Notices
Electric Aerobatic & Sport Planes Discuss rc electric aerobatics and rc sport flyers here.

Extra 300L 1/4 scale

Old 07-17-2003, 02:05 PM
  #1  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

Hi

just wanted to show my Extra 300L

It has been sitting quiet for almost a year now, waiting for the New Hacker C50 motor.

finally the motor arrived, and I brought it back to flying status!

this is a pretty big ARF plane, 185cm/73" wingspan and approx6,5kg AUW (6,2-6,5kg)

the power comes from a Hacker C50 14XL Acro, geard 6.7:1 swinging a 20x13 prop to almost 6000rpm. 30x2600HR provides the current.
Attached Thumbnails Click image for larger version

Name:	94533_16077.jpg
Views:	278
Size:	65.9 KB
ID:	54284  
Old 07-17-2003, 02:08 PM
  #2  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

The Hacker C50XLwith gearbox

developed from a B50XL, but with new case, new laminated magnet and a heavy hudy gearbox to allow big props!
Attached Thumbnails Click image for larger version

Name:	94537_16077.jpg
Views:	14
Size:	40.2 KB
ID:	54285  
Old 07-17-2003, 02:09 PM
  #3  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

CNC machined motormount from aluminium, fits very nice
Attached Thumbnails Click image for larger version

Name:	94541_16077.jpg
Views:	9
Size:	63.6 KB
ID:	54286  
Old 07-17-2003, 02:11 PM
  #4  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

Motor mounted in its mount, eights screws hold this beast in place. 4x M4 transfers the force over to the firewall.
Attached Thumbnails Click image for larger version

Name:	94538_16077.jpg
Views:	12
Size:	58.7 KB
ID:	54287  
Old 07-17-2003, 02:12 PM
  #5  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

the Big Extra flying, knifedges very well
Attached Thumbnails Click image for larger version

Name:	94539_16077.jpg
Views:	13
Size:	17.4 KB
ID:	54288  
Old 07-17-2003, 02:15 PM
  #6  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

inverted pass.

with this new setup I get flight times of 6,5min, with power left! Ive only made 2 flights with the new C50, I beleve future flights will be around 8min, which is just as I want it

enjoy the video: Extra 300L 24%
Attached Thumbnails Click image for larger version

Name:	94540_16077.jpg
Views:	14
Size:	16.5 KB
ID:	54289  
Old 07-17-2003, 05:02 PM
  #7  
DominicM
 
DominicM's Avatar
 
Join Date: Nov 2002
Location: Hampshire, , UNITED KINGDOM
Posts: 1,979
Received 14 Likes on 12 Posts
Default Extra 300L 1/4 scale

Something wrong with the WMV movie I think. Stops after 30 seconds and goes back to the start. Maybe it's my setup but don't think so.
Old 07-17-2003, 06:09 PM
  #8  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

yeah, somethings wrong... Ill try to fix it ASAP
Old 07-17-2003, 06:18 PM
  #9  
Greg Covey
Senior Member
 
Greg Covey's Avatar
 
Join Date: May 2003
Location: Rochester, NY
Posts: 5,710
Likes: 0
Received 2 Likes on 2 Posts
Default Extra 300L 1/4 scale

Hi Henke,

A 1/4 scale electric conversion....very nice!

That is a sweet power system you have. The mount looks very solid too!

Regards.
Old 07-19-2003, 09:29 PM
  #10  
tailheavy
Senior Member
 
Join Date: May 2003
Location: Virginia Beach, VA
Posts: 132
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Wow, electrics are lookning up!!!
Old 07-21-2003, 09:43 PM
  #11  
3DFanatic
Senior Member
My Feedback: (5)
 
Join Date: Jul 2003
Location: Tacoma, WA
Posts: 2,668
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

1/4 Scale Extra...wow

Anyone know Electric Jim? He's the guy that had that 50% ultralight in Model Airplane News several months ago???
Old 07-21-2003, 10:37 PM
  #12  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

hi

Heres a link to the video, hope it works better. I can only host it on this server for a limited time....

Extra 300L
Old 07-23-2003, 12:20 PM
  #13  
Rosisco
Junior Member
 
Join Date: Jul 2003
Location: Kelowna, BC,
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Looks Great......Is the 6.5kgs the total flying weight including the batteries?........What was your target airframe weight?
Old 07-23-2003, 02:12 PM
  #14  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

Hi

yeah, 6,5kg includeing the 2kg battery.

I think this plane would need a heavy glow engine to get CG right, I got a 500g motor and 30cells hanging in the nose to get a proper CG I doubt the 5,5kg stated on the box is possible...

any how 5,5kg + 500g fuel = 6kg AUW


Ive flown it at 6002g, and now it is about 6,5kg, I se no diffrence in performance, still possible to do a 3 point landing.
Old 07-23-2003, 08:21 PM
  #15  
Rosisco
Junior Member
 
Join Date: Jul 2003
Location: Kelowna, BC,
Posts: 10
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Interesting stuff.........I have an 82" scratch built Sukhoi with a 46cc pouland chainsaw engine on it that weighs about 7.7kgs and I was going to attempt to lighten the next one to approximately 6.5kgs as well. The motor weighs 2.2kgs with the muffler. Was that engine mount available with the engine or was it purchased separately?.................Hmmm, this hobby always keeps the mind going. Thanks
Old 07-23-2003, 09:25 PM
  #16  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

Yeah, you always find new challanges!

Im soon to build a Funtana Pro for the equipment in the Extra. 80" and 4,8Kg :-) then Ill put on the 24x12 APC E and get 10kg thrust!
Old 08-13-2003, 03:59 AM
  #17  
Tipover
My Feedback: (44)
 
Join Date: Jun 2002
Location: USA
Posts: 519
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Very nice job!, is the Extra scratch built, or a kit???

Kevin
Old 08-13-2003, 10:55 AM
  #18  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

thanks

it is a Fun key ARF, or Yellow aircraft. very nice ARF. I was going to say a bit on the heavy side... and sure its not that light, but still you can perform 3 point landings, and all aerobatic manovers.

I decided to build a Funtanta Pro now, but maybe after that Ill build a scratch Extra, useing the motorcowling and canopy from this one, makeing it a bit lighter and 3D capable for some more fun
Old 08-13-2003, 03:46 PM
  #19  
Tipover
My Feedback: (44)
 
Join Date: Jun 2002
Location: USA
Posts: 519
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Yep, It looks great, but its hard to beat a purpose built electric airframe. What peak current is your power system pulling?

Kevin
Old 08-13-2003, 06:52 PM
  #20  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

I pull about 50A, havet messuerd it yet. I get way more thrust then weight, and almost unlimited verticals...
Old 08-13-2003, 07:33 PM
  #21  
Tipover
My Feedback: (44)
 
Join Date: Jun 2002
Location: USA
Posts: 519
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

I was just trying to figure out how many Lithium Poly cells I would need to fly something that big for around 15 minuit's

Kevin
Old 08-31-2003, 02:41 PM
  #22  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

9s4p thunderpower will fly it for 30min or so.... and it will be a pound lighter

will use this motor on 8s4p and a 24x12 prop in a 80" Funtana later on. =)
Old 09-02-2003, 07:20 PM
  #23  
Hannu Vuorinen
Senior Member
 
Join Date: Aug 2003
Location: Helsinki, FINLAND
Posts: 122
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

God dag, Henke!

Hur gr det? Can we see your Extra flying in next
year Barkarby Scale competition? Would be nice to see electric also in Aresti class!
Old 09-05-2003, 11:52 AM
  #24  
Henke Torphammar
Thread Starter
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,966
Likes: 0
Received 1 Like on 1 Post
Default Extra 300L 1/4 scale

Hej Hannu!

Next year Ill hopefully have the equipment in a Funtana... Ill probably not compete (takes too much time) but Ill try to pull off some 3D/freestyle demo

same day I asked if I could compete in the rookie class with the Funtana they changed the wing span limit to 190cm lucky day
Old 09-06-2003, 09:16 PM
  #25  
Hannu Vuorinen
Senior Member
 
Join Date: Aug 2003
Location: Helsinki, FINLAND
Posts: 122
Likes: 0
Received 0 Likes on 0 Posts
Default Extra 300L 1/4 scale

Hejsan, Henke!

Is there any larger scale models in Sweden except your Extra
going electric in competition level? In Finland we got few of them entering in sport scale class. Where you at Stockholm scale days
this year?

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


Thread Tools
Search this Thread

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.