shaddin digaflo-l
 

anybody have a shaddin digaflow-l and have an indication on one engine go to zero, if so was it software or an mechanical malfunction. if mechanical what was it? shaddin is taking thier time responding and i'm assuming someone may have experienced the same problems, if i would appreciate any suggestions.
1973 p337
thank you rick

fuel flow indicator
 

Rick

Could be defective sending unit, or it coud be some dirt foulded it up.

Suggest swapping sensor leads to unit then you know if it is the sensor or the unit.

My opinion it is the sensor at fault! Most of the circuit in the Shadin handles both inputs except for the pulse count (digital) from the sensor.

Most likely a dirty connector or poor connection causing the problem.

Is it intermittent or has it completely failed ?

Bob

I'LL TRY SWAPING LEADS. FRONT ENG WINDOW STAYS COMPLETELY BANKS. THANK YOU RICK

solved
 

the cannon type plug locking tabs were not locked back down and nine months of flying after the new avonics package was installed led to the minor vibrations having the plug work loose.
it's very hard and time consuming to try to doubble chech everything after major mods. when someone sticks thier hand into small cramped areas the may distrube something, especially ages and brittle wiring, hoses ect. thanks for all the suggestions
rick

loose connections
 

Rick

You are absolutely correct. Big hands do no go together with skymasters. I have had numerous problems after work has been done in the avionics bay.

As a matter of interest, if you have a KCS-525 compass system or a flux gate compass and the DG becomes intermittent or appears to periodically stick; then check out the small 5 pin connector on top of the flux gate compass out on the port wing.

I spent, literally, thousands of dollars only to find out this connector was prone to corrosion. There is a BETTER connector out now (later version) that has better contact grip.

The avionics shop always seem to leave off the defroster hose on pax side as well as the cooling hoses to the lower portion of the radio stack!

Not surprized it was the connector, they usually are the first to generate problems.

Bob

I had same problem 3 times, in last few months. Rear went blank for 5 min or so and recovered. Happened after new engine installed. Will check the connector.

shaddin finally got back with me and e-mail a trooubble shooting guide plus wiring diagrams. if anyone wishes this info send me your e-mail and i'll attach it back to you(haven't figured out how to do any atchment from this spot.

rick

Rick, my e-mail is rball@goodmanball.com. I fly a 1973 P and a T-337-B 1967 Would like the data

i just emailed webmaster with the (3) pages to post. not real bright at making attachments so i used three mailings (my be better if he post it. if you want me to try, let me know and i'll try emailing you. same type 73p337

The following 3 messages are Rick's 3 files...

First page:

Actually, the board software noticed that two of Rick's files are identical, so there is just this 2nd attachment:

Digiflow calibration / Questions?
 

Has anyone accurately tested the digiflo against usage ?
if so what were the results ?

Has anyone accurately calibrated a Digiflo against a known flow rate?

Does anyone have it connected to their GPS?

Bob

Another page from Rick

And another page from Rick. Total is four now.

Bob: I have used a digiflo in my 73 P337 for 4 years now, and in a Seneca II for 4 years before that. I find them to be extremely accurate, although I have only empirical data to back up my claim. I always keep the tanks full. If I fill the tanks myself, I'm always within .5 gallons per side. If I have somebody else fill up the tanks, I'm usually within 1-2 gallons per side, but I attribute this to differences in what the line guy considers to be full. Sometimes I'm off "over" and sometimes "under". The differences average out to be within my .5 gallons personal usage.

As a double check, I find that the fuel flows presented by the digiflo match almost exactly the book values for a given power setting, temp, and density altitude.

I highly recommend the Shadin system.

Mark