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› Mr. Sugaki's article on RC Technique Feb. 2010
01-12-2010 11:57 PM  8 years agoPost 1
ymuraki

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Tampa, FL

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Here's brief translation in case you guys are interested in.

1. Lubrication on main gear.
Main gear and pinion gears were well lubricated on glow model during flight, but without the lubrication, temperature on main gear exceeds 100deg C, and reduces gear life significantly. Use Teflon grease to solve the problem. He has seen the same problem on gas engine helicopters due to lack of lubrication from exhaust.

2. Brushless motor
Started to develop electric system with in-runner motor with cooling fan. Later, switched to out runner for huge torque. He suspect a lot of heat is generated by inductive magnetism on outer casing. Thicker steel casing reduces heat. His version of new motor runs cooler without cooling fan therefore, more power to the shaft.
He is working on sensor-motor to increase response on hovering.

3. LiPo batteries
Just because the battery has higher capacity does not provide longer flight time: It’s all up to pilot’s ability to manage current. FAI regulation is allowing to 12 cells. We are hoping that will allow us to use smaller, lighter and less expensive packs, but time will tell.

4. ESC
Contest machines draw about 25A on hovering and 90A on during aero. Good/experienced pilot should be able to use 90A rated ESC, but for average pilots or beginners, he recommends 120A or 150A ESC.
Most ESC’s he tested had 8bit CPU’s and processing was too slow to catch up with sticks. They need 16bit processing capacity with enough FETs to handle current. Also make sure to use good power connectors.

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01-13-2010 12:53 AM  8 years agoPost 2
FlaG8r

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Florida

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Who is Mr. Sugakis and what is RC Technique? The info is a little obscure.

Life is tough, it's tougher if you're stupid

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01-13-2010 01:34 AM  8 years agoPost 3
ymuraki

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Tampa, FL

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Mr. Sugaki is F3C international judge and founder of KSJ (K&S.)

RC Technique is THE magazine for radio control publication, and the publisher hosts the largest RC event every year. 50,000 spectators.

Nob

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01-13-2010 01:41 AM  8 years agoPost 4
FlaG8r

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Florida

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Do you mean noob? Never heard of that magazine, which event?

Life is tough, it's tougher if you're stupid

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01-13-2010 02:08 AM  8 years agoPost 5
GM1

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Tallahassee, Florida US

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RC Technique
RC Technique is a MAJOR Japanese magazine with an amazing amount of information. Fortunately for me, Nob subscribes AND can read Japanese so I get to hear all the latest.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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01-13-2010 02:31 AM  8 years agoPost 6
FlaG8r

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Florida

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Oh, that's why I've never heard of it.

Life is tough, it's tougher if you're stupid

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01-13-2010 02:34 AM  8 years agoPost 7
FlaG8r

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Florida

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GM1...in case you were interested you could always put the link into Google Translate and read the website
http://translate.google.com/transla...c-tech.co.jp%2F

Life is tough, it's tougher if you're stupid

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01-13-2010 03:46 AM  8 years agoPost 8
Dr.Ben

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Richmond, VA, USA

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All that gets you is English jibberish that MAY give you a remote understanding of what was in Japanese. No substitute for someone who actually speaks Japanese.

I'm getting some grease this week to use judiciously. I know for a fact it also helps a great deal with gear noise.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-13-2010 04:24 AM  8 years agoPost 9
F1 Rocket

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Melbourne, Florida USA

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I've been using some grease on my TDR gears (it's recommended by Jan) and it does help a lot. I measured an average 10 deg F decrease in pinion gear temp. Only a small amount is needed. The stuff I use is some translucent yellow grease I bought from Min Air 20 or so years ago. I forget what they called it. The lable wore off a long time ago.

Danny

Danny - DemonAero Support Team

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01-13-2010 11:06 AM  8 years agoPost 10
GM1

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Tallahassee, Florida US

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Grease
Danny,
I think they called it synthetic hydrogen grease (whatever that was) and I still have a tube of it also. I am using a clear silicon teflon grease I got from the dive shop for use in regulators. We'll see how it works.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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01-27-2010 08:58 AM  8 years agoPost 11
luixitoyo

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Lausanne - Switzerland

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Could you put a pic of a lubed maingear?
I want to know how much grease should I put.

Thanks

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01-27-2010 01:12 PM  8 years agoPost 12
ymuraki

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Tampa, FL

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luixitoyo,
I believe just need very thin coat of grease. Don't over grease it. Excess grease will fly all over the place and track dirt and messy.

Nob

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01-27-2010 01:14 PM  8 years agoPost 13
Dr.Ben

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Richmond, VA, USA

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My grease is clear, so you couldn't see it in a pic.

I initially put a small (meaning about 3mm "spot") every 1/2 dozen or so teeth about the perimeter of the maingear. Run it a little bit and wipe off the excess from the top and bottom edges of the gear. Reapply every few flying sessions or when you can't see a light film of grease on the teeth of the gear. Any more than a light coat buys you nothing and will only be slung off, making a mess.

I'm using some pure silicone grease for diving suits I had lying around. It's REALLY sticky and is staying on the gear nicely. I think most anything will work fine. Just use something......

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-27-2010 01:14 PM  8 years agoPost 14
luixitoyo

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Lausanne - Switzerland

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Thats what I think. I see on a shop a teflon grease on spray. It will work?

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01-27-2010 06:13 PM  8 years agoPost 15
Dr.Ben

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Richmond, VA, USA

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I've seen that too. No harm in trying it. See how well it has stuck to/stayed on the gear after a few flights.

Ben

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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01-27-2010 11:23 PM  8 years agoPost 16
Ace Dude

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USA

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Any issue with the grease attracting dirt?

  

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01-28-2010 04:42 AM  8 years agoPost 17
Dr.Ben

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Richmond, VA, USA

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No.

These electrics models run a TON cleaner because there's no cooling fan downwash stirring up a bunch of dust everytime you land, and the grass lives because there's no exhaust to kill it. Mine isn't holding any dirt.

Even it it did hold onto any dirt, it just needs to be cleaned. Experience is quickly showing that no grease on the gear is a NO-NO.

Ben

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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