goodmorning gents,

i have noticed a small decrease in thrust (K80E) during my last 3 flights and i relate this to the high temp iam flying, i wait until 6pm to fly but still temp is about 33-35c or 90-95F, it take me longer to take off and loops are not that easy anymore. are there any parameters that i should change on ecu for this? thanks, Nicos

No leave it alone.

ok thanks.

Hotter the air, the less dense the air. You loose performance and lift as air gets thinner. Not an engine issue, it is completely normal occurrence.

exactly this Todd , yesterday....full power for go around, slow response, loss of lift,landed the f16 thinking it was a harrier!! last flight for me until end of august....105F tomorrow!!
happy holidays everybody and thanks for your help, i did enjoy my faultless kingtech k80E this year, 34 flights 5 happy hours in total 6 months.

Nicos

Good to hear that Nicos, "5 happy hours" and many many more to come, rest easy till it cools!

Barry

How's the spool-up time on the K-80? It's either going to be this engine or a Rabbit - which a buddy that has one says it spools up very quickly - to replace my P-70.

Thanks,
Randy

k-80 super turbine, starts really fast..spool time is great.

You wll be very happy with the K80. I have about 10 hours on mine. Contact Barry at www.kingtechusa.com
He has also started full service here in the US. There is no need to send out of the country for service if it would be needed.

Joe Lewis
Kingtech
K80 and K140 Owner

<div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; padding-top: 0px; padding-right: 0px; padding-bottom: 0px; padding-left: 0px; background-image: initial; background-attachment: initial; background-origin: initial; background-clip: initial; background-color: rgb(255, 255, 255); font-family: Arial; font-size: 12px; ">from 1/4-1/3 power about 2-3 seconds....  from idle its like all other turbines...  takes forever </div>

hey guys

finally got my k80f up n running today, smooth sailing except i do get a 30cm flame out the exhaust during ramp up.
Now i brought it new but it came with a flightworks pump, do i need to set the paramaters the same as reported earlier in this thread for the flightworks pump, how many of them are specific to only the gas start version.

any input would be greatly appeciated.
great job kingtech.<br type="_moz" />

yup. you need to revise parameters for the FW pump...  your pump start setting is to high probably.  Reduce it to 6 if using the FW pump

sorry Rush which setting do you mean, there are two that sound similar.
the auto + 2 one or the fuel ramp one??

thanks mate<br type="_moz" />

<div>If i recall: </div><div>
</div><div>Pump Start Point Auto +4 <div>Pump Start Ramp: 6 (as a start)...  if you havnt changed your ecu settings this is probably at 13 and is what is causing the 30ft flames at the start  </div><div>
</div></div>

i gave those settings a whirl, start ramp was already 7. dropped it to 6 and adjusted the start point auto to 4 with similar result. i also tried dropping the start ramp to 2 with a improved result but slower start. still a 10-15cm flame. i did fire her up while still warm 70°c, so im not sure if tha will give me false readings..

it is very cool here about 13-14°c so does that make a difference?

it looks great blowing excess kero out the back but ill be mounting my boom (modelbau tornado) soon and i want to keep flames to a minimal, however i am of the understanding that a pipe will be required.

am i dreaming that i can reduce the flame to almost nothing or is it a fact of life with turbines and isnt much of a problem for models with exhausts etc.

thanks guys, sorry typing on tablet and its a pain in the a**

The following settings should provide clean, flame free starts with the flightworks 200 pump.

Start Parameters with the Flightworks pump should be:

Pump Start Point: Auto +4
Pump Start Ramp: 013
Glow: 32 (good start point)
Gas: 50%(good start point)
Starter Power @ Ignition: 065
Ignition Max RPM: 4K
Ignition Min RPM: 2K
Preheat: 2.0s
RPM Gas off: 15K
Starter Power @ Preheat: 070
RPM 100% Starter Power: 25K
RPM Starter Off: 28K
RPM Reconnect: 25K
Start Mode: Auto-Gas

These settings should solve your ramp issues.
Todd

Are these settings valid for kero start?

I'm going to voice some concerns here.

I do not understand why we need to fuss around with so many ECU settings just to get this thing started. To this point, I have been relying on the factory settings.
To be fair and up front, I am the third owner, and the ECU said it had 52 mins on the engine. I was told only the factory has run it. It is possible one of the owners screwed with a setting or two.

My K-80 s/n 351 with flightworks pump, seems to run just fine for the 8 runs I've done so far. But it is terrible on start-up.

However, after reading this thread I have seen no setting on mine that is way off, but there is no way any of us can tell what's correct out of all the well meaning suggestions on this thread.
Frankly, the manual is of little use.

With the number of user changeable settings in these ECUs, there should be start setting tables based on temp and DA, or pressure altitude, with corresponding settings that work. Tables for PowerMax should be adjusted or different than for green bottle. But the factory should already know this data.

Powermax is a known entity. There should not be this much guesswork. Why does my P-60 start up each time, everytime, the same way using the same temperature Powermax? Even my 10 year old technology RAM 500 starts better. Same Powermax.

In my opinion, it is inapproriate to require the average user to fiddle with an ECU this much just to get an otherwise good engine running. There isn't that much temperature and altitude difference to justify this for most of us.

Again, as I've said I've had no problems in flight so far, just starting. I've been around jets long enough to be beyond accepting flames or hung starts through no fault of my own using factory provided gear.

Cheers,
Chris

Because it's a JetCat?

Ausfester...   i dont get any flames out of my unit with the settings i gave you but i';m on a F platform so that might be it.  To date, all i did was mount the turbine onto my falcon and its been a clean and consistent start all the time....  i love the power the new K80 units are putting out as it will put a 20lb plane vertical from take off in 90-100 deg F ambient temp.  <div>
</div><div>We did try one unit on a pump start at a higher setting and we had flames coming out the back of it as well before we bought the pump start ramp setting down to 6... that was an older k80e on the FW pump and it no longer shoots out flames once it starts up.  </div><div>
</div><div>If i understand it correctly, the pump start ramp number controls the fuel feed during start up and the higher the number, the more chances you will have unburnt kero at the initial stage.  As an after thought, in the start parameter settings for gas, you might want to reduce the start gas parameter (Todd indicates 50) as the flames just might be from the start gas instead of the kero.  </div><div>
</div><div>Hope the above helps!  </div><div>
</div><div>You;ll sort it out...  i think you'll be very happy with the engine performance! Great value for money! </div><div>
</div><div>
</div>

Cool, ill report back if i get a chance after work tonight to fire her up.
Hands down, awesome turbine and great value for money.
The temps are ok when it flames up during ramp so its not a big deal just need to protect my rear boom.

Ausfester Have you tried a higher voltage battery like Barry suggests using. Look in this thread a page or 2 back. A start tube is easy and cheap to make and will prevent any damge to your tail during the hottest start.

thanks for your help guys.
I'm running a turnigy 2c 5000mah pack and got more than 7 starts of a single charge without fail. Total run time would have been less than 10minuites, not sure how much batt is consumed during runtime.
I think the battery usage didnt exceed 1000mah for all the starts..

am i being silly thinking i could do a full day of flying 5+ starts on a single lipo?

That is a simple answer....there are big differences between engines and manufacturers.....I have even found that two engines from the same vendor can behave differently......Just saying JetCat is the reason is not the whole picture.

Eg. I have a JJ1400...starts and runs every time.....but no power house and it runs without changing any parameters.....most of the time. I also have a MW-54, the original design, it specs are tighter and it produces more power....but I sometimes need to fiddle with parameters......precision and power from the same basic design means you need tighter controls on fuel......hence you adjust the parameters to meet the situation.

DW_Crash

Gas start would be no problem to fly all weekend on a charge. I have 2 K-80E gas start and both will use around 200 mah per flight. Kero start will use more battery closer to 450/500 mah per flight. Still think with the kero start would be good idea to use the higher voltage ecu battery that barry reccomends.