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As I get to know the MaxiR and some of the issues with it, I feel that I can add some useful comments.....
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Having noticed some inaccuracies in the milling of the aluminum heads, I recommend that folks balance the entire head with the blades installed. The diameter of the bore for O-rings varies by 0.1 mm or more and I believe that this is enough to make the O-rings compress in a different way on each side, throwing off the centering of the spindle a bit. Here's a couple of pics that show how a bearing (handy measuring gauge) fits loosely into one side, but not the other:
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Purists might take the time to have the bore's diameter and depth milled to the same dimensions on each side. It seems that this issue is a minor one, at least when the stock spindle is used. I've not been able to see any problem in flight, even though I can see a slight difference in the depth of the O-rings, even "by eye". With the 3mm upgrade spindle, the O-rings appear to bulge out more on one side. the factory response will be to make the face of the eyelet shaped pieces a little larger. I am currently using the one in the photos with the stock spindle with no problem. |
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Finally I had a good crash to test the MaxiR's durability! Earlier this summer I was showing off my little Maxir's ability to handle heavy winds very well at a small park flier gathering. Towards the end of the day I was flying some inverted circuits about 5-10 feet off the deck and I got myself in a bit of a predicament with the heli flaring up into a steep bank and then the dumb thumbs started:) It hit at full throttle ... I've never giggled after a bad crash before. Here's the list of damages in US bucks:
Total cost: $15.10! Grass fields are great! Yes, the stock plastic blades are just fine! The flybar wire has a slight, fixable bend in it now, though. Update: I've managed to crash my MaxiR few more times and can testify further that this heli survives horrible looking crashes with minor damage. |
Do you need upgrades for your MaxiR? Not really! There's some nice ones offered, but the stock heli will work just fine. After getting about 10 hours of flight time, I'd installed the freewheel kit, aluminum swash, and ball bearing tail lever. I would heartily recommend the aluminum swash to pilots racking up lots of hours, but that's it. Hard-core 3-D addicts might like making the frame more sturdy with the stiffner that can be installed below the motor and between the landing gear frames. |
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Recently I added the 3-D paddles, CF tail rotor blades and fiberglass main blades along with trying a 20 tooth pinion. Man, there is quite a difference! The heli was very agile and rolled very fast. The headspeed was up around 2700 rom.... Flight time was reduced to 13 minutes though. Care must be taken not to over-heat the motor and loosen off the piinion's grip as the pastic softens.
And even more recently, I'm using the 2208/20 motor with a 15 or 16 tooth pinion. I'm also using the latter with my SE. |
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MaxiR main shafts are not perfect. I can find a bow in most of them, but only the worst ones seem to affect performance. I weed them out of stock in my store as best I can, but the ones I ship are in the "good enough" category. I think I might be a little overly critical here. I've tried a custom built hollow steel shaft, but it was bowed more than the one I removed for the test. |
It might seem odd, but for all theinnacuarcies that can creep into the works, the easiest thing to do is run up the heli and check for vibes. then rotate the head 180 degrees on the main shaft and try again. Sometimes the simplest method appeals to my "just let me fly my toy" approach, hehe. |
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