Having a problem setting transmitter throttle settings to ECU. Trim settings don't seem to be getting set properly to ECU. Can't get past EGT light. This is an older airstart turbine. Ser#750059. My manual is for ser#750388F. Here is what manual says.

A. High throttle setup:
1. Turn on transmitter
2. Push and hold "set" button while turning the Rx power ON. Turn on transmitter
The Start box display reads:
Setup throttle
High >xxxx
At this time the "Ign" LED flashes
3. Release the SET button.
4. Move throttle stick and Trim lever to Full throttle'
5. Adjust the ATV(if required) until the "Ign" LED stops.
6. Push the "SET" button to memorize.

B. Low throttle setup'

The start box display reads:
Setup throttle
Low>xxxx
At this time the "EGT" LED is flashing.
1. Move the throttle stick to LOW throttle, High trim.
2. Adjust the ATV (if required) until the "EGT" LED stops.
3. Push the "SET" button to memorize.

C. Idle cutoff setup:
The start box display reads:
Setup throttle
SHUTDN >xxxx
At this time the "CP" LED is flashing
1. With throttle stick to Low throttle,Mid trim
2. Adjust the ATV (if required) until the "EGT" LED stops flashing.
3. Push the "SET" button to memorize.
ECU is now programmed. Turn the Rx power off.
Just can't seem to program right. Maybe I have the wrong manual? Any help would be appreciated. This turbine is new and has never been run.

I think that's not the manual. It's simpler than that.
Do you have the GSU at hand?



Hector

reverse your throttle channel on your transmitter.
if the throttle is not reversed (i.e idle command has a higher pulse width than full throttle), the ECU cant calculate the dynamic range between the two values.

Don't know what you mean GSU? Book calls ECU for the ECU I have says on it "Digital engine control". If that helps. I have it on a test stand in the next room so I can power everything up.

The normal GSU of the 750 has the second button, If I recall right,
says parameters. Will take you to place the trim button midway, that
will be your idle; then says throttle high, so you place the stick in the uppermost
position, and push the button. Throttle low, lower the stick all the way dow and push the
button again. At last, says throttle kill( shut complete), lower the trim all the way down,
and push it again. In mine that completed the cycle for it.
My turbine crashed 2 weeks ago. I still have the GSU. If you want it , I can send it to you.

Hector

The GSU is the ground support unit. A black rcetangular box that
came with it, besides the ecu.

Hector

Thats what I thought GSU. Thats the start box with the switch for the air and propane and the ignition button. If you want to send me the GSU I will take it as I will keep the turbine airstart as it is lighter. Thanks will try what everyone suggests.

Here are some pics of the turbine on the test stand,GSU and ECU. Only set button and leds on ECU. GSU has switch for air,propane and ignition button. No parameter button. Turbine is going inside a Century Jet F-105F Thunderchief. Posting build pics on RCU. Kit came with carbon fiber bypass but not going to use because it puts turbine too far back.

the parameter button is an Autostart RAM thing. With the airstart, you do all the programming with the SET button on the actual ECU

Based on the serial # you listed, your engine was one of the first Rams that required
a separate oil tank, pressurized from the compressor port, or "T" to the line going
to the ECU. The F desination came when Ram modified the fuel rail and mixed
the fuel and oil. To teach the ECU, first set your ATV's (end point adjustment)
to 100 up and 100 down. Turn transmitter on, push and hold the set button on
the ECU while turning power to the reciever. The GSU will say set throttle HIGH.
Move throttle stick full up, and trim lever full up. Look at value displayed on
GSU (should be 1900-2000 this is the pulse width), if 1000 or less, reverse throttle
channell, then push set button on ECU. GSU will say, set throttle low. Move
throttle to bottom, and check GSU value, should be 1100 - 1000, push set button.
GSU will say, set throttle shutoff, move trim to full down and push set button.
Value must be below 1000 for ECU to set (adjust ATV if needed), GSU will
indicate throttle low, and at this time the ignition but will now act as a primer
button for the fuel pump. This same button is used to decrease your idle
after the engine is started. Hope this helps.

Johnny

I thought it was an auto start. My mistake. As Johnny stated, that's one of the first
RAMs produced. Everything is done as he says..
You can send me your address to my email, and gladly I'll send it to you.


Hector

Many thanks for all the help. If I can will send video of test run. The turbine did indeed come with a separate oil tank. Has been T off from ECU. Using Exxon 2380 turbine oil I bought at local airport. So since turbine has it's own oil tank should I mix the oil with the fuel? Heard Ram made an uprated version that put out 20-22lbs of thrust. How do you tell what version that I have? Will resume sending pics of F-105F build soon so keep eyes out for it.

If you have a separate oil system you have a very early RAM750. I don't even think they were designated with a letter afterwards, I know there was then a 750F and a 750P producing I believe 18lbs and 20lbs respectively. There was a 750+ as well. It's been a long time since I had RAM's so I don't remember for sure.
Your engine will produce between 15 and 17lbs. I don't think the thrust values were all that consistent in the early RAM's, I've heard many people state between 15 and 17lbs. I had 750F's and they were 17 and 18lb engines.
Very poor thrust to weight ratio compared to today's engines, especially when you are dealing with a completely separate oil system, but, they were a fantastic engine back in the day, I cut my teeth on them. I just wish I had all the money that I spent on Ram's and repairing Ram's to buy todays engines with LOL!!!!!!

Mine was a 750+, and it had approx. 22lbs. thrust. Very reliable turbine in its days when
it came out.



Hector

I saw Carlos replace the short tail cone and install the long cone bringing the power up from 16# to about 22# of thrust. Also putting a (T) festo connector between the oil and fuel line and get rid of oil pump.

Talked to Carlos many times. He never said to increase output of turbine to change thrust. Carlos is a hell of a nice guy. But y'all, and don't look bad cause I said y'all cause yes I use to live in Dallas. This is my first turbine. Got to admit, a turbine this old and brand new still in the sealed bags for $800.00 bucks was not a bad call or trade. Traded a brand new still in the original box BVM Aggressor II kit with the BVM carbon fiber retracts and struts was not a bad deal. From what I hear and see this is a quality turbine back in the day and maybe in today. Just where maybe we all started in our first turbines. I didn't do half bad. In regards to the F-105 Century I know the jury is out. Bad,good who knows. That is up for debate. Can't say anything at this time. Long story. Very long how I got the kit. I can't say at this time as I am waiting. Long time builder of kits. But when I get the go ahead this one is going to make or break someone. Did lots of engineering changes. So any things you may or may not have heard maybe I can put away all those myths. Stay with me on this one, trust me, you will want to stay up with it. This plane will be bad or..