Considering a 516

[sawacs]

I have decided to sell my N7 kit and 105 HZR and instead pick up a 516 and wanted to ask a few questions.

My style of flying is in the lower head speeds and longer flight times area.  If I were to go with a 516, what pinion and tail pully would you recommend?  The head speed goal is somewhere around the 1700 and a little higher range.

I plan on using MKS 9767's for the cyclic and a MKS 980 on the tail and was wondering if spacers will be required?

Lastly, is there a way to stretch the 516 to something slightly larger?

Thanks!

[Wolf51]

The 516 is a great heli, I have 80 flights on mine.

Gearing to achieve your desired headspeed will depend on the kv of the motor you use.
The kit comes standard with 18T pinion and optional 16, 17, 19 and 21T are available.
Standard tail pulley is 20T with optional 18 and 22T.

The mks 9767 and 980 are a straight fit in the 516.

This page will help with information about the 516. https://synergyrchelicopters.com/models/synergy-516/


There is no stretch option for the 516 at present, though there may be something in the works.

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[Rodney Kirstine]

Gary Wright is the real expert here on lower head speed, long flight times. I think the model that's really more suited to that is a stretched E5 but, again, I'm not the expert.

[gwright]

I'm not an "expert", but I do fly mostly lower headspeeds, and have two E5's (stretched to 600 and 700), and a 516. on the 516 i'm using a hacker 1100kv motor, (A40-10L 8-pole) and the 16 tooth pinion.  on 6s/5000 (I use venom packs in this heli, their 6s/5000 are equivalent weight to the 4000~4500's most people use).  It maxes out about 2150 and I have it setup for 2100 and 1700 flight modes. +16/-16 on the pitch was original setup but i'm sure I've tweaked that so dunno the final number. motor is light, batteries light, so I have the carbon tailboom on it to get CG correct.  With the lower rpms and high pitch, the tail is usually an issue on most machines and i like it very solid so I've sped up the tail with a pulley from stock drive products.  synergy offers a speedup tail to 5.0 ratio, but I'm at  6.0 ratio. the way i fly, that holds at 1700, even with full stick sideways loops, but just barely.   the normal 5.0 plus longer  tailblades may also work but I haven't tried that.   i generally get 10 minutes at 1700 and 7 minutes at 2100. Matt flew it and got a few seconds over 7 minutes at 2100 also. That is flying till telemetry says 4000mah is used from the 5000mah pack.  Caleb Turner flew it at the Birmingham event and was really digging the 1700 setup so he flew at that rpm the entire pack, much smoother and more controlled than I, and went 12 minutes.  i wish I had a slightly lower kv motor, like 1000, but don't. could probably get another 3 or 4% of efficiency in the total setup.

[earlybird0513]

I have two 516’s. It’s my first heli kit and I’m completely satisfied with it. Both are identical with the recommended electronics from the synergy web site. I will stretch one when the option comes available. I use the pulse 4500 6s batteries and vbar


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[sawacs]

Thank you everyone for the replies and information.