Hi, Larry, Max,
Good to hear from you guys.
The 6" 67 mg motor stick is originally part of a lighter 310 mg EZB. Max, if you recall, I had brought it to Lakehurst over Labor Day weekend. As it turned out, I switched the wing and prop from a heavier EZB, so that the total weight increased to 370 mg. That is how it appears in the INAV plan. For a 370 mg EZB, I would also put a little more heft into the motor stick.
Keep in mind that the 30 minute flight at Lakehurst was one of its first flights and not yet trimmed perfect. It's difficult to determine what is its full potential. I believe on a good day at Lakehurst, 33+ is possible. We will see how it flies next summer at the hangar.
I decided on a short motor stick because I thought it would better guard against motor stick bowing and twist, compared to a 7 or 8" stick of similar density and stiffness. At the same time, I can lose a few 10's mg.
So far, I see that my light motor stick, even though it is only 6", is sensitive to the tension and twist of the motor. I have to back off about 150 turns and launch at .08 to .09 in-oz. But this is still a very large amount of torque and more than enough to take the model to the top of Lakehurst and higher.
For me, all of this is part of an ongoing experiment. My newest EZB weighs 310 mg and has a 62 mg 6" motor stick. Again, perhaps the stick is too short and too light. I just don't know and will do my best to experiment and find out.
I know that Larry has written that a longer motor stick is needed for a long cruise. I have the utmost respect for Larry and have learned a lot from his articles. I find it interesting to experiment and try new things, and I will report my findings as I learn them.
Max,
Can you send me a copy of your 320 mg EZB plan? I would love to see it.
Larry,
On your record flight, can you describe the flight profile? Time to climb, maximum altitude, cruise and descent times?
Thank you.
-Kang
Received on Mon Nov 29 2010 - 14:25:55 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET