Canadian Man

My Feedback: (1)

HAHA! Totally! Need to stuff in a 200 at that altitude!

BarracudaHockey

My Feedback: (11)

Bigger is always better eh? (said in my best but horrible Canadian accent)

yeahbaby

My Feedback: (21)

Like super troopers 2 horrible? Eh

CRX Turbines

Hi Tone,

This is a pretty simplistic chart that shows the degradation of thrust with altitude. This is not manufacturer specific. The simplest way to interpret this is to look at at notation in KPa. 3500 feet was mentioned which equates to ~1080meters. On this chart see highlighted 1000 meters and you will see 90.7% performance. Calculate loss at other altitudes the same way.

Andy

AEROSHELDON

My Feedback: (99)

Holy cow I am at 80% power or so, and on a hot day with density altitude it gets really bad.

CRX Turbines

There are other factors such as temperature and humidity and believe me I have taken two identical turbines side by side and gotten different measurements. This is just not an exact science. But yes your motor will behave differently in Denver versus at sea level.

F900

My Feedback: (2)

I don't think its as bad as we might think, Yes, well I'm well aware it does play a huge factor, I flew my L-39 with ACEx 80 and I've noticed no day and night difference in terms of performance, between Denver and FL, I flew Josh's L-39 with same turbine in 98F+ temps, midday, smoke all around from forest fires and its a little sluggish but not marginal, but my view is if a 120 works at sea level, for us in Denver best to get a 140 sized turbine.

sidgates

My Feedback: (2)

I fly at Denver (5700ft) I have measured static thrust at approx. 18% lower than advertised thrust.

hotspot 01

I’ve noticed higher speed with the ultra flash in cool air airframe efficiency and engine performance gains all add up.

powerjets

My Feedback: (1)

question, how do you manage to set your max rpm at 160K ?
mine is limited to 155 K
thanks

Maddmaxx1

The early Swiwin 80 was set to 160,000.

powerjets

My Feedback: (1)

Wow, that's a big difference of 5000 rpm at the top end.
anybody know how to program this ?

Skunkwrks

Probable governed the ECU for rpm.

powerjets

My Feedback: (1)

Same engine, same ECU.

Skunkwrks

Same country origin built on different days, remember who builds them.......!!!!!!

powerjets

My Feedback: (1)

....?? Please explain

CRX Turbines

Not quite

powerjets

My Feedback: (1)

Ah, ok, thanks for your reply Andy

CRX Turbines

We modified the output on the earlier 80s. The 60 and 80 wheels are similar. The 80 wheel is 1.5mm larger than the 60 with the same profile. We knew that 5k would yield 85 output but the factory did not want us to push it. So we stopped offering it. There is nothing that the end user can do to increase the max RPM, only to lower it. .

Andy

Canadian Man

My Feedback: (1)

Swiwin 140 Testrun and review.

Ceeray

One day I ran into an interesting problem with sw120b. All worked fine until engine did not recognize throttle. I swapped cables and tried everything until I contacted CRX turbines via whatsapp. Well, easy fix. Set Jeti system from auto pulse widht ( or frame rate..) to 16ms ( 15ms only selectable rex3 assist) and problem gone.

now I am wondering why its like this? Good servos need fast frame rate to get everything out of them and now you have to reduce your system speed to keep engine ecu hanging along..

Skunkwrks

That's an interesting issue with the Jeti servo frame rate. In Harry Curzon video , he talks about leaving it at auto setting or like you did select a frame rate.

Skunkwrks

Harry doesn't cover the frame rate for the servos in his video it's not in this one, my bad. Ooops

CRX Turbines

Ceeray, Others have told me 11ms is the magic number. 16 will definitely enable you to connect Jeti with the Swiwin ECU.

Andy

Zeeb

My Feedback: (41)

Density Altitude is just a fact of aviation life as those of us with full scale licenses will tell you. It can make a huge difference in A/C performance be it full scale or drone or model.

The place where lots of guys like to fly around here, is an old Salt Flats lake bed. It will commonly hit 90 degrees or over in the mid summer. You HAVE to be aware of that as it not only affects engine performance but how well the wings will generate lift. There are just fewer air molecules to work with and that DA can be affected by Barometric Pressure, and Humidity.

Bottom line is that as the DA goes up, you may need to adjust Turbine idle RPM and slow down the ramp speed or they just won't play when it gets high, hot, and wet.