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AlignRC Thunder Power RC
TailKiller

Senior Heliman

Panama City, FL

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I am still using the Roban swash that came in the kit. However I plan to change to the century swash [cn117B]. The Roban uses larger balls and ball links on the swash and lower linkage assembly. And I am not sure that they can be used on the century swash yet so I'm holding off for know cause i don't want to have to change out all the links

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-20-2016 02:56 PM
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getsuyoubi

Heliman

Queens, NY - USA

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I can't find a swash with that part number. Heli-World has this one, part number CN1107-3, but it's definitely not 120 degrees:
http://www.heli-world.com/3-blade-s...d-cn1107-3.html

07-20-2016 03:02 PM
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Copter Doctor

rrProfessor

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

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this one from century is made for 120 degree swash and 3, 4, or 5 bladed heads. its for 12 mm shafts but you can make an adaptor for a 10mm shaft. For the time being, its in stock.
http://www.heli-world.com/3-4-5-bla...te-cn1117b.html

drive a rotary, fly a rotorcraft

07-20-2016 03:13 PM
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TailKiller

Senior Heliman

Panama City, FL

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Well.. It handles well at 1425 rpm.. the esc is running at 85% and the temp was 155.0f max per the logger download. That's with a small fan on the esc heat sink. It is also very hot outside today. Still needs more air flow..
Averaged 25.0 Amps and 1030 Watts Max 35A 1520W.. This is my first big heli and I'm told it should average about 50w per pound. I'm sure it weighs 20 pounds but I will check to make sure. Since it's the first big heli.. I don't know what to expect or look for.

As for the high collective pitch range I needed to hover it was in part due to head speed and bigger part a bonehead move on my part in the setup... Oh well, not the first time..

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-20-2016 08:37 PM
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TailKiller

Senior Heliman

Panama City, FL

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Update.
This heli is heavy and you can feel it when it's flying. It came in at 20 pounds according to a cheap set of floor scales. I had to knock off some weight.
I removed the sound sysytem which I was using for 2 reasons.. One was for the sound effects naturally, the other was for CG since I have the batteries in their designated location under the mechs. Since I wanted the sound system in the heli, I never checked to see if the flight packs would fit anywhere else. Thank you Emile..
The bats will fit in the belly under the cabin with no issues except that area of the fuse is thin and would need re enforcing which would add weight.
So I cut out the recess wall in the back of the cabin so I can slide the flight packs and RX pack forward to get the CG. I also removed the rear seats. I don't know what I'll do about them but, for the moment.. gone.
Including the things I'm added it should be around 16.5 pound.

Air flow is also a big issue for the motor. Pod and boom and it's ok after a 8 minute flight. 6 minutes flight in the fuse and it gets hotter then I want it to.
So I've cut out the wall at the front intake scoop which is right at the motor and cut out the blocked exhaust port so air will flow. I have also added a 25 mm fan mounted at the exhaust port and have two 40 mm fans coming tmr. Since I already have 2 holes drilled where the speakers were, It may be a good place for the fans to draw in cooler outside air.

Oh well.. I'll get pics up tmr night.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-28-2016 03:02 AM
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Copter Doctor

rrProfessor

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

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Yeah these things build very heavy, I know when done mine will be a flying tank as well but since weight adds stability it may be a good thing. I had already removed the wood from the intake and I too will have the exhaust hole opened up for additional air flow.
looking forward to your update on tomorow's flights.

drive a rotary, fly a rotorcraft

07-28-2016 03:52 AM
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TailKiller

Senior Heliman

Panama City, FL

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A long day of pondering and scratching booty. I first wanted to get a close CG by working on battery placement. Let me say that the specs for this heli say flying weight is 7200 grams or 15.8 pounds. Maybe with 4500 mah packs and no RX battery. I'm using 4500's and a 11.1v RX pack... I could use a 7.4 but with lights and 3 cooling fans I'll stick with the 11.1v. But it's now closer to 17 pounds.

So I placed the packs in the belly under the cockpit with the RX pack back at the mechs. Needless to say it was way nose heavy. And with the bats in their designated place it was very tail heavy even with the RX pack in the nose. I found the spot with the bats 3" forward from where they are suppose to be. And with the RX pack up front under the Instrument panel it roughly balance. I'll fine tune by moving the RX pack until it's balanced

Now.. I'm using a Scorpion 4530 520kv and an 80HV esc, nothing special. I'm using the gearing that came with the kit which gives a 13.8:1 as the specs say.. actually it is 13.67:1 but what ta hey. Point is.. it gets hot inside the fuse and the esc and motor let you know it too. So I had a Castle esc cooling fan and decided to cut out the exhaust port and place the fan there. I also bought 2 more 40mm fans and thought I would place them in the openings where I had the sound system speakers... You can see them there in a pic above.. But quickly saw that with the batteries final home that the air would not move as I thought. So I decided to place one fan on the esc and place the other fan in the intake scoop at the front and would blow directly onto the motor. It should be cooler in there now.

I forgot to download the photos of the inside of the cabin with the bats in place and 2 back seats and the exhaust fan. I'll get them up later.
I sent my TX off to Spektrum for a tune up so there will be no flight for a week or so.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-29-2016 03:50 AM
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TailKiller

Senior Heliman

Panama City, FL

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Couple more pics.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-29-2016 04:22 AM
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TailKiller

Senior Heliman

Panama City, FL

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Oh.. now the reason I'm doing all this again after already having a flying model is cause it was just to heavy. I also beefed up the landing gear supports and added a bead of epoxy everywhere I could in the wood work. I know that adds weight but it's only going to take one hard landing to have bad damage. Auto rotate.. LMAO!! IMHO.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-29-2016 05:03 AM
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Copter Doctor

rrProfessor

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

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i don't know that mine gets very hot but it isn't heavy yet. My mentor Darrell has always told me that if all esc settings and motor is right for the application, you shouldn't need fans to have operating temps within acceptable limits. Easy for him to say, his machines are usually so large. theres enough air space to keep things cool anyway
I try to attach a cooling fan to the motors whenever I can.

drive a rotary, fly a rotorcraft

07-29-2016 05:26 AM
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TailKiller

Senior Heliman

Panama City, FL

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Yeah... The esc is not so much the worry cause it is running at a good enough percentage to keep itself cool. But the motor is surrounded on 3 sides by fiberglass and 1 by mechs. It gets no air flow. It's not so hot that it is over specs rated. But the lower shaft and belt pulley are getting hotter then I want. It will eventually burn my finger and when the motor stops turning then the belt is sitting on a hot spot. This was not an issue while pod and boom.. only after boxing it into the fuse.
As for the esc it was ok at 1250 rpm while pod and boom.. 155 degrees was max temp even running lower persentage. But as soon as it went in the fuse it jumped to 191.0 degrees. Since I had to raise the rpm due to weight to 1450 it open up the esc and it's down around 160 degrees... which is ok but everything has the chance to get hot enough to cause damage while its in the fuse. It needs all the help it can get.
If the esc burns up or the motor bearing goes out in flight then it's for sure the fuse is trash. I guess I dwell on this more then most people but most of the time if I ask someone what their esc and motor temps are... they have no idea. I find that strange...

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-29-2016 09:17 AM
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Copter Doctor

rrProfessor

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

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Oh yea, understandably so. Fuses make a big diff on temps. Oh j am one of those people, no idea what temps, head speed or pitch settings I'm running most of the times lol

drive a rotary, fly a rotorcraft

07-29-2016 06:58 PM
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TailKiller

Senior Heliman

Panama City, FL

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Well here it is... The final zero bubble balanced configuration..
With cockpit finished but no rear seats. Only flight packs and RX battery.
It's the only way it will balance with out adding about 2 more pounds if the flight packs are in the designed place.
The heli is right at 17 pounds. So I managed to shave off a couple of pounds... Should help a lot to ease strain on the mechs and cooler temps.
It's not real pretty but it is functional..

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

07-31-2016 03:20 AM
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Copter Doctor

rrProfessor

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

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That looks good Dennis, let us know if the changes make a difference in the air

drive a rotary, fly a rotorcraft

07-31-2016 06:16 AM
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TailKiller

Senior Heliman

Panama City, FL

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I still haven't got it airborne yet. I weather has been really bad. Rain every day. I hear 12+ inches in the last two weeks. I have this nagging feeling that my motors are running to hot on this heli.. I have always felt that way with this one.
I did a static 5 minute run at -2. Thats all I have for negative pitch. Anyway, naturally it was cooler then a full load flight test... But the shaft and pinion were hotter then I think it should be 145 / 150 is not hot for these motors but it is a good gauge to know how hot it is. At 145 / 150 degrees you can not hold your hand or finger on the motor or shaft without pain. This also means that the belt is stopped on a hot spot and reach the same temp.... I don't think the belt will hold up to long if it gets that hot..
So I tore it all apart agagin and pulled the motor bears. They were still free wheeling but had discolored races and the shaft was slightly discolored. As Jeff Foxworthy would say 'There's your sign"
So I bit the bullet and bought some Boca Bearing ceramic bearings. This motor is a HK 4525 520kv.. They should be here this weekend. I'll put it all back togather and run another static test.

By the way the fans worked great. When I shut down i could feel the heat blowing out the exhaust and after a short time the motor was cool enough to hold. So hopefully the bearings will be the icing on the cake for motor temps.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

08-13-2016 02:20 AM
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Copter Doctor

rrProfessor

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

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I haven't messed with mine in a while as I have been at ircha last week. I did however get back on it since the nats is just around the corner lol!!
yeah this rain all the time every day has got to go lol!

drive a rotary, fly a rotorcraft

08-13-2016 03:46 AM
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TailKiller

Senior Heliman

Panama City, FL

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I have had some strange things happen while flying, but I think this one is the most amazingly lucky crashing save that I have ever had much less seen.

We got no photos if it happening, we were in pure panic mode. I was at the end of the first flight after the weight reduction modification and telemetry module install for monitoring voltage and motor temp.

Everything went fine. I was happy with the flight and the telemetry worked great. As I was landing and was at about 4 feet, the tail rotor stuck in a nose left position. Not a very fast spin cause I have low travel limits set in the tail but fast enough to flip it if it touched down. I had high grass and weeds about ten feet in front of me so I tried to get the heli over to it in hopes of slowing the spin as I try to land, but my timing was off and the heli started coming back toward the pavilion and lighting poles. I had to raise the collective and climb above them. After that the heli was headed for the road with tall pine trees and a lake beyond the trees. I had to put it down and I knew it was going to be bad.

About 8 feet before the road we have a low fence made of 3 foot high 4x4's and a 1/2" cable running through the center. Well.. somehow I managed to completely by accident bring the heli down on the wire.. and the spin locked the landing gear sideways on the wire with the belly of the heli sitting on the wire.

I managed to keep the heli balance and level on the wire and ran over and grabed that big tail fin and then hit the throttle hold and kept it on the wire until Richard could get a hand on it. unbelievable!!!

It twisted the landing skids pretty good and a little belly rash but other then that there was no damage. I should have played the lottery. My drawings aren't great but you get the idea.

http://pcrcheliclub.com/
700 Astar Super Scale T-600 Bell 206 Trex 600 Naza H DX8

09-08-2016 04:18 PM
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getsuyoubi

Heliman

Queens, NY - USA

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Holy ****!
What was the root cause of the tail getting stuck?

09-08-2016 05:31 PM
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Copter Doctor

rrProfessor

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

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Hey I told you to play the lottery that day lol!

drive a rotary, fly a rotorcraft

09-08-2016 06:13 PM
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old nitroman

Senior Heliman

Naples florida

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Thank the heli gods

E5s and E7se, Roban bell 222 800 superscale,450 bell 4 bladed head,gobby 380,180cfx

09-08-2016 06:30 PM
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