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Member postings for John Burrill

Here is a list of all the postings John Burrill has made in our forums. Click on a thread name to jump to the thread.

Thread: Panther Trainer Autogyro
17/04/2019 12:58:14

Thank Rich. I do have the head the correct way, The spindle center line is just about above the roll axis control horn, which seems about right. If I understand correctly, I should add enough nose weight so it hangs level from the C of G point, where I have a hole through the mast. That will make the hang angle about 20 degrees.

16/04/2019 01:02:18

I built the Panther autogyro from plans in the special issue of the magazine published in late 2018. It was an enjoyable build, and I'm happy with the results. However, I have never even seen one fly except in videos, and my attempt at a maiden flight resulted in a quick left roll while on the take-off run. I went back and read the comments on page 5 in this thread, and have an idea now about how to do better. My question relates to c of G as indicated on the plans and "hang angle", and the relationship between them. My Panther hangs at about 15 degrees with the batteries (2 3S 1300mAh in parallel) installed and the blades removed. Suspending it from the C of G shown in the plan near the base of the mast, it hangs tail low. It takes about 5 ounces of weight in the battery compartment to bring it level. Do I need the weight, or should I go with the 15 degree hang angle? BTW I added a very slight right thrust with a washer under the motor mount. Motor is an Eflite Power 32. Any suggestions?

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