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Travis,

 

Thanks again.

 

Photos below are the wiring and soldering bit. Tethered flight this week-end..Fingers crossed.

 

Dave



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Date: Apr 18, 2011
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4th center of gravity hang test.

 



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Posts: 317
Date: Apr 18, 2011
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latest airframe configuration / ground tail rotor power up.

 

Dave

 



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Date: Apr 18, 2011
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Alright! I'm waiting with excitement for the first test flight! Good job, Dave!

Linking the vids to the page at the main site too.



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Veteran Member - Level 3

Posts: 317
Date: Apr 19, 2011
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Travis,

 

Thanks. I'm pretty up tight about it, but pushing forward.

 

Dave



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Date: Apr 23, 2011
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Lower mast bearing mounted, mast attached, main drive motor mounted. Picture below, airframe is inverted allowing the glue to dry for the lower bearing housing. Still on track for tethered flight tomorrow.

Dave



-- Edited by davh12 on Saturday 23rd of April 2011 06:26:03 PM

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Posts: 317
Date: Apr 24, 2011
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Ok.............tether flight did not go as well as I had hoped. I had a problem with torsional flex in the vertical struts of the lower airframe causing the airframe as a whole to vibrate, but the biggest problem was that the motor, battery and receiver are up a little too high. When the helicopter gets light on it's frame just before it lifts off the surface, it wants to tip over. So, I at least know what to fix and adjust now. On a better note: the forward and aft tilt work well. I can hold the helicopter with 2 fingers and it will hover on it's "own", but some changes need to be made. In an effort to cut weight, I left out the lateral support struts on the vertical struts. They would have eliminated some of the torsional flex, but we learn from trial and error. Titanium has a bit more "spring flex to it and that also coulc have caused an issue. The video below is after the tether flight. During the tether flight I realized my "skevies" were showing so I left that clip out.....lol. The helicopter would lift up a bit and roll laterally. I have some work to do, but I'm not discouraged. As you can see in this video clip, the mast tilt seems to be ok.

Dave

 



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Posts: 3381
Date: Apr 24, 2011
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Yay! It flew! Sort of...

I'm happy for the first flight, but saddened by the fact it smacked into the wall as you predicted before. Still I see a promising future for the project.

Keep up the good work, Dave. I'm seeing major progress.

Happy Easter!



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Veteran Member - Level 3

Posts: 317
Date: Apr 25, 2011
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Stingray,

 

Thanx.................already changing things around a bit and scratching my head. The battery was laying flat as well the receiver on the original factory airframe. I had thought that using a longer mast would negate that a bit as far as my concerns for the weight being too high. The mast could've been more precision turned........back to getting my lathe. I'm not even close to giving up.

 

Dave



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Date: Apr 26, 2011
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A careful look after I disassembled the airframe showed that the lower mast bearing housing broke loose. All of the power input and centrifugal force was distributed on one bearing. I should've used the carbon fiber pegsto lock it into place with adhesive. I'm still making a few changes.

 

Dave

 

 



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Posts: 317
Date: May 7, 2011
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Ordering a bit of CF. It'll be a few weeks before I get back to you. Sorry folks.

Dave

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Posts: 803
Date: May 10, 2011
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Take your time, Dave! We have not lost hope in your project. Please continue when you can. wink



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Veteran Member - Level 3

Posts: 317
Date: May 15, 2011
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Triple Nickel,

 

Thanks. I have not lost hope either. I wrote a paper on the issues that I need to address and my aproach to correct everything. Ordered the CF from Sierra Composites. Waiting.

Regards,

Dave

http://www.envisionhelicopters.com/HIR_Partial_Summary.pdf

 



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Posts: 317
Date: Jun 5, 2011
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Sorry it's been a while. Week before last I was in the field, went home for the Memorial Day week-end and back to the field this last week. I got most of the changes to the airframe figured out and respective parts cut out of carbon fiber. I'll have a you tube video post, but You tube is slow today. Were it not for the camera, you could see my sexy bald head in the reflection in the sheet of carbon fiber. I was going for the "Ed Harris" look because all of the ladies dig him, but the truth is I'm just bald and happy with my wife...............but the ladies can still dig me if they want to....hehehe....lol.  Good to be back.

 

Regards,

 

David



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Posts: 317
Date: Jun 5, 2011
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Finally...........almost there again. Still need to order a better drive motor. I'll get there.

 

Dave

 



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Date: Jun 5, 2011
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Glad to have you back, Dave! Much thanks for the updates!  wink



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Veteran Member - Level 3

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Date: Jun 12, 2011
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Lower airframe now has a wider foot print for better stability.

 

 

 

 



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Date: Jun 12, 2011
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5th CD is a little heavy forward until I get the rotor system and drive motor mounted.

Dave

 



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Date: Jun 14, 2011
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Promising progress, Dave, and it's getting me excited... and I believe I speak for others who take interest in your project.



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Veteran Member - Level 3

Posts: 317
Date: Jun 14, 2011
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Travis,

Thanks,

I could get more excited myself, but my time allowed for it is never enough. We'll see.

Dave



-- Edited by davh12 on Tuesday 14th of June 2011 10:32:42 PM

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Date: Jun 14, 2011
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I fully agree and understand. By the way, check your other topic on the mystery EC-135.



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Veteran Member - Level 3

Posts: 317
Date: Jun 19, 2011
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battery/receiver assembly mount completed. 2nd servo actuation clip uploaded in a bit. lower motor plate is also mounted (after video clip..sorry) and started the upper bearing/motor mount bracket.

Dave



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Veteran Member - Level 3

Posts: 317
Date: Jun 19, 2011
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2nd Servo acutation, 1st after the changes to the airframes.

 



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Posts: 186
Date: Jun 20, 2011
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With it's sluggish response time and jerkey movement, wouldn't that be problematic before it reaches flight, even teathered? 



-- Edited by Sidewinder on Monday 20th of June 2011 08:26:22 PM

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Veteran Member - Level 3

Posts: 317
Date: Jun 26, 2011
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Sidewinder,

yes it would, but there were a number of issues that came to light as I disassembled the airframe, etc. The mast had high and low surfaces.....my fault for turning the diameters down w/ a crappy drill, the weight was too high and finally, I planned for a slow response to have some sort of control in gradual phases to prevent over correction/too much control input. Torrsional flex contributed to the increasing vibration as well. We'll see what happens. It's only the first of several airframe ideas that I have. I have to have "brain food" for problem solving. It's an addiction in a way.

Regards,

Dave

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Veteran Member - Level 3

Posts: 317
Date: Jun 26, 2011
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lower mast bearing/upper motor mount almost complete. Delta 3 hub almost done.

Dave

 



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Veteran Member - Level 3

Posts: 317
Date: Jun 26, 2011
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hub/blade balance and lower bearing/motor mount.

 

Dave

 

 

 

 



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Posts: 3381
Date: Jun 26, 2011
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Thanks for the updates. Can't wait for a successful flight. Then you can try and develop the concept into a full-scale demonstrator, that would be awsome. biggrin



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