The Oblivion 300+ - a microheli project - Page 21 - HeliFreak
Fun, Learning, Friendship and Mutual Respect START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopters > Main Forum - Helicopter Talk


Main Forum - Helicopter Talk R/C Helicopters and the people who fly them. VENDOR TOPICS DO NOT GO HERE. Full Scale Heli threads go in OT please


Reply
 
LinkBack Thread Tools Display Modes
Old 12-29-2016, 03:53 AM   #401 (permalink)
Registered Users
 
Posts: 9,226
 

Join Date: Dec 2011
Location: Sacramento CA
Default

I have a suggestion, how about a 3D printed tail hub? Instead of a solid hub it could be a teetering tail like the Goblin 380 uses. The hub block would have a hole in it that the shaft is pressed/glued into and there would be a common spindle and dampers like a main rotor head. Because the tail spindle floats on rubber dampers it reduces the strain on the tail. Most implementations of this style of tail also have some delta-3 to correct for dissymmetry of lift in the tail rotor which further reduces stress on the tail hub and bearings (SAB uses something like a 15 degree offset on the tail grip links). Note also that this type of tail requires link balls on the tail grips because the grips and spindle must be able to teeter slightly which isn't compatible with links that are restricted to being parallel with the tail grips and slider.

In addition to the performance improvement this type of tail allows for some bearing preload to be designed into the grips because the dampers can be compressed slightly which yields tight stop free tail grips.
Atomic Skull is offline        Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-09-2017, 11:08 PM   #402 (permalink)
Registered Users
 
Posts: 4,557
 
My HF Map location
Join Date: Jun 2006
Location: Christiansburg, VA, USA
Default

Anyone use 3dHubs for their parts? How much do the parts from ShapeWays cost?

Looks like about $100 in parts on 3dHubs.
__________________
Jeti DS14us -- TT e700 -- 6s Logo600se UL -- Logo600-3d -- Logo500 UL

Last edited by prototype3a; 01-10-2017 at 01:05 AM..
prototype3a is online now        Reply With Quote Quick reply to this message
Old 01-31-2017, 05:00 PM   #403 (permalink)
Registered Users
 

Join Date: Sep 2008
Location: Bryan, TX
Default

What else is new with this project?
ben_beyer is offline        Reply With Quote Quick reply to this message
Old 03-10-2017, 09:13 PM   #404 (permalink)
Registered Users
 
Posts: 6,753
 
My HF Map location
Join Date: Aug 2011
Location: COLDHIO
Default

very cool little machine!!
crf69 is online now        Reply With Quote Quick reply to this message
Old 04-03-2017, 04:17 PM   #405 (permalink)
Registered Users
 

Join Date: Apr 2015
Location: SomewhereBetweenHereAndThere
Default

Hey guys,
is ABS or NYLON good plastic choices for this heli?
thanks.
__________________
Logo550SeVbar, Logo600SxVbar, Logo600SeIkon2, Trex600CfVbar, Trex550V1Vbar, Futaba 14SG
hilarious is offline        Reply With Quote Quick reply to this message
Old 04-04-2017, 03:18 PM   #406 (permalink)
Registered Users
 

Join Date: Apr 2015
Location: SomewhereBetweenHereAndThere
Default

hey guys,
a few more questions, please (I hope this thread isn't dead):
-what kind of bearing should I use to join the two swash plate halves?
-I see that the main blade grips look different in some photos. Are you guys using blade grips from another brand?
-is someone printing the heli in abs or nylon?
thanks.
__________________
Logo550SeVbar, Logo600SxVbar, Logo600SeIkon2, Trex600CfVbar, Trex550V1Vbar, Futaba 14SG
hilarious is offline        Reply With Quote Quick reply to this message
Old 04-04-2017, 03:25 PM   #407 (permalink)
Registered Users
 
Posts: 2,823
Thread Starter Thread Starter
 

Join Date: Nov 2012
Location: Germany
Default

Quote:
Originally Posted by hilarious View Post
hey guys,
a few more questions, please (I hope this thread isn't dead):
-what kind of bearing should I use to join the two swash plate halves?
-I see that the main blade grips look different in some photos. Are you guys using blade grips from another brand?
-is someone printing the heli in abs or nylon?
thanks.
Well, swash bearing is stated on website, 12x18x4mm

The Smooth, thick version of the grips is new and considerably stiffer than the old version with the support ridges on top and bottom. Just didn't redo the renders as it's quite tedious.

It's not recommended to print this heli out of filament, and afaik no one has ever tried it. I'd be concerned about blade grip ejection. The recommended process is to order at shapeways
__________________
Jonas (I apologize for this ugly, overloaded signature, I was forced to change it.)
LOGO 700, LOGO 600 SX, Forza 450, Oblivion 300+
AccuRC 2.0 Developer
Oblivion Contributor/Chief Destructor
Johnny31297 is online now        Reply With Quote Quick reply to this message
Old 04-05-2017, 01:44 PM   #408 (permalink)
Registered Users
 

Join Date: Apr 2015
Location: SomewhereBetweenHereAndThere
Default

hello Jonas,
thanks a lot.
what does "M2 locknuts and M2x4/6/8/10/12/16/20 bolts" mean exactly? how many of each length?
thanks again.
__________________
Logo550SeVbar, Logo600SxVbar, Logo600SeIkon2, Trex600CfVbar, Trex550V1Vbar, Futaba 14SG
hilarious is offline        Reply With Quote Quick reply to this message
Old 05-14-2017, 08:22 PM   #409 (permalink)
Registered Users
 
Posts: 4,831
 

Join Date: Sep 2006
Location: canada
Default

I started to work on this.

All parts are printed.

I am unable to source out the 8mm brass ball.. Does anyone have one they can send me ?
__________________
Team Fun / Heli Canada


**When you start to be in complete control reflexes are not a requirement.**
s0laris is offline        Reply With Quote Quick reply to this message
Old 05-25-2017, 11:37 PM   #410 (permalink)
Registered Users
 
Posts: 4,831
 

Join Date: Sep 2006
Location: canada
Default

I cannot locate a ball for swash. can someone here make one and send me one ?

Happily pay for it.
__________________
Team Fun / Heli Canada


**When you start to be in complete control reflexes are not a requirement.**
s0laris is offline        Reply With Quote Quick reply to this message
Old 05-26-2017, 03:52 AM   #411 (permalink)
Registered Users
 

Join Date: Aug 2010
Location: Houten, The Netherlands
Default

Quote:
Originally Posted by s0laris View Post
I cannot locate a ball for swash. can someone here make one and send me one ?

Happily pay for it.
Hi. The advise is to get 1x GE4E spherical ball bearing (pop out inner ball)
http://www.oblivion-heli.com/index.php/getting-started/

My experience that this bearing size is available with more then one inner ball size. So please order 1 or more from different suppliers.

To be honest, I bought a massive ball and drilled the hole.

__________________
Logo 550SX and 600SX
Building an Oblivion 300+ remote control helicopter
Wiebe_nl is offline        Reply With Quote Quick reply to this message
Old 05-26-2017, 09:58 AM   #412 (permalink)
Registered Users
 
Posts: 4,831
 

Join Date: Sep 2006
Location: canada
Default

Ya I did order one and the ball was 9.1 mm instead of 8.

what vendor had the 8mm version ?

I will look for more vendors in mean time
__________________
Team Fun / Heli Canada


**When you start to be in complete control reflexes are not a requirement.**
s0laris is offline        Reply With Quote Quick reply to this message
Reply

Tags
oblivion 300, oblivion 300+, oblivion heli




Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the HeliFreak forums, you must first register.
Please enter your desired user name, your REAL and WORKING email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself. Use a real email address or you will not be granted access to the site. Thank you.
Email Address:
Location
Where do you live? ie: Country, State, City or General Geographic Location please.
Name and Lastname
Enter name and last name here. (This information is not shown to the general public. Optional)
Helicopter #1
Enter Helicopter #1 type and equipment.
Insurance
Please select your insurance company (Optional)
Helicopter #2
Enter Helicopter #2 type and equipment.
Helicopter #3
Enter Helicopter #3 type and equipment.
Helicopter #4
Enter Helicopter #4 type and equipment.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




Copyright © VerticalScope Inc. All rights reserved.
 

SEO by vBSEO 3.6.1