FMS 90mm 12 blade EDF with Predator 3546-1900kv - RCCanada - Canada Radio Controlled Hobby Forum
RCCanada - Canada's Radio Control Hobby Forum
Electric Jets Discuss electric jets in Canada.

Reply
 
Thread Tools Display Modes
Old 09-17-2019, 01:09 PM   #1
4stripes
RCC Supreme Contributor
 
4stripes's Avatar
 
I am: Flyboy 1
Join Date: Feb 2007
Location: Earth

Feedback: 16 / 100%
Posts: 2,346
Total Props: 11
FMS 90mm 12 blade EDF with Predator 3546-1900kv


       Remove this ad - become a site supporter!
A friend asked me to dynamically balance an FMS 90mm fan for him so here are my thoughts on the product.
http://www.fmsmodel.com/fms-90mm-12-...fan-with-motor
The total setup is very light at 325g with connectors.
I think it has the smallest outrunner I have ever seen in a 90mm fan and the 1900kv rating seems incredibly high for a 12 blade rotor. That being said it needed to be disassembled as I wanted to see if the collet adapter and motor mount screws were on securely. No locktite was found and the fan came apart easily. I added locktite to the motor mount screws and placed small fiber washers under each screw. A drop of triflow oil was added to the motor bearings. I then roughened up the motor shaft with a file and cut a slot in the outer end of the adapter so that a flat blade screwdriver could be used to secure the fan nut and collet. The fan had some yellow ball of "?" jammed into the rotor from behind near the hub front. Is it a ball of yellow paper or thin cardboard, who knows, but I left it in there and simply clocked the fan. It didn't take long to find the sweet spot for smoothest running. Then I added the spinner and also clocked its position until smooth. It then needed more weight added. I used approximately 1/4" square duct tape layered twice that was stuck inside the spinner where the weight was needed. The first bits of tape are simply stuck on the outside of the spinner until the location is found then the weight is transferred inside where it will not fall out. Unfortunately I couldn't check the power but looking at the factory details I would think it pulls just over 110amps.
Overall I think it is an amazingly light setup that has plenty of potential. I did fly the same fan in a friends FW F18 and it flew well. The extra dynamic balancing will only make it better.
Attached Thumbnails
Click image for larger version

Name:	90mm__01.jpg
Views:	21
Size:	219.7 KB
ID:	1645387   Click image for larger version

Name:	90mm__02.jpg
Views:	14
Size:	213.3 KB
ID:	1645389   Click image for larger version

Name:	20190917_122617.jpg
Views:	19
Size:	590.7 KB
ID:	1645391  
__________________
Zen thinking * It's rebuildable till it fits back in the box. **
Cheers
4stripes is offline   Quick reply to this message.

Sponsored Links - Subscribe to remove this ad.
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the RCCanada - Canada Radio Controlled Hobby Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionally, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.
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.
Email Address:
Radio of choice?
Which radio is your current favorite to use?
Number of RC Vehicles?
How many boats, cars, planes do you own?

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
vBulletin Message

Thread Tools
Display Modes

Forum Jump


All times are GMT -5. The time now is 11:29 PM.


vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.