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HelicopterScale Model RC Helicopters Docs  Vario Bell 412 electric
10-16-2015 09:15 PM  31 months agoPost 61
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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Looks good! What is Vitroplast? It looks like FG sheet stock...
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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10-16-2015 10:28 PM  31 months agoPost 62
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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Barry

Sats figured it out on the other forum.

"Ah, Phenolic now I know what it is, even used in construction due to its high strength to weight ratio, was used in the aircraft industry in WW2 aircraft like the Lancaster and your B 17 Fortress etc.
Many uses and great stuff to work with.
Most large RC aircraft use Phenolic tube as wing joiners also.

Forgot to add, in the UK it's called Tufnol and readily available on the net :-)

http://www.tufnol.com/sectors/aerospace.aspx";

hope it helps someone here to. We still dod not figure it out under what name it is available in the US...
I got mine from here...

http://www.en.exmega.si/tehnical-laminates.html

gh

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11-01-2015 09:00 PM  31 months agoPost 63
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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OK baby steps again...
I epoxied the wooden formers in the fuselage and stiffened the fuselage with carbon fiber tape. Works wonders...

I cut some access panels in the floor for batteries and other "goodies"... and made the mid point cover for mechanics... they are removable so I can have access to them once the helicopter will be assembled...

gh

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11-01-2015 10:49 PM  31 months agoPost 64
ChopperCrazy

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Sykesville, Pa. USA

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Batterys
Will you have any ventilation for you batteries during flight to keep temps down.

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11-02-2015 03:15 AM  31 months agoPost 65
Mojave

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Palos Verdes, Ca. USA

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Roger that, Phenolic material. We use it in satellites also.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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11-02-2015 07:01 AM  31 months agoPost 66
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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At this point I do not intend to use any additional ventilation means. The formers have holes and I do not foresee the issues with heat... except in the height of summer... then I'll just leave the cover off and fly without it...

I really got into this material... super straight and really light. The only "downside" is that one needs a dremel tool to cut it...

gh

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11-02-2015 09:13 PM  31 months agoPost 67
ssmith512

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Indianapolis, IN USA

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Cool build. I love the Huey ships!

"Vitroplast", known as G-10 here in the States, is awesome stuff.

Steve

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12-29-2015 11:19 AM  29 months agoPost 68
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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Well it has been a while... and I have been learning stuff about mechanical setup... and how to fabricate my own linkages...
Now I'm learning stuff about the clutch. I never used one before and am not sure if this is "normal"... it sure does not look OK to me...

I did a bench test of the mechanics... and when I apply full cyclic the whole head just... stops spinning...

Watch at YouTube

not sure if this is normal or if I'm doing something wrong...

open for suggestions...

gh

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12-29-2015 02:36 PM  29 months agoPost 69
Double E

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Atlanta, GA

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I think the first issue is that your clutch isn't grabbing the bell with enough force. The first thing I would check would be the clutch liner and make sure it isn't worn or if it has something on it that is causing it to slip.

The second issue which may not be that big a deal is that when you get to full throw on your cyclic input your head stops spinning. That tells me there is a little more resistance on the main shaft when you get to full cyclic throw. Ideally there wouldn't be any additional resistance but as long as it's not binding it should be fine.

Your primary issue is that your clutch is slipping so you need to figure out what is causing that issue first. If it's a brand new clutch, you may want to use some acetone or degreaser to make sure the rubber surface of the liner and clutch isn't slick.

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12-29-2015 02:54 PM  29 months agoPost 70
Double E

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Atlanta, GA

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One other thought. Is the clutch spinning in the correct direction? You may need to flip it over or change the motor direction/rotation to make sure that when it spreads it is engaging the bell properly.

It might help to reference a build manual for a nitro heli to see how they assemble and install their clutches.

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12-31-2015 11:04 AM  29 months agoPost 71
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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double E

thank you for the input. I found out last night that I did a rookie mistake and did not secure the clutch to the main shaft of the motor... darn...

So not I have to drill a hole in the main shaft and carve the screw grooves in it so that I might secure the clutch assembly. Vario makes it "simple" for the methanol motors ... but fitting an electric motor is a challenge...

gh

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12-31-2015 11:32 PM  29 months agoPost 72
Double E

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Atlanta, GA

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Not sure what your clutch looks like but maybe you could get away with tapping threads into the clutch and grinding some flat spots on the shaft and using some set screws to secure it rather than drilling a hole through the shaft.

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01-01-2016 11:46 AM  29 months agoPost 73
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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I'm using this clutch from Vario
http://www.vario-helicopter.biz/us1...oth::32118.html

I guess I have to come up with a way to firmly attach it to the 8mm main shaft of the electric motor...

gh

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01-01-2016 12:27 PM  29 months agoPost 74
goodhunting

rrApprentice

Slovenia ... somewhere in Europe

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OK so I'm at this point now...

I have to tap the main shaft to fit a screw on the end... I found out that Trex 500 collet fits the mainshaft and that now I have the bottom fixed. I guess I have to fit all of this items on the mainshaft of the motor but it will be OK...

gh

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01-01-2016 01:11 PM  29 months agoPost 75
ssmith512

rrKey Veteran

Indianapolis, IN USA

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GH,

Dont tap your motor mainshaft. There are adapters available. Here is an example that is available from Joe at eastcoastvario.com here in the states.The large bras piece in the upper left corner is the adapter that is held on the motor shaft via set screws and then you can see it is tapped and threaded at the top for the clutch to bolt to. This is specifically designed as an adapter for gasser mechanics and for electric motors with an 8mm shaft.

Hope this helps and I am not too late!

Steve

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01-01-2016 05:24 PM  29 months agoPost 76
doorman

rrProfessor

Sherwood, Arkansas

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PLUS 1
I have used the conversion kit from ECSH (Joe) on all my Vario units, and also the standard for all of my electrics

Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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01-01-2016 06:21 PM  29 months agoPost 77
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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Unfortunately, he can't use Joe's adapter with that skyfox style clutch. The collet is much smaller on the skyfox clutch than the benzin. Tapping the shaft is required in order to put enough pressure on the shoe/split collet to lock it down. The collet that he has at the base of the motor shaft acts as a stop to give the split collet something to be tightened down against. I had a few spare motor shafts that fit scorpion/hyperion motors that I machined just for the purpose of adapting a clutch. I may be able to dig one out...
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-01-2016 08:16 PM  29 months agoPost 78
doorman

rrProfessor

Sherwood, Arkansas

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Good Catch!!
Good info Barry... did not know it wasn't the Benzine !!! (DAH)
And Happy New Year buddy!!!
Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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HelicopterScale Model RC Helicopters Docs  Vario Bell 412 electric
01-01-2016 11:05 PM  29 months ago •• Post 79 ••
Mojave

rrElite Veteran

Palos Verdes, Ca. USA

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Lol, happy new year to too Stan! Hopefully gonna be able to meet up with you guys at Top Gun, looking forward to it.
Barry

All helis and planes have an expiration date stamped on them...you only find it after you crash!!

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01-01-2016 11:18 PM  29 months agoPost 80
ssmith512

rrKey Veteran

Indianapolis, IN USA

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Oops. My bad. Thanks for the correction Barry. I dont even know what a Benzine is! LOL!!!

Steve

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HelicopterScale Model RC Helicopters Docs  Vario Bell 412 electric
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