Foamies Talk about building, power setups and anything having to do with e-powered foamy planes!

RC conversion to a Cheetah chuck glider.

Old 07-07-2021, 03:14 PM
  #1  
quorneng
Super Contributor
Thread Starter
 
quorneng's Avatar
 
Join Date: Jul 2008
Location: Cheshire, UK
Posts: 2,018
Default RC conversion to a Cheetah chuck glider.

I did an RC conversion to a Lidl XL chuck glider which flew well enough but when I saw the similar sized Cheetah it looked a bit more like a true glider.
Click image for larger version

Name:	Orange.jpg
Views:	25
Size:	72.8 KB
ID:	188467
The original wing was already in two pieces so I judged it would make an even better glider with an added constant chord centre section.
Actually a built up structure with 2mm Depron skins over 3D printed ribs and shear web.
Click image for larger version

Name:	Center2.JPG
Views:	26
Size:	188.4 KB
ID:	188468
I judged the Depron skin would be quite adequate to handle all the flying loads.
As I did with the Lidl I added trailing edge 'extensions' to the foam outer panels to give a fine trailing edge rather than the 4 mm thick edge of the moulded foam wings.
Click image for larger version

Name:	Extensions1.JPG
Views:	24
Size:	175.8 KB
ID:	188469
The new centre section was made to match the extended trailing edge foam wings. These trailing edge extensions also allowed the ailerons to be a bit broader without having to cut too much into the moulded foam..
The foam wing is just thick enough to allow the servo to be glued in so it lies flush with the wind underside.
Click image for larger version

Name:	ServoLink2.JPG
Views:	27
Size:	147.0 KB
ID:	188470
Note the aileron horn is set back abut 3 mm from the hinge line to give a significant mechanical aileron differential (more up than down). Aileron differential is an important feature on a big wing span glider to limit adverse aileron yaw particularly as to save weight the Cheetah will have no rudder being flown 'bank and yank'.
To be continued.


Last edited by quorneng; 07-07-2021 at 03:45 PM.
quorneng is offline  
Old 08-17-2021, 10:21 PM
  #2  
quorneng
Super Contributor
Thread Starter
 
quorneng's Avatar
 
Join Date: Jul 2008
Location: Cheshire, UK
Posts: 2,018
Default

After a bit of a delay some progress.
The nose has been carefully converted to not only enclose the motor but with an air intake above the spinner.
Click image for larger version

Name:	AirIn.JPG
Views:	20
Size:	134.3 KB
ID:	188509
There are air exhausts on either side.
Click image for larger version

Name:	AirOut.JPG
Views:	16
Size:	151.4 KB
ID:	188510
The cockpit area is hollowed out quite a bit.
Click image for larger version

Name:	Cockpit.JPG
Views:	16
Size:	186.5 KB
ID:	188511
A printed battery holder is glued in
.Click image for larger version

Name:	BattHolder.JPG
Views:	18
Size:	166.9 KB
ID:	188512
The 10A ESC is mounted in a printed holder set into the outside wall of the cockpit.
Click image for larger version

Name:	ESCmount.JPG
Views:	16
Size:	151.6 KB
ID:	188513
The 3.7g elevator servo is mounted under the wing.
Click image for larger version

Name:	EleServo.JPG
Views:	16
Size:	113.6 KB
ID:	188514
With nylon pull/pull wires direct to the elevator.
Click image for larger version

Name:	ElePullPull2.JPG
Views:	17
Size:	103.7 KB
ID:	188515
The completed Cheetah
Click image for larger version

Name:	Complete1.JPG
Views:	16
Size:	373.4 KB
ID:	188516
With a 600 mAh 2s it weighs 198g.
Always intended to more of a glider than a power plane it flies sedately under power but has a considerable power endurance of a good 20 minutes which coupled with a good glide and excellent thermal abilities means flights can be quite long.
A rather shaky video of a short flight kept low for the camera.
You have to keep low as at any sort of height it is almost invisible to the camera. Its not that easy for a human to see either!

Last edited by quorneng; 08-18-2021 at 10:12 AM.
quorneng is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
aaindthu
Foamies
98
11-17-2019 04:24 PM
Jimigunne
Foamies
9
11-05-2018 08:21 AM
NitroCharged
Electric Ducted Fan Jets
3
10-04-2014 11:26 AM
planefixr
Hi-Performance and Sailplanes
2
08-06-2012 03:56 AM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not 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


Quick Reply: RC conversion to a Cheetah chuck glider.


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.

Page generated in 0.08857 seconds with 13 queries