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Video of rubber powered helicopters in flight. (Read 1076 times)
Reply #12 - May 31st, 2017 at 10:18pm

Ray_K   Offline
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5-31-2017

Ok, here we have a brief lift off, a hop, but this was not even at 1/4 power yet, only 300 winds, more to come but she got off the ground woo who!!!  Smiley

https://youtu.be/A7ef86svkBk

Cheers, Ray K.  Cheesy
 
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Reply #11 - May 3rd, 2017 at 5:42pm

Ray_K   Offline
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5-3-2017

Ok, here is the power test with main rotors on, looks very unstable and wobbly, I will have to go with a ridged rotor system on this one, it will only take a day or two to redo the rotor head no biggie, here's the video.

Cheers, Ray K.     https://youtu.be/cdo6nW1eDNs
 
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Reply #10 - Apr 24th, 2017 at 9:37pm

Sky9pilot   Offline
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If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #9 - Apr 19th, 2017 at 4:31pm

Ray_K   Offline
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4-19-2017

Thanks Bob and Tom,

I told you she was big, biggest I have built yet.

Bob, a lot of my engineering is by trial and error and after 48 years of trial and error it gets easier so don't worry, one day you will want to build one and I will have all the engineering already done for you, you just have to build it.  Wink

Cheers, Ray K.
 
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Reply #8 - Apr 18th, 2017 at 9:11pm

bigrip74   Offline
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What did l do this time!
Austin, Texas

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Ray, that was really cool Smiley. Now if you could teach me to produce the engineered stuff  Wink
 

IF IT AINT BROKE DONT FIX IT!
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Reply #7 - Apr 18th, 2017 at 8:56pm

Sky9pilot   Offline
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Outstanding Ray,
I knew she was big but now I know she's really big.  Sounds like you're going to have good power available.  Well done, thanks for sharing!
Tom
 

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #6 - Apr 18th, 2017 at 5:39pm

Ray_K   Offline
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4-18-2017

Ok, here is the power test video of the Bell, everything looks good.  Smiley

Cheers, Ray K.  https://youtu.be/4ZdQGQZQeNQ
 
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Reply #5 - Mar 3rd, 2017 at 12:09am

Sky9pilot   Offline
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Here you go Ray... I loved the video and think you might have seen quite a flight if she'd been outside.  But my models seem to find the "Plane Eating Trees or Fences"  quite frequently!  Shocked Embarrassed Cry Cheesy Wink
Hope to see more of these heli videos!!! Cool
We'll change the board picture to one of your birds in flight when we get one of those!
Tom
« Last Edit: Mar 3rd, 2017 at 11:29am by Sky9pilot »  

If God is your Co-pilot...switch seats...
Your attitude will determine your altitude!- John Maxwell
And ye shall know the truth, and the truth shall set you free. Jn 8:32
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Reply #4 - Feb 28th, 2017 at 10:05pm

Ray_K   Offline
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2-28-2017

To prevent this in a free flight model you have to get the model off the ground quickly, not giving the model the chance to tip over, I have had models tip over due to being under powered. FYI. Also wider landing gear helps stabilize the model before lift off, I never build scale landing gear to help prevent tip overs. Wink

Cheers, Ray K.
 
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Reply #3 - Feb 28th, 2017 at 9:24pm

bigrip74   Offline
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IAN, I found a video of what you are speaking of and it explains the dynamic much better than I could even think of. So I learned something.

https://www.youtube.com/watch?v=-9GW8OShclc


Bob
 

IF IT AINT BROKE DONT FIX IT!
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Reply #2 - Feb 28th, 2017 at 9:16pm

pb_guy   Offline
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Youbou, BC, Vancouver Island

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"lay on their side and beat themselves to death" is a great description of "dynamic rollover" and is guaranteed to happen if some amateur tries to steal a chopper. See: Dynamic Rollover
  Unfortunately, I have no idea how to prevent it in a free flight model, except perhaps for hand launches.
ian
 
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Reply #1 - Feb 28th, 2017 at 8:51pm

bigrip74   Offline
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Austin, Texas

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At least yours got off of the ground Smiley, mine just lay down side ways and beat itself to death. Thanks for the video Ray.

Bob
 

IF IT AINT BROKE DONT FIX IT!
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Feb 28th, 2017 at 6:57pm

Ray_K   Offline
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2-28-2017

Here is a video of my Vintage Aero co-axle rubber powered helicopter, I should have flown it outside because it was totaled in the crash but it was stable until it hit the TV but still I learned much from that short flight.  Shocked

Cheers, Ray K.  https://www.youtube.com/watch?v=Ja8ZNnncGrg
 
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