My new design
08-23-2006, 07:51 PM
#26
RE: My new design
I still have two sets of the Areobalsa blades and still have not tried them yet. It is hard for me not to use my own. I know one of my customers raves about them. He says they create a lot of lift and he is freakin crazy about them.
On the new version of my build guide, I will be including many shots of your efforts and especially the landing gear pics if that is OK.
Dave
On the new version of my build guide, I will be including many shots of your efforts and especially the landing gear pics if that is OK.
Dave
08-23-2006, 08:08 PM
#27
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RE: My new design
Hi Dave, It is perfectly fine with me for you to use whatever pics and information you wish concerning my build. As I said before I have construction pics of the build from beginning to end. I am also drawing a plan up for the gear I used as the sketch I used is quite rudimentary in nature. Ben
08-23-2006, 10:20 PM
#28
RE: My new design
Thanks so much! I need to finish my new DAG-1 but an old plane from my past dropped in my lap the other day and I am finishing it up. I hope to be fly my newest one by next weekend....I think we may be having a fun fly. I would like to get it up in the air for everyone.
Dave
Dave
08-31-2006, 07:42 PM
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RE: My new design
Hi guys, Sorry it's took so long but this is the landing gear as promised. If you have any questions just ask. Ben
Dave, the landing gear is constructed from 1/8 music wire for the mains with K&S 1/8, 5/32, 7/32, and 3/16 tube( for the oleo struts) with 1/4 in sq strips acting as attachment points. A piece of .064 aluminum cut to size acts as the central attachment point for the central mains/fuse. All of this was silver soldered together. Oh, the two braces soldered on top of the mains going to the fuse are 3/32 wire with brass fittings screwed into the fuse
08-31-2006, 08:32 PM
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RE: My new design
I haven't completely decided yet, but I think a red fuse with white "canon ball" beginning in front tapering toward the rear. White tail, all of it trimmed in black. Ben
10-01-2006, 08:51 PM
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RE: My new design
Hi Dave,
I haven't gotten it in the air yet. I have been busy with work(read too much). I am still tring to balance the blades also. They spin up nicely, but when they begin slowing down the wobble like crazy. I should be able to get new pics in this week though. Ben
I haven't gotten it in the air yet. I have been busy with work(read too much). I am still tring to balance the blades also. They spin up nicely, but when they begin slowing down the wobble like crazy. I should be able to get new pics in this week though. Ben
10-01-2006, 09:10 PM
#36
RE: My new design
Quick question.....do you have the blades loose? Sometimes if they are loose....they spin up fine but as the rpms drop, the blades can pivot in differnt positions that from the high rpm spin up which makes the wholespinning mass unbalanced when the rpms drop. That is what it sounds like to me. I have my blades pretty snugg. It sounds like your blades are pretty good if they spin up with no vibration. You also have to make sure that the blades are equally spaced apart evenly on the rotor plate when doing a mounted static balance test. Draw a mark at the tip of each rotor (in the center line of the rotor). Then measure blade tip to blade tip and make sure that they are all equal to each other. Then lay the gyro on its side hanging off your work bench. Make sure that rotor plate is 90 degrees to the floor. Let the rotors go.....the lighter blade will be sticking up. Weight the tip of that blade. Keep going like that weighting the tips until the blades stop the (heavy blade down) tendancies.
Dave
Dave
10-22-2006, 05:13 PM
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RE: My new design
Hi guys, Well it's been a little while, but here are some more pics of my gyro. I just have a couple other miscellaneous things to do to her before maiden tomorrow. Dave I'll have some better pics for you tomorrow when the sun's out. It's raining here today. Let me know what you guys think. Ben
10-22-2006, 05:37 PM
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RE: My new design
Thanks Dave, I don't think that the weight is going to be a problem either the landing gear arrangement I have. I put it on the scale as you see it and come up at 3 lbs 10 oz. I think I'm looking at AUW around 4 lbs with fuel on board. I will have more on the specs tomorrow. I don't think I'll have any problem seeing it in the air, do you? Ben
10-22-2006, 06:34 PM
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RE: My new design
Dave I tried the tip weights and they seem to have helped with the wobble problem. I have spun them up in a wind and at flight rpms they have no vibration, but they continue to wobble slightly when coming down to very low rpms. Any more ideas? I realize that I probably can't get them completely vibration free. Ben
10-22-2006, 06:42 PM
#47
RE: My new design
Probably the rotors may be pivoting on the mounting bolt.....during high rpms, the centrifugal force points them out 90 degrees, but as the rotors slow up, one of them might be moving a little which throws off the balance. I would try snugging down the rotors a little to keep them in place.
Dave
Dave
10-22-2006, 06:43 PM
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RE: My new design
Thanks Dave for your kind words. BUT, none of this would be without YOUR design. Thank you!! I think it was a very easy build. I hope this is a successful endeavor as I have never flown an autogyro. I do have heli experience though. Any advice from any one for the first flight? No one around here has seen one of these that often much less any experience flying one. Everyone cross their fingers for me. Tomorrow it will fly or die. Thanks again Dave and everyone else. 
Ben
Ben
10-22-2006, 06:59 PM
#49
RE: My new design
You have two choices....throw it or take off from the ground. I have done it both ways. After I built my first prototype, I tooled around the ground with the gyro just getting the feel of it. Going slow and pulling the head back for autorotation then letting it go into the nuetral position (6 degrees) increasing speed more is how I get the rotors spinning. If it tilts to the left on lift off, the blades are not spinning fast enough....give it a second or two with more speed and it should straighten up and take off. When I was playing with the prototype for the first time....I had no intention of flying that day.....it just happened and rest is history.
Throwing it will be good also. I have never busted it up throwing it. I have busted it up by holding too hard and cracking the framework. I have heavy hands!
LOL!
It is going to be an experince kind of thing. Good luck.....
Dave
Throwing it will be good also. I have never busted it up throwing it. I have busted it up by holding too hard and cracking the framework. I have heavy hands!
LOL!It is going to be an experince kind of thing. Good luck.....
Dave
10-22-2006, 07:10 PM
#50
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RE: My new design
Dave, I have tightened the bolts to the point that they're not moving unless you really force them. I also put the tip weights as you said. It still bothers me though that I can't get them vibration free on the low rpm side. I guess time will tell how detrimental this is to the airframe. I will have plenty of pics thoguh if I am successful in flying this thing. All my flying buddies can't wait to see it in the air. I think they're as excited (if not more so) than me to see this in the air. Thanks again, Ben