OK...I'll ask the 14S question!

[taosgraveyard]

Interesting thread

While its not available yet, I plan to get a barebones L700. Here is what I am planning

I already have a YGE xxtreme edition 160 HV and a pyro 800-48

17 tooth pinion
Gens ace 4400 mah 7S packs ( listed at 65c)
Same main and tail blades as stock

Max Head speed, 2100, at 2100 there is still a bit more than 80 percent headroom using YGE gov store

FBL unit Hellicommand HC3-SX

Looking at the head speed calc, if the pyro 800 -48 is really 480kv (issue: I have read somewhere that its actually close to 500) then I think there is no need for a 16T pinion ( which is not being offered by Mikado). Comments??

The Headspeed calc says not to go below a certain 2079 RPM due to "voltage and efficiency" . I've not used YGE gov store so var ( I've been using vbar gov, but on this hell I won't be due to the lack of gov in the helicommand unit). Does this mean I should never go below that rpm ( will damage the ESC?) or does it only mean its inefficient so should be avoided

Another question, the manual says top head speed is 2100. I have read that folks are running the L800 at head speeds higher than the mikado stated limit. What is a safe top head speed for a setup like the one I am planning. I still plan to use 2100, but I am wondering about what people are using now on the 12s L700

Comments?

[NTM]

Personally, I wouldn't think twice about going to 2300 rpm on 710mm blades with the logo 700, the head is quite overbuilt.
The yge gov is similar to the kontronik in that it can run lower percentages without issue. I'm going for 2050 rpm with the same setup.

[taosgraveyard]

Agreed 2050 looks good

I'll probably set modes to be 2000, 2050 and 2100

I'm might possibly getting the bundle, selling off motor, vbar and ESC. I am using the helicommand unit on other helicopters after having used vbar for a long time. Have decided to do HC on the logo 700 too,

It will be a while before mikado offers a barebones 700. It was 7 months I think for the 800.

[Stolla]

Originally Posted by NTM

Personally, I wouldn't think twice about going to 2300 rpm on 710mm blades with the logo 700, the head is quite overbuilt.
The yge gov is similar to the kontronik in that it can run lower percentages without issue. I'm going for 2050 rpm with the same setup.

From my own, as well as other testers on the yge freewheel, it doesnt do as well as kontronik, heat being the primary concern, so heatsink a must have if you intend running very low rpm for extended time, in comparison the jive actually runs cooler in freewheel than higher speeds. My fusionhawk with the fan on vbar gov doesnt seem to mind low speeds so a small fan may be all you need, i see the j cooler as a retrofitted possibility. Admittedly the yge sits in cool air with lots of venting so maybe ok

[taosgraveyard]

Yes, I have noticed this, have helis with both YGE and Kontronik, YGE ESCs are mighty nice. Kontronik - unbelievably nice

Was planning to use the 160 HV from my l800, having gone to kosmik 160 on that bird, so has the mikado heat sink.

If the YGE runs too hot, may go to a kosmik 160, but that's more weight. Haven't weighed them both yet.

Since packs are saddle-mounted, there looks to be plenty of room for the gens ace 7s 4400 packs.

[Stolla]

Since couple of you guys use pyro 800, if not rewinded please open your motor and carefully check for wire damage, it seems to be a common problem, it may or may not cause a problem but getter to fix with some hi temp epoxy or send back
https://www.helifreak.com/attachment...7&d=1354813449. Its not glue, they dont use glue.
Also if you hear vibrations or funny sounds from motor open and check mags,some cases of dislodged mags have been documented, im not bad mouthing k i love there stuff, they will surely fix this up better be safe than sorry though

[taosgraveyard]

Will do

Not in my shop now, so cant look at it

Hv
Have not opened a pyro yet , does this motor have any tricks to getting it apart, or is it done like a scorpion.

[Stolla]

Easy just remove circlip. I found a lot of damage to wire internally as well, unseen when assembled, pics in rewinding forum under pyro 800, the kind of damage can cause havoc with esc as it can short inbetween parts on the same wire.

[taosgraveyard]

Originally Posted by Stolla

Easy just remove circlip. I found a lot of damage to wire internally as well, unseen when assembled, pics in rewinding forum under pyro 800, the kind of damage can cause havoc with esc as it can short inbetween parts on the same wire.

Definitely will check it out thanks again

[snemi00]

Mine just arrived along with Kosmic 200 for my 770 build. I'll take it apart this weekend. After reading the posts, I'm thinking I should have stayed away. Hopefully it works out.

[ElectricSheep]

Well if having dinged-up wires isn't enough for those of us with Pyro 800s, Kontronik released this news item today:

Lose Magnete bei PYRO 800/850
Leider gibt es einige wenige PYRO800/850 Motoren, bei denen beim automatischen Verklebungsprozess möglicherweise zu wenig Klebstoff eingefüllt wurde. Bei den PYRO 850 Motoren kann dies nur Motoren betreffen, die einen Heli aufgelasert haben, bei den PYRO 800 Motoren läßt sich die Baureihe optisch nicht unterscheiden.
Sollten Sie unsicher sein können Sie ihren Motor gerne zur kostenlosen Überprüfung zu uns einschicken. Wir danken für Ihr Verständnis.

From Google Translate:
Loose magnets at PYRO 800/850
Unfortunately, there are a few PYRO800/850 engines which was the automatic bonding process may be too little adhesive filled. In the PYRO 850 engines may be involved only engines who lasered a helicopter in the PYRO 800 motors can the series do not differ visually. If you are unsure you can send your engine happy to free check to us. We appreciate your understanding.

Regarding the Pyro 850s, I believe that Kontronik is saying that 850s that are affected are only those that are designated as helicopter versions, with a helicopter laser-etched on the motor.

[NTM]

The germans aren't acting very german lately.
The varnish on the wire in my pyro looks like a beaver was gnawing on it.

[ElectricSheep]

Originally Posted by NTM

The germans aren't acting very german lately.
The varnish on the wire in my pyro looks like a beaver was gnawing on it.

They're definitely not acting German lately... One of my Pyro 800s had the same problem (beaver attack).

BTW, here's a message that Kontronik USA posted in another thread, for US customers.

@NTM, I'm not sure if this applies to you guys in Canada. You might want to contact Charles Anderson.

Note: Kontronik USA must receive your motor(s) by December 21!

Originally Posted by KONTRONIK USA

To our customers:

Although the sample size of motors with this potential magnet issue is quite small, we would like to make the return of your motors as painless as we can. In order to do this, we would like to have motors shipped to our address in the US, and then we will send them as a group to Germany for inspection. After the motors are inspected, the motors as a group will be returned to the US, and they will then be shipped out individually to each owner.

If you would like to have your PYRO 800 inspected, please ship to the following address:

KONTRONIK USA
2288 Gunbarrel Road
Suite 154-382
Chattanooga, TN 37421

Please include your purchase receipt, full name, and return shipping address inside your package. Please ship your motor via a trackable insured method. Your motor must be received by December 21, as the group of motors will then be sent to German for inspection. We hope this date will give you time to send your motor in, but not stretch the delay too long for those of you eager to fly. If you have any questions please feel free to email me at charles.anderson@kontronik.com

Sincerely,

Charles Anderson
KONTRONIK USA

[OICU812]

It applies the same Gerry yes.

[stocksy27]

So has anyone tried the 4525-520 on 14s yet?

[Stolla]

Kv too high for 14 s

[stocksy27]

i got these numbers using stock motor and pinion with a kosmik, are these too high?

Throttle 60%: 1740
Throttle 65%: 1885
Throttle 70%: 2030
Throttle 75%: 2175
Throttle 80%: 2320
Throttle 85%: 2465
Throttle 90%: 2610

[Stolla]

Off course u can run it but it won't be an optimized system. Also 4525 really not the best option for 14s rather something like 4530 at least, a motor is most when run as close as possible to max rpm then geared for enough headroom. If you run low heaspeed in a flightmode for slow 3d it doesn't really matter as you're not after max power. With the 4525 you're better off leaving it 12s

[stocksy27]

You say not rated to 14s but scorpion says max RPM 24,000 PYRO 850 max RPM 25,000 yet these are for 14s? I spoke to scorpion they said keep below 24k and will be ok, so if i run 14s will the motor will be spinning closer to 24,000? Just looking for the most efficient options i know mikado recommend 12s but that is so people who have 700e machines can share packs, if they said 14s less people would buy it maybe i dont know?

[Stolla]

Well I didn't say not rated for 14s I said kv too fast for l 700 there are not enough pinion Options to my knowledge
Pyro 850 much lower kv. The max rpm Is a guideline only and more for bearing longevity than anything else also its a small motor better suited for 12s as to get kv low enough for 14 s it needs more windings, since space is limited the only solution would be higher pole count to lower kv and then your yge won't work anymore as its switching frequency limited to 132000 on 2 pole