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Jeti DS-12

Old 02-13-2021, 05:44 PM
  #476  
CARS II
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I thought I did, well here they are.




Last edited by CARS II; 02-13-2021 at 07:21 PM.
Old 02-14-2021, 10:14 AM
  #477  
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Originally Posted by CARS II View Post
We maiden my friend's T1 this passed weekend and this what we saw when we were performing the vibration checks, the picture shows the most significant vibration out of all 3 axis, it looks like this is the spot where the receiver picks up the most vibration and at around 90 to 100% throttle.
Hello,
300Hz is equivalent to 18,000 RPM, I'm not sure what RPM is full throttle, but it's not uncommon to see some kind of sub harmonic less than 1X rotational speed. However, you should see some strong 1X signal in the spectrum.

Ultrasound is 20K hz or roughly 1,200,000 RPM. Ultrasound and vibration are the same thing, same spectrum, different realm. Any signatures that high in frequency will be very low amplitude. I have a hard time believing it could interfere with a flight stabilization hardware. But I do not know flight stabilization hardware....

FWIW
RP
Old 02-14-2021, 01:58 PM
  #478  
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Originally Posted by RickP View Post
Hello,
300Hz is equivalent to 18,000 RPM, I'm not sure what RPM is full throttle, but it's not uncommon to see some kind of sub harmonic less than 1X rotational speed. However, you should see some strong 1X signal in the spectrum.

Ultrasound is 20K hz or roughly 1,200,000 RPM. Ultrasound and vibration are the same thing, same spectrum, different realm. Any signatures that high in frequency will be very low amplitude. I have a hard time believing it could interfere with a flight stabilization hardware. But I do not know flight stabilization hardware....

FWIW
RP
The noise of a jet engine has nothing to do with mechanical vibration of the engine so you cannot simply try to equate rpm to Hz. The noise is made by oscillations in the airflows. Have you never heard the very high pitch screeching of air at the front of a jet engine?
Old 02-14-2021, 04:05 PM
  #479  
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If noise didn’t cause vibration your ears couldn’t work
Old 02-15-2021, 11:01 AM
  #480  
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Originally Posted by HarryC View Post
The noise of a jet engine has nothing to do with mechanical vibration of the engine so you cannot simply try to equate rpm to Hz. The noise is made by oscillations in the airflows. Have you never heard the very high pitch screeching of air at the front of a jet engine?
I didn't say anything about noise. The post was about the vibration spectrum. And yes, Hz can be converted to RPM.

RP
Old 02-15-2021, 02:25 PM
  #481  
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Originally Posted by RickP View Post
I didn't say anything about noise. The post was about the vibration spectrum. And yes, Hz can be converted to RPM.

RP
The whole issue has been about noise, not mechanical vibration in the low frequencies shown in the Assist vib analyser which is aimed at airframe vibration in the frequencies caused by piston engines. Perhaps you have not read the thread, all along it has been about ultrasonic acoustic interference of MEMS gyros. The noise is caused by the airflow, not the movement of engine parts.
Old 02-23-2021, 07:11 AM
  #482  
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Jeti USA Press Release!!!

We would like to announce that February 23, 2021 the Federal Communication Commission and Industry Canada, Granted Equipment Authorization (FCC), and Certificate of Acceptance (IC) to Jeti USA (Esprit Model Inc.) for the Jeti Rsat 900NG 900MHz Receiver!!!


All USA orders will go out in next day or two, unfortunately Canada will have to wait till next week.

Please do not forget to Update your Transmitter and Rsat 900NG Receiver once you get it.

Zb/Esprit

https://www.espritmodel.com/jeti-dup...-ds-16-g2.aspx

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Old 03-01-2021, 10:33 AM
  #483  
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Designed specifically for the Jeti DS-12 radio. Your transmitter is securely held with included fasteners (requires drilling) or double side pre-cut tape. Powder coated, stainless steel holder simply bolts to jeti transmitter brackets. Folding brackets with transmitter holder easily fit into soft or aluminum transportation case.

https://www.espritmodel.com/jeti-tra...der-ds-12.aspx

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Old 03-01-2021, 11:23 AM
  #484  
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ZB, will this work with my existing DC-24?
RP
PS that is the RSat 900NG
Old 03-02-2021, 05:37 AM
  #485  
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Originally Posted by RickP View Post
ZB, will this work with my existing DC-24?
RP
PS that is the RSat 900NG
The NG900 only works with the DS12 and DC/DS16 II
Old 06-09-2021, 05:02 PM
  #486  
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I'm reposting the steps I use to build a program for a jet, it can also be a guide to build programs for prop airplanes, I'm doing that at the moment for my 30cc Citabria.

This list is a guide, you can modify it to your needs, these steps are directed to the new Jeti users to give them an idea where to start, to reinforce your knowledge, watch Harry's videos ( we all have ) my transmitter is a DS12.
​​​

Hope this helps


New model
Basic properties
Bind receiver
Calibrate receiver
Add funtions ( steer, brakes, smoke, Gyro OFF, Gyro Gain, Gyro FL Mode )

Funtions menu
Remove flap switch
Assign P3 to steer
Assign SC to Gear
Assign SD to brakes
Assign SB to smoke
Assign P6 to Gyro OFF
Assign trim Tr6 to Gyro Gain
Assign SA to Gyro Mode

Dual rates/expo
Assign SF to Ail, Elev
Assign SC to Steer for 0% travel in up position

Digital trim
Remove trim from Rudd
X trim controls
Assign P7 to Tr6
Tr6 mode to "S"
Throttle to -100% steps (jet)
Assign center to Elev
Assign thro-Low to Throttle
Elev, Ail mode to "S"

FL Modes
Add 3 FL Modes
Name: cruise, TO, Land
Slow to 1.5 sec
Asign SA to TO, Land


Flaps
Batterfly/Crow
Asign Log Max control
Mode to "S"

Servo set up
Adjust Ail via Ail Differential
Adjust Elev via Ailevator

Assist set up
Dampening only for all FL M
Gyro off on steering
Throttle to fail safe -125%

Last edited by CARS II; 06-09-2021 at 05:07 PM.
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