Page Index Toggle Pages: [1] 2 3 ... 13 Send TopicPrint
Very Hot Topic (More than 25 Replies) Bell UH-1N rubber powered helicopter build. (Read 38011 times)
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #192 - Jun 2nd, 2017 at 3:55pm
Print Post  
6-2-2017

Thanks Bob, still work to do but I am close, I might need to down size the models a little bit and KISS, maybe more towards semi-scale simplified. More to come.  Wink

Cheers, Ray K.
  
Back to top
 
IP Logged
 
bigrip74
Administrator
*****
Offline


What did l do this time!

Posts: 6484
Location: Austin, Texas
Joined: Jan 14th, 2013
Re: Bell UH-1N rubber powered helicopter build.
Reply #191 - Jun 1st, 2017 at 9:35pm
Print Post  
WOW! Smiley all I can think of is the engineering you've put in this heli. Nice job.

Bob
  

IF IT AINT BROKE DONT FIX IT!
Back to top
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #190 - Jun 1st, 2017 at 4:02pm
Print Post  
6-1-2017

Maybe rubber powered helicopters are not meant to be this big, at least geared ones anyway. I went for another flight test, put 500 winds in her and the transmission slipped, under lower torque, no problem, under higher torque the gearing slips, no damage to the gearing so it is just slipping, the miter gear box held up just fine.
I will have to look into gearing that have deeper teeth to prevent slippage. Back to the drawing board.  Tongue I will post a video of this as soon as I can.

Cheers, Ray K.
  
Back to top
 
IP Logged
 
staubkorb
5 Star Member
*****
Offline


Stick & Tissue

Posts: 1344
Location: Germany
Joined: Oct 22nd, 2008
Re: Bell UH-1N rubber powered helicopter build.
Reply #189 - Jun 1st, 2017 at 6:46am
Print Post  
Looks really encouraging, Ray! Smiley
You might want to add some kind of a tail skid to protect the tail rotor...

Pete
  

WWWoFF
Wonderful Wacky World of Free Flight
(with a bit of rc thrown in for giggles)

Comparing Spammers to a pile of organic waste is an insult to the organic waste!
Back to top
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #188 - May 31st, 2017 at 9:21pm
Print Post  
5-31-2017

Here's the video, more to come.

Cheers, Ray K.

https://youtu.be/A7ef86svkBk

  
Back to top
 
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #187 - May 31st, 2017 at 8:25pm
Print Post  
5-31-2017

Hi Tom,

This was a very brief lift off but oh man was it neat, a hop not a flight yet but more winds tomorrow and she will be in flight then. My helicopters always land with power still in them so no auto-rotation needed.  Wink

Cheers, Ray K.
  
Back to top
 
IP Logged
 
Sky9pilot
Administrator
*****
Offline


Stick & Tissue

Posts: 11920
Location: Kelso, WA 98626 USA
Joined: Jan 9th, 2010
Re: Bell UH-1N rubber powered helicopter build.
Reply #186 - May 31st, 2017 at 4:47pm
Print Post  
Fantastic Ray Smiley

I assume that once the rubber motor runs down she just auto rotates to a landing?  Never seen a real rubber powered Free Flight helicopter flight!
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
Back to top
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #185 - May 31st, 2017 at 3:12pm
Print Post  
5-31-2017

We have lift off, during another power test, double loop of 3/16" rubber 1 and a 1/4 peg to hook and only 300 hundred winds and she lifted off the counter and I caught it, needs more balancing and there's some clicking noise coming from the pinion gear or spur gear, not sure which, will do another more daring test tomorrow I will down load this video as soon as I can but it fly's!  Cheesy

Cheers, Ray K.
  
Back to top
 
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #184 - May 7th, 2017 at 3:22pm
Print Post  
5-7-2017

Here's the ridged rotor hub, no lead lag hinges and no feathering pin, the fly bar is there just for looks and is not functional. I will do another low power test to see what happens next.

Cheers, Ray K.
  

( 71 KB | 25 Downloads )
Bell_X.jpg
Back to top
 
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #183 - Apr 26th, 2017 at 2:55pm
Print Post  
4-26-2017

Thanks Tom, I did not think of that, I will have to check them out.

Cheers, Ray K.
  
Back to top
 
IP Logged
 
Sky9pilot
Administrator
*****
Offline


Stick & Tissue

Posts: 11920
Location: Kelso, WA 98626 USA
Joined: Jan 9th, 2010
Re: Bell UH-1N rubber powered helicopter build.
Reply #182 - Apr 26th, 2017 at 12:13am
Print Post  
Ray,
You might want to find some "Dental Rubber Bands"  They're the kind used for braces and they keep the tension well and are pretty durable.  Usually can be found in the Drug Store or the Drugstore section of Walmart and other chain stores.
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
Back to top
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #181 - Apr 25th, 2017 at 3:20pm
Print Post  
4-25-2017

PB you were right those loom bands deteriorate very rapidly, I had both tension cords just fall apart and break while the model was just sitting there, these will not do, I will have to find a suitable replacement for these, we can not have these falling apart during operation.  Wink

Cheers, Ray K.
  
Back to top
 
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #180 - Apr 24th, 2017 at 5:36pm
Print Post  
4-24-2017

Thanks Tom, I hope so.

Cheers, Ray K.
  
Back to top
 
IP Logged
 
Sky9pilot
Administrator
*****
Offline


Stick & Tissue

Posts: 11920
Location: Kelso, WA 98626 USA
Joined: Jan 9th, 2010
Re: Bell UH-1N rubber powered helicopter build.
Reply #179 - Apr 24th, 2017 at 3:52pm
Print Post  
She's outstanding Ray...she has to fly well looking as good as she does!
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
Back to top
IP Logged
 
Ray_K
5 Star Member
*****
Offline


to create that which never
exsisted before.

Posts: 518
Joined: Feb 15th, 2016
Re: Bell UH-1N rubber powered helicopter build.
Reply #178 - Apr 24th, 2017 at 3:34pm
Print Post  
4-24-2017

She is ready to fly, well test anyway, I did not put the glass on yet but we are ready to give her a try, we will see what happens in the next day or two.

Cheers, Ray K.
  

( 81 KB | 35 Downloads )
main_rotors_a.jpg
( 84 KB | 21 Downloads )
Main_rotors_b.jpg
Back to top
 
IP Logged
 
Page Index Toggle Pages: [1] 2 3 ... 13
Send TopicPrint