Spin99, gearing and governor

[lukedodd]

I have just been tested a spin 99 ESC in my No1 ion with a Neu 1521/1.5.
Seems a nice controller I particularly like the datalogger giving me some useful data.

I have been running a 12s setup swinging a GCT670mm blades with a headspeed of 2300. I had 5 flights with this setup with a CCHV85 and it runs well. Esc very cool and motor 65 degrees C on a hot brisbane day.

Performance is somewhat beathtaking approx 20% more go than my Actro Ion. Cyclic response is amazing its way more agile than my Trex 450.

I would like to try governor mode, what is the advantage considering I use a flat like on the throttle in idle 1 flight mode.

Secondly I have a 54 tooth secondary gear and the standard main gear, how do I calculate the gear ratio

Finally can anyone point me in the direction of some literature on throttle end points. The spin control manual mentions initial end point auto, fix initial point (in ms) , end point, Auto inc end point on from.

Any thoughts, comments or advice appreciated.

[ChrisS]

Wow, 2300? That's cookin'. You should definately dial in the governor and pull back that headspeed a bit...say to something orbital like 1900 or 2000.

With a 54 tooth secondary you are at 21.6:1 ((90/15)*(54/15)) so your maximum speed could be stupid high as you mentioned...

Using governor mode will allow you to take some speed from the beginning of the flight and add it to the end for a more consistent average...highly recommended.

I have no experience with the Spin esc (few do yet) but if it's anything like the Jeti's, the end point settings should work out well with 100/100 on your ATV's and simple flat line curves. Do try the governor function and let us know what you find.

The HV's are getting sorted very well now and if you are still wanting to work with that, drop a line to Clintstone, he is the current GURU on those.

This is good stuff, keep us posted.

Chris

[misskimo]

he he GRUNT GRUNT :lol: :smokin:
FWIW. I highly recomend listen to Chris , it took me about 2 years for his recomendations to really sink in , 1900 is very good on a Ion , Batteries will like it , longer flight , but for the wild hair around my A$ s , 2300 is what idle 2 is for :smokin:
CC controller
the advantage is plan headroom above you lower gov setting , consistent HS .
for some odd reason , my 14mz , 12s razor , my end points on my throttle ATVs are -80 + 82 , gov , flat line seams to be best at around 88%

[lukedodd]

This is good stuff, keep us posted.

Chris

I have done the Jeti Spin ESC's onboard datalogger an injustice. I have found a way to get the data you need from The spin 77/99 ESC's.

As stated in a previous post , governor and flat line throttle curves give inaccurate max amps etc. So what you do is simply when testing blades and packs etc, stay in hover mode and do a full collective/throttle climb-out for 4 seconds.

Land and connect the data box to the esc and obtain the data. You must land after the climbout, if you switch to idle 1 and finish the flight, the data will be overwritten by the rest of the flight.

The onboard Spin ESC data will not give a continuous data readout and connect to a PC as with a flight data recorder such as an Eagle tree datalogger. But if you need an ESC, then this feature is very useful. I was going to purchase a separate datalogger but the Spin ESC has changed my mind. The data I get is enough for me.

I did a test with my 12s setup Ion, Imax 97A at 45V = 4.3kW, thats alot of power, and it certainly shows in the ballistic climbout.

[Clintstone]

Sounds like good stuff....................

[cgbole]

esprit..
http://www.espritmodel.com/index.asp?PageAction=VIEWPROD&ProdID=5339
chuck

[PDC]

Couldnt find much detailed info on this controller. Guess it has a soft start mode for heli´s?

Might be an interesting controller if it works good as the weight is kept low. Did you have some more flights? What is your impressing so far Luke?

http://www.jetimodel.cz/eng/spin_opto_en.html

[lukedodd]

Guess it has a soft start mode for heli´s?

Might be an interesting controller if it works good as the weight is kept low. Did you have some more flights? What is your impressing so far Luke?


I have about 10 flights on the Spin 99 ESC so far, soft start is fine with the Neumotor, haven't tried it with teh Actro motor. Start up in hover mode is smooth, doesn't bite like my H77 has started doing in my Trex600 for some strange reason.

I have noticed some very brief surging with the spin when throttling up at around 50-75% throttle. At full throttle its a smooth as silk. I run a flat line throttle curve and its not a problem. I contacted Jeti, and there is a slight software issue which they will fix by sending me a new ESC. Which is good customer support.

I have started using an 11s setup in my No1 ION heli also. I like Auto Lipo ESC's, my H77 doesn't have this option. I can go 10s, 11s, 12s without having to reprogram the ESC. The CC Esc's also have this , it is a handy feature. I am using 5s and 6s Thunderpower extremes 4600mah. At 12s the heli is ballistic, but as per previous posts may be stressing things too much. At 11s its a great intermediate between 10s and 12s. Seems to get a minutes more flight time at 11s compared to 10s with certainly more power. I suspect the gears will handle the 11s better. But its early days.

So Far happy with the Spin ESC. Runs very cool, and I am liking 11s. Again I need a few more flights in less than 15knots of wind to really assess, but in handles the wind well. A big pull-up into a high chandelle down wind in strong wind certainly tests your heli's power!!

Just to change the subject. How is this, I get a slow start -up on the second flight with my H77, but not the first flight. I wonder if the programming gets corrupted as I have changed settings a few times whilst fine tuning the setup for my Trex600. I have re-programmed several times via the programming box but still get an inconsistent slow start!!!! I usually start-up by flicking into idle 1 then switching off throttle hold- don't do this without a soft start!!! This is the same H77 i reported had a variable start - up and top end rpm when it was in my Ion.

[WillJames]

All my Hacker 77-O H ESC's do the weird slow start thing. On the initial spoolup of a flight, they work great. After an auto, it seems like it takes forever for the headspeed to come all the way back up, like at least 2X as long as the initial soft start. Is this what you are talking about Luke?

[PDC]

Lukedodd!

Thanks for the answer on the spin controller.

Funny you say 11S for the Ion-X, thats exactly the same cell count I came to must be optimum in combination with the NEU 1521, as 12S was too much for the motor at the same time as the 60T secondary gear doesnt work.

10S 3700ma as I use now with a 52T pinion gives good power and a light heli, but only a little over 1800 rpm on the head. With 11S one can get just the headspeed needed at 100% throttle and with the gearings available today.

I might try that soon as well.

[lukedodd]

All my Hacker 77-O H ESC's do the weird slow start thing. On the initial spoolup of a flight, they work great. After an auto, it seems like it takes forever for the headspeed to come all the way back up, like at least 2X as long as the initial soft start. Is this what you are talking about Luke?

Yes this is ,in part, what I have found with the H77. There is variation - day to day and from flight to flight - in the time of spool up to full rpm. Sometimes the ramp-up is at a good rate, other times it is significantly slower, so slow in fact, you wonder if it's ever going to get to full rpm!

However, there are two additional pecularities I have found. The headspeed was always about 100rpm down for the first flight of the day. Subsequent flights were fine, HS noticably higher than occurred with the first flight. This was noted numerous times and was not related to packs etc. These observations where noted when the H77 was in my No.2 Ion.

Since putting the H77 in my Trex600, an additional glitch has been noted. Sometimes the slow start works, and other times it doesn't. I have changed the way I start my Helis. I used to start in idle 1 mode, with the throttle midstick and switch off the throttle hold. The ESC would slowly ramp up to max rpm.

During testing and initial flights with my newly completed Trex600. I was testing things out in hover mode. I noted with some starts I could advance the throttle and it was obvious the slow start was working, as the motor rpm increase was lagging behind the throttle stick advance. Other times there was no lag and I could feel the motor would follow the throttle advance exactly and full rpm was on command. Not good for the gears!

On a different track I just received my new Spin ESC from the factory, replacing the original with a software glitch - Excellent service.