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Old May 30, 2011, 12:49 PM
Argue for your limitations
ajbaker's Avatar
Lincoln, CA
Joined Oct 2006
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Vibration

Quote:
Originally Posted by Prof100 View Post
Jurgen,

With a flat piece of CNC'd aluminum for a motor mount and two screws holding the motor the clamping forces is sufficient to retain the motor and minimize vibration unless the foam is responding to the signal. On my FC I used the HK mount which matches two mount holes on the 35-36C. It vibrated or buzzed when powered up but the fix was to reinforce with glass cloth and epoxy resin. The vibration stopped. The fault was in fuselage, not the mount.
Clever, very clever. I thought I was just going to have to live with it. I did not know what I was going to do next. Then, up pops the answer. Great tip. I can't wait to do it on mine. BTW-Did you glass the top of the fuse, too?
AJ
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Old May 30, 2011, 12:53 PM
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Prof100's Avatar
Canton, Michigan USA
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Originally Posted by ajbaker View Post
Clever, very clever. I thought I was just going to have to live with it. I did not know what I was going to do next. Then, up pops the answer. Great tip. I can't wait to do it on mine. BTW-Did you glass the top of the fuse, too?
AJ
No, I only Zpoxied the inside. It did enough to retune the foam structure.
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Old May 30, 2011, 12:55 PM
I fly lawn darts with wings.
United States, CA, Turlock
Joined Apr 2011
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I am not a structural engineer, so I will be balancing the prop well, using the sotog mount and hoping for the best.
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Old May 30, 2011, 01:18 PM
Argue for your limitations
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Lincoln, CA
Joined Oct 2006
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Doing things differently.

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Originally Posted by aesmith View Post
I really hope this thread cools down and goes back to sharing of ideas.
The problem here is that there is one person who treats new ideas as if they were birds and gets a shotgun out to blow them away. I am with the other two guys that are defending our right to do things differently without all the negative feedback from one only person. I think that defending the right to do things differently is worth defending. Jergen will jump in and parse many statements so he can inject a negative comment have the last word. For me, putting him and his lemming on ignore makes life much easier. The other two guys are headed that direction too. Intelligence is an asset. Not being able to express it in a constructive manner negates all of it. I think that defending the right to have free thought supersedes all else in any thread.
AJ
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Old May 30, 2011, 01:32 PM
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If you want aluminum re inforcement and have only a handdrill and a Dremel tool - You can still make what you need.
Buy samples from an aluminum supplier -some offer a small packet for a few bucks in the type you need
Then: sandwich a piece (say .050) between two pieces of i/8 scrap plywood - using silicone rubber or any sticky glue like Goop.

using your existing mount, and a piece of sharp piano wire, trace the shape and the hole patterns onto the plywood.
Drill (use new sharp drills ) all the hole n slots, then using a thick Dremel disc (wear glasses!!) cutout final shape
Now, peel off the wood and attach finished plate over existing mount
cheap n not very difficult.
I don't have a CnC setup ,so I do things with hammer n tongs.
File to size n hammer to fit. or hammer to shape and file to fit
whichever works for you.
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Last edited by guy hanson; May 30, 2011 at 01:38 PM.
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Old May 30, 2011, 01:36 PM
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Canton, Michigan USA
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Quote:
Originally Posted by guy hanson View Post
If you want aluminum re inforcement and have only a handdrill and a Dremel tool - You can still make what you need.
Buy samples from an aluminum supplier -some offer a small packet for a few bucks in the type you need
Then: sandwich a piece (say .050) between two pieces of i/8 scrap plywood - using silicone rubber or any sticky glue like Goop.

using your existing mount, and a piece of sharp piano wire, trace the shape and the hole patterns onto the plywood.
Drill (use new sharp drills ) all the hole n slots, then using a thick Dremel disc (wear glasses!!) cutout final shape
Now, peel off the wood and attach finished plate over existing mount
cheap n not very difficult.
Or just buy a SOTOG mount directly from him or from HeadsupRC.


However, sometimes making your own is fun too.
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Old May 30, 2011, 01:40 PM
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Quote:
Originally Posted by Prof100 View Post
Or just buy a SOTOG mount directly from him or from HeadsupRC.


However, sometimes making your own is fun too.
Aw-that ruins half the fun.
How expensive is that piece - shipped ?.
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Old May 30, 2011, 01:41 PM
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Originally Posted by guy hanson View Post
Aw-that ruins half the fun.
True, I find myself doing things myself simply because I want to do so.
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Old May 30, 2011, 01:42 PM
Argue for your limitations
ajbaker's Avatar
Lincoln, CA
Joined Oct 2006
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Quote:
Originally Posted by Prof100 View Post
Or just buy a SOTOG mount directly from him or from HeadsupRC.


However, sometimes making your own is fun too.
You caught yourself. Nice save.
AJ
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Old May 30, 2011, 01:49 PM
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Quote:
Originally Posted by Prof100 View Post
True, I find myself doing things myself simply because I want to do so.
As a 14 year old,I started making my own design control line planes from whatever I could buy steal or rework.
Actually was good training for engineering n design work I did much later.
The guys I worked with , often had no concept of what it took to assemble a design or how the users could maintain it .
A Masters degree was of no help if the person had no concept of how things were used .
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Old May 30, 2011, 01:50 PM
I fly lawn darts with wings.
United States, CA, Turlock
Joined Apr 2011
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Originally Posted by guy hanson View Post
Aw-that ruins half the fun.
How expensive is that piece - shipped ?.
18$ shipped IIRC.
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Old May 30, 2011, 01:56 PM
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Decent price-for nice work.
I built n sold kits for years in 80's 90's -for pattern flyers
If I had had a computer setup and laser cutter -I would have been in hog's heaven.
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Old May 30, 2011, 02:07 PM
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Canton, Michigan USA
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Quote:
Originally Posted by guy hanson View Post
As a 14 year old,I started making my own design control line planes from whatever I could buy steal or rework.
Actually was good training for engineering n design work I did much later.
The guys I worked with , often had no concept of what it took to assemble a design or how the users could maintain it .
A Masters degree was of no help if the person had no concept of how things were used .
It's nice to have both practical experience and the corresponding education especially when venturing into new design territory.
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Old May 30, 2011, 02:11 PM
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Quote:
Originally Posted by Jurgen Heilig View Post
Preferably you should use a collet type prop adapter.

Jürgen
Aah, no, not for the prop. On the Turnigy motor there's a grub screw retaining the shaft into the rotor, at the back of the bell. The purpose-made shaft has a flat there.
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Old May 30, 2011, 02:22 PM
JOHN 3:16
Sammy70's Avatar
Central Ohio
Joined Feb 2008
6,177 Posts
Oops!@!

"Sure guys, I can do a touch-n-go from the creek"

"Watch this!"

"Ahh, CRAP!@!"


A little too much touch, and not enough go!
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