May 30, 2011, 12:49 PM
Argue for your limitations
ajbaker's Avatar

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
Sign up now
to remove ads between posts
May 30, 2011, 12:53 PM
Registered User
Prof100's Avatar
Quote:
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.
May 30, 2011, 12:55 PM
I fly lawn darts with wings.
I am not a structural engineer, so I will be balancing the prop well, using the sotog mount and hoping for the best.
May 30, 2011, 01:18 PM
Argue for your limitations
ajbaker's Avatar

Doing things differently.


Quote:
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
May 30, 2011, 01:32 PM
Registered User
guy hanson's Avatar
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.
Last edited by guy hanson; May 30, 2011 at 01:38 PM.
May 30, 2011, 01:36 PM
Registered User
Prof100's Avatar
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.
May 30, 2011, 01:40 PM
Registered User
guy hanson's Avatar
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 ?.
May 30, 2011, 01:41 PM
Registered User
Prof100's Avatar
Quote:
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.
May 30, 2011, 01:42 PM
Argue for your limitations
ajbaker's Avatar
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
May 30, 2011, 01:49 PM
Registered User
guy hanson's Avatar
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 .
May 30, 2011, 01:50 PM
I fly lawn darts with wings.
Quote:
Originally Posted by guy hanson View Post
Aw-that ruins half the fun.
How expensive is that piece - shipped ?.
18$ shipped IIRC.
May 30, 2011, 01:56 PM
Registered User
guy hanson's Avatar
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.
May 30, 2011, 02:07 PM
Registered User
Prof100's Avatar
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.
May 30, 2011, 02:11 PM
Registered User
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.
May 30, 2011, 02:22 PM
PSALM 14:1
Sammy70's Avatar

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!


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Fun Cub sinowace Hitec/Multiplex USA 14 Oct 09, 2011 04:43 PM
Discussion Multiplex Fun Jet at the lake bah7566 FPV Talk 31 Jan 03, 2010 09:19 AM
For Sale Multiplex Fun Jet -- PRICE DROP Toby W Aircraft - Electric - Airplanes (FS/W) 2 Dec 28, 2009 09:51 AM
Video Multiplex Fun Jet FPV set up test bah7566 Electric Plane Talk 0 Dec 25, 2009 10:05 PM
Wanted multiplex fun-jet or trade! heli123 Aircraft - Electric - Jets (FS/W) 0 Nov 14, 2009 11:02 AM