RunRyder RC Helicopter Topic - G10 sideframes

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Gasser Model RC Helicopters > G10 sideframes

FCM
Elite Veteran
Location: Surrey, England

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Not a new idea I know, but thought you may like to see my Benzine Trainer G10 sideframes that I am making now. As far as I am aware, nobody has done this for a Benzine Trainer?

The pics show the standard Trainer sideframes in front of the G10 frames.

Please feel free to comment whether it is positive, negative or downright silly

Paul.

12-19-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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Yeah, they are strange looking things I agree.

I have obviously copied the acrobat tank orientation (for better fuel pick-up) although it is much farther forward. I am not worried about and C of G shift as the fuel is used due to the camera and mount hanging from the gear making any shift negligable.

My intention is to make the frames stressed to carry underslung cam mounts. The only other use for them would be for other underslung payloads or perhaps sports flying but then the standard Benzine frame are good for that anyway.

They will also sport frame mounted 3 point eCCPM with the servo mounted on end which is my prefered swash control.

I will also be using a cut -down Spectra canopy as they are available locally and for some strange reason, seem perfect for my design!

Thanks for the interest Tom.

Paul.

12-20-2005 Over year old.

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revman
Senior Heliman
Location: 4063 Upper Austria

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G 10

where can I get sheets of that material?
Want to try making some modern frams for my gasser that was origaniaaly a Kalt and is getting more and more away from it as I have to adapt parts from other ships.
I live in france so any ideas will be helpful...................... dont really speak french though , Im a Brit living over here.

12-20-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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I used a US internet shopping site as I couldn't find any G10 here. It must be available in France I would have thought and a lot cheaper than having it shipped from the US but here is the URL for the company I used

http://www.polymerplastics.com/composite_g10.shtml

Fast friendly and efficient

Paul.

12-21-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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Just about straight Tom. They may actually lean forward a tad (from the servo arm to the swash ball) but I have yet to finalise the forward swash servo position so really I have quite a bit of leaway.

My current Benzine uses the same set-up and they are not perfectly straight at mid stick as I 'inherited' the side frames but this has never been a problem in use for me when flying AP although I am well aware it is best to have everything straight and aligned correctly for the best cyclic feel.

I will post a pic once I get the servos installed. Any feedback from my pics is really appreciated as I have never made my own sideframes before although I must say, they are looking okay to me so far.

I won't know for sure if my design will work until I have given them a good shakedown with cam mount attached.

Paul.

12-21-2005 Over year old.

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revman
Senior Heliman
Location: 4063 Upper Austria

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fcm

Thanks for the link, what thickness should I use / what are you and bergan using?
Thanks , again started working on ply ones for spacing etc.
Kev

12-21-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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I do not know what Chris uses but my frames are from 3/32" (2.4mm) which is strong but not too heavy.

Post some pics of your G10 frames Kevin - I would like to see how you tackle this.

Paul.

12-21-2005 Over year old.

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revman
Senior Heliman
Location: 4063 Upper Austria

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bergen

was wondering .................. do bergen spray theres black or can you order the stuff that way.......... Where to get 2 mm carbon sheet from?
Are you usint the standard spacers?
kev

12-21-2005 Over year old.

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Chris Bergen
Elite Veteran
Location: location

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I have lots of Rustoleum black paint all over the shop!!

Chris Bergen

12-21-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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Quote
Are you usint the standard spacers?

Yes, bearing blocks and spacers as per standard Vario although I am using more of them on my frames.

Carbon sheet is available on-line from UK - just give it a search - really expensive though.

Paul.

12-22-2005 Over year old.

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AceBird
Elite Veteran
Location: Utica, NY USA

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QUOTE>>

Please feel free to comment whether it is positive, negative or downright silly

END QUOTE>>>>>>>>>>>

The battery tray supports are cantilever beams that have their maximum bending stress located where they attach to the main structure. It would be better to eliminate the hole that reduces the material in that area. If you just moved the hole toward the engine you could still have it without weakening the cantilever beams so much. What was the advantage of making the battery tray supports part of the main side frames? I would think this increases costs because of material waste.

Copy of the Acrobat tank orientation?? Now the fuel pick up tube has to flex 30% more if you fly inverted. Even though Gassers have a pump, being that high above the carb will affect the fuel mixture ratio because of head pressure changes if you fly inverted.

Ace

12-29-2005 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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Sorry so long since my last response - been moving house.

I understand what you are saying re: the battery tray beams Ace, but the G10 allows me to do this as it is really quite strong. The battery, although a pretty large 4000mha nimh 5 cell pack, will hardely put any stress on the sideframes and as this is a non- arobatic cameraship, I think it will be okay. The cut down Spectra canopy will also pick up on the battery beam which really dictated the design.

The fuel tank is now turned on its corner to allow better fule pick up when the heli is upright. This is the same as used on the Acrobat and it makes sense to me for both cameraship and aero helis as the clunk will tend to sit in the angle of the tank's corner instead of sliding around on a flat surface. Must be better for fuel pick up as I'm sure Vario realised on the Acrobat.

Paul.

01-04-2006 Over year old.

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ericslife
Senior Heliman
Location: vancouver b.c. Canada

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Guys I found a local percon who sells carbon fiber and such. It's in canada.
Eric D
http://www.geminicomposites.com/pro...ber_sheets.html

01-08-2006 Over year old.

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heliraptor
Key Veteran
Location: Colchester, Essex, UK

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revman

www.carboncopyuk.com

I've ordered before carbon sheet from them.

Lee

01-08-2006 Over year old.

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TechSpec
Heliman
Location: Finland

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G10 = FR4

G10 is a regular FR-4 material. FR-4 is a common material for printed circuit boards, nearly 90% of all pcb:s are made from this material.
So if you wish to find G10/FR4 material, ask from some pcb manufacturer if they can supply this for you. FR-4 is made from layers glued with epoxy under pressure, but you should know that there are many different materials that those are made from. And my opinion is that G10 is not that strong as carbon fibre, because its made from glass fibres instead of carbon.

01-28-2007 Over year old.

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FCM
Elite Veteran
Location: Surrey, England

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Quote
And my opinion is that G10 is not that strong as carbon fibre, because its made from glass fibres instead of carbon.

I agree but G10 has other properties that in my case, make it a better choice than graphite - non conductive and good vibration damping properties.

In case your interested, I now have two heli running with these sideframes. No issues so far.

Paul.

01-29-2007 Over year old.

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Gasser Model RC Helicopters > G10 sideframes

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