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01-30-2020 09:10 PM  6 months ago
bwellmaker

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Long Island

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UIH,

Took the cutting wheel to my S-76 today.

The conversion to shaft drive has begun. Looks pretty straight forward so far. Will install IGB and check alignment to the TGB.

B

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01-31-2020 07:38 PM  6 months ago
bwellmaker

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Long Island

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Uih,

The shaft log is roughly fit. This went a lot easier than expected. I have to make a IGB mount but have that figured out and is pretty simple. I do have some clearance issues around the TGB input but nothing major.

Angles are very shallow which is good. There will be a short torque tube housing from the output from the IGB with 1 carrier bearing installed. The forward end is about 32 inches long so will use 3 or 4 carrier bearings.

Some pics

B

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01-31-2020 08:12 PM  6 months ago
Notar

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Taxachussetts

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Butch
How long is the stub shaft going to be which connects the mechanics to the tail boom section?
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01-31-2020 08:28 PM  6 months ago
bwellmaker

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Long Island

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Joe,

Here a pic. I will also support the housing where my finger is.

Thoughts?

B

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01-31-2020 08:35 PM  6 months ago
bwellmaker

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Long Island

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There is no shaft in the torque tube housing yet. The female articulate joint will be sticking out once the shaft is cut to length.

The forward section of the shaft will be about 30 inches long.

B
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01-31-2020 09:17 PM  6 months ago
Phoenix NOTAR

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Tallahassee, Florida USA

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Butch, Take a look at the Vario R22 (7022) manual, page 12. I think you will find it helpful before you cut the torque tube.

Sandy
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01-31-2020 09:17 PM  6 months ago
Notar

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Taxachussetts

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So from your finger to the male coupler?
That will work fine. On the boom end, just pin the bearing holder at the end of where you cut and put a female coupler. Then make up the stub shaft.
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02-01-2020 01:54 PM  6 months ago
bwellmaker

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Long Island

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Oh, I get it now.

There is no stub shaft. The torque tube will be one piece from the articulate joint on the output of the mechanics to the input of the IGB. The IGB uses cruciform claw joints on both input and out put and I will use another articulate joint to the TGB. The entire assembly can be removed as one piece like my 67.

The torque tube housing will end close to where it sits now and will be supported at the bulkhead where my finger is. The IGB will be mounted to the canted bulkhead in the back.

B
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02-01-2020 04:29 PM  6 months ago
DCORSAIR

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Selma, Calif.

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Well now, got my mechanics flying great, nice and smooth, head speed is good, but got a problem, after about 4 minutes of hovering and playing around,the motor will shut down, ESC is a brand new Castle ICE 120 all updated, settings match the motor settings, it is slightly warm at the time of this shut down, motor is very hot (KDE 600G3), tried different timings and PWM settings, doesn't matter, it really only happens when I spool down to 1/4 throttle, then try to spool up again, it will cut out, then spool right back, then cut out again, never had an issue like this, checked the Castle data log, all looks good, but anyway it was going into it's fuselage today but not until I solve this issue, can a motor alone shut down??

D. Lee.....t.Born again.t.....
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02-01-2020 05:12 PM  6 months ago
Phoenix NOTAR

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Tallahassee, Florida USA

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My KDE 700 in my NOTAR runs very hot, but so far no issues with it.

The Castle ESC does not get any feed back from the motor that would shut it down, other then the 3 wire connections. A bad motor wire connection could change from hot to cooler and possible make/break a connection.

Is the Castle making any "beep tone" codes when you land?
Is the "throttle hold" set correctly in the Castle ESC?
Are you in fixed end points, or governor mode, or set rpm mode in the Castle ESC?

Sandy
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02-01-2020 06:24 PM  6 months ago
DCORSAIR

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Selma, Calif.

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I'm running in fixed point right now, did calibration and all that, works great for about 4-5 minutes, no problems, battery is usually around 4.00v per cell or so when it happens, went ahead and disabled cutoff voltage for this next flight just to see what happens, no beeps can be heard when I'm forced to auto, don't see anything about throttle hold settings? it works when I hit TH on my radio, D. Lee.....t.Born again.t.....
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02-01-2020 07:03 PM  6 months ago
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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Try running a 6v (5 cells) nimh/nicd battery for your reciever. i see you are running a 4.8 volt pack. these 2.4G systems are picky about voltage
a 3 cell lipo and a bec that can regulate voltage between 5.5v to 6.0 volts would be the ideal thing to use.
drive a rotary, fly a rotorcraft
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02-01-2020 07:21 PM  6 months ago
DCORSAIR

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Selma, Calif.

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Thank you, I wondered about that, even though I have ran these same 4.8v pks for yrs in my scale helis, all 600 size, but I used analog servos, this time I have the JR 8717 digitals that came in the Trex I got from you CopterDr, so I thought I was going into failsafe or something but the light on the 617 stays green at the time of the shut down.D. Lee.....t.Born again.t.....
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02-01-2020 07:52 PM  6 months ago
Phoenix NOTAR

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Tallahassee, Florida USA

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If you have a Castle Link, and you want to download and save any log files in the ESC, clear the log in the ESC and make a new flight, and send me all of the log files, I can review them for you.
If you PM me I will provide an email address the logs can be sent to.

Why are you not using Governor or Set RPM mode in the ESC?

Sandy
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02-01-2020 09:01 PM  6 months ago
DCORSAIR

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Selma, Calif.

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I just wanted to get it in the air and see how it does, I didn't set it up yet, I actually forgot how to set it up, I switched over to Hacker 110 ESC a few yrs ago but I have since then sold all my 600 scalers, so I have returned to scale helis and I decided to go with the Castle, I had a couple yrs ago but forgot how to set up the Gov mode, thats all, will get it set up if I can solve this voltage issue, just soldered up a CC 10amp seperate BEC, trying that now and got rid of the NiMH 4.8v battery and I don't have a 6v NiMH to try so I went with the CC BEC for this next test, will report back shortly.D. Lee.....t.Born again.t.....
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02-01-2020 09:45 PM  6 months ago
DCORSAIR

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Selma, Calif.

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Here is my report, ran two 6S 5000 60C batteries throught it, no shutdowns or anything, flew well over 5 minutes, pitch pumped a few times, went all the way down to 14% on one lipo just see to what would happen and nothing, so I guess my voltage was just to low with the 4.8v battery as suggested by CopterDr., looks like you nailed it, Thanks guys, only one more thing to change out, looks like I might have a Futaba 9254 tail servo going bad, it's old and would not hold very well and is regulated at 5.1v which I ran all my others at, but it may need 4.8v as recommended, so going to replace that and call it good.

Do you guys set a lipo cut off voltage in the ESC? I would rather waist a lipo than have to auto if I was to hit voltage cutoff for some reason, so I disabled that and the auto lipo choice.
D. Lee.....t.Born again.t.....
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02-01-2020 09:57 PM  6 months ago
Phoenix NOTAR

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Tallahassee, Florida USA

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I use a "soft cut off" at 3.1v /cell. If activated:
Soft Cutoff
When the pack reaches the cut-off voltage, power to the motor is reduced until the pack voltage rises above the cut-off voltage. Power is then continually modulated to maintain the cut-off voltage. The motor will appear to hunt for a set speed, and slowly have less and less power if held at full throttle. This is recommended for helicopters and 3D flying. In either case, a sudden loss of power is unwanted when the cutoff point is reached.

I set the current safety to disabled.

Sandy
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02-01-2020 10:21 PM  6 months ago
DCORSAIR

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Selma, Calif.

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Great, thanks for your help Sandy, just getting back into scale so I kind of forgot some things.D. Lee.....t.Born again.t.....
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02-03-2020 03:20 AM  6 months ago
DLF creations

rrNewbie

Ypsilanti Michigan USA

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💎Sustaining Member
EC-145 4 blade tail rotor
I'm working on a roban 600 size EC-145 I've run into a problem with my tail rotor shaft, the tail rotor assembly requires a 2 mm bolt through the shaft the shaft is so hard I cannot drill through it I've used cobalt and titanium bits fast and slow speed on a drill press I cannot seem to drill through, if any one knows how to accomplish this please share this with me. thanks (see pictures)
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02-03-2020 03:21 AM  6 months ago
DLF creations

rrNewbie

Ypsilanti Michigan USA

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Pictures of EC145 tail assembly

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