View Full Version : New Rotorhead & Blades for my Twinstarr
05-27-2007, 07:03 PM
After 6 mths of work in my shop( Advanced Rotor Designs )over this winter I finally got my Twinstarr ready for summer flying. I ordered a set of Sportcopter 30 ft blades in Nov. 2006, got them in Jan 2007. I then designed & machine up my own rotorhead with some features that will be easy to maintain. I use a main bearing that can be greased & teeter bearing that can be greased without disasembly of the rotor head. Teeter limiters where added to manage the blades on the ground. I added a little Gadget Green to the towers. I then put everything on the Twinstarr & spun them up the first time yesterday. A couple of high speed taxi tests felt good so on the third pass it was time to find out how it would fly. I`m pleased to say it is smooth & flys hands off without any trim springs. It felt so good I flew for a hour (I had to break it in of course) I`m still flying off my 40 hrs so now I can fly all over within 75 miles of my airport.:whoo:
05-27-2007, 08:15 PM
Looks great, Rick. Does your rotor brake engage automatically when you push the cyclic forward?
Rick at what rpm does the teeter limiters kick out and what material are they made from? Thanks Roy
05-27-2007, 09:42 PM
That machine is SHARP!!!!
05-28-2007, 04:35 AM
I hope 2008 bring me a new set of blades also.
05-28-2007, 07:00 AM
Hey, nice job !
Looks alot like SC's head, but I bet it cost less !
How much would yours cost if someone wanted to buy one from you ?
05-28-2007, 07:29 AM
Tim, Yes the brake engages with full forward stick
Roy, The teeter limiters are made out of ABS plastic & release at 25 RPM
Chris, Although it looks like some others it incorporates some features not currently availible. I will offer thses rotorheads in the near future for a very attractive price (to be anounced) if someone is interested.
05-28-2007, 08:08 AM
I was wondering why we haven't heard much from you on the forum.. you've been busy busy.
05-28-2007, 11:37 AM
Nice pics. I can't see much with those small pics...could you resize 'em to maybe 800 x 600, or maybe resize any future pics. Thanks, Rick.
I like lookin' at your machine.
05-28-2007, 09:50 PM
I put 2 more hour on the Twinstarr today. Sure is nice flying around building time in this machine. I took my camera with me & took atleast 25 shots I thought but when I got back down & checked the camera NOTHING! I was a little upset but had a great flight & will be checking my camera out for BUGS! If I had Stan ( Mr shutter bug) in the back seat I would have it made!
05-29-2007, 11:31 AM
Very nice Rick. I'm glad it's working like you thought. But then again. I've seen your work and I knew it would be a very beautiful machine.
Please let me know if you used your old bearing size or went with the newer small bearing and bolts.
RicK, I'm gona have to come down and check it out! on the 2nd pic...Is that one of them bits that runs the coolant down the center. or are you just manuelly applying it?
05-29-2007, 06:42 PM
Paul, I manuelly applied the coolant on these parts. I wasn`t in a big hurry! Now if I go into production I will crank it up!
05-29-2007, 07:02 PM
WOW! Great job Rick, I love to make the chips fly, Is that a double bearing head? sure looks good,
05-29-2007, 07:13 PM
Scott, The bearing in my rotorhead is not the stacked single place bearings that most use. The bearing I used is a large double ball bearing that can be greased without taking the rotorhead apart.
05-29-2007, 07:38 PM
Do you have a CNC machine for mass production?
05-30-2007, 07:01 AM
Tim, I set up a machine shop many years ago to handle all the stuff I do for my cycle business & pleasure.
06-10-2007, 09:11 PM
I was able to get another hour on the Twinstarr tonight. I flew about 100 miles , burnt a half a tank of fuel. I really like my mixture control to lean the engine out for some fuel savings & keep the plugs clean.
06-11-2007, 06:11 AM
Rick, you comming to Mentone in it?
06-11-2007, 08:10 AM
hello rick, very nice work! That is a beautiful gyro you have. Timchick tells me that you sell an electronic ignition for the MAC72, please email me or post here what you get for them. I would feel much safer with it!
06-11-2007, 07:54 PM
Rick, you comming to Mentone in it?
Brent, I have to fly off my 40 Hrs before I can leave Ohio. I have 13 hrs so far but finding the time to fly for me right now is hard. I would love to fly it to Mentone , we will see if the time comes.
06-12-2007, 04:39 AM
I was told that with a certified engine like the 0320, I would only need 25 hours to fly off?
06-12-2007, 06:04 AM
That is true Brent B. If the data tag is off the engine it is classified EXP.
06-12-2007, 11:57 AM
The 25-hour period requires a certificated engine and prop combination, but...
The 25 and 40 hour times technically are guidelines. I'm not aware of it ever happening, but you could have an experimental machine issued a 25-hour phase 1 test period with a non-certificated engine/prop, or be required to fly off 40 hours even with certificated engine and prop. It's all at the discretion of the DAR or FAA inspector who issues the operating limitations on your airworthiness certificate.
In today's world, I doubt you'd find an inspector who'd stick his neck out to issue an EAB machine a 25-hour test period.
06-12-2007, 04:23 PM
brent Rick is right. mine has so many mods that the placard was removed. but I manage to get 25 hours any way as pahse one. Plus rushing to get to the 25 is not good. I good to go slow and become a part of the machine. learn to heard what she has to say. then after the 25 a good long cross cuntry can be planed.
06-12-2007, 05:23 PM
If your busy just let me know, I'll come up and fly her around the pattern for 3 or 4 hours for ya!! :)
Fly her once a day after work. Don't forget ALL hobbs time counts! That includes time for taxi, run-up, mag-check, spin-down the works!
Do a marathon run! I'll stand on the runway and throw water bottles up to you as you do low passes :P
06-12-2007, 09:36 PM
Tim, How`s your fuel bill this month:boink:
I will try to get some more time logged?
Marathon test piloting is not for me it makes me have to PEE!:sad:
06-15-2007, 07:37 AM
Rick, Once you finish the water, you have an empty bottle...:lol:
08-10-2007, 08:57 AM
Rick heard you have an cdi conversion for the mac engine? is there a way i can phone you? i am new here and am rebuliding a mac 101-1 42318-a 72 hp ? for any help or info i would be very greatful thanks brent
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