HobbyKing.com New Products Flash Sale
Reply
Thread Tools
This thread is privately moderated by Herb, who may elect to delete unwanted replies.
Old Jan 28, 2008, 12:08 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Discussion
Dassault Rafale C twin EDF

Aeronaut Rafale twin 90mm, my second one. Twin 90mm WeMoTec Midi fans with Kontronic Fun 500-19 motors and twin Kontronic Jazz 80 controllers.

Weight rtf ca. 3.39kg (7.46lbs), power 2000-2600 Watts depending on Lipo setup.

http://www.aero-naut.net

http://www.kontronikusa.com

More details on the Aeronaut Rafale here and here, and here:

http://www.rc-network.de/forum/showthread.php?t=9823

Recent video (Jan 2010):

Aeronaut Rafale twin 90mm EDF 2010 (2 min 22 sec)


.
Herb is offline Find More Posts by Herb
Last edited by Herb; Feb 13, 2010 at 12:51 PM.
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 15, 2008, 02:02 AM
Registered User
gaviator's Avatar
Tbilisi, Georgia
Joined Feb 2007
88 Posts
Sweet looking plane!
Love kontronik motors. what thrust/weight ratio you got?
gaviator is offline Find More Posts by gaviator
Reply With Quote
Old Feb 15, 2008, 12:11 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Thanks It's a sweet flier ...

Installed thrust is around 3.3 kg (7.3 lbs) so the thrust to weight ratio is around 0.9-1.0 .

Kontronic motor thrust data in the WeMoTec Midifan can be found here:

http://www.kontronic.com/DownlMesImp.htm

.
Herb is offline Find More Posts by Herb
Reply With Quote
Old Feb 15, 2008, 07:23 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Rafale video with takeoff from an asphalt runway:

Rafale twin 90mm EDF by Aeronaut (1 min 20 sec)
Herb is offline Find More Posts by Herb
Reply With Quote
Old Feb 15, 2008, 07:24 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Two short Rafale videos with grass/dirt takeoffs and landings:

Rafale twin 90mm RC EDF by Aeronaut (3 min 10 sec)


Aeronaut Rafale EDF twin 90mm (2 min 12 sec)
Herb is offline Find More Posts by Herb
Last edited by Herb; Feb 25, 2008 at 02:02 AM.
Reply With Quote
Old Feb 15, 2008, 09:48 PM
Balsa for me, thanks.
irish_lord99's Avatar
Yalova, Turkey
Joined May 2007
835 Posts
What?! Those air to air missles aren't functional? Sweet plane!
irish_lord99 is offline Find More Posts by irish_lord99
Reply With Quote
Old Feb 22, 2008, 06:39 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
... and here's the original black Rafale

http://www.youtube.com/watch?v=BnEsQqzG6MM
Herb is offline Find More Posts by Herb
Reply With Quote
Old Apr 22, 2008, 02:50 PM
Lori, hey, you're home early
CarreraGTSCS's Avatar
United States, NJ, Trenton
Joined Jan 2004
9,090 Posts
Life is good when a man has two Rafales

Very nice.

Mike
CarreraGTSCS is online now Find More Posts by CarreraGTSCS
RCG Plus Member
Latest blog entry: Split elevator set up JR 9303
Reply With Quote
Old Nov 04, 2008, 01:18 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Twin twins

The older grey one has been re-motored with twin Hacker B50's and bigger Hacker Master esc's ,

5- year WeMotec fan overhaul
Herb is offline Find More Posts by Herb
Reply With Quote
Old Dec 28, 2011, 02:56 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
... and another video, December 2011:

.

Aeronaut Rafale Twin 90mm - Takeoff after sundown (4 min 18 sec)
Herb is offline Find More Posts by Herb
Reply With Quote
Old Sep 05, 2012, 06:15 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
... I built the grey Rafale twin in 2003 and flew it for nine years

It was time to retire it, it had numerous issues:

worn out geartrain on the servos lead to excessive play in the elevons, retracts had accumulated a ton of dust and grime, nosegear steering worn out, electrical wiring started to peel, chipped blades on both fans, one wemotec plastic spinner exploded last week etc.

I took all the electronics out and will hang the nine-years old overflown airframe in the attic

.
Herb is offline Find More Posts by Herb
Reply With Quote
Old Sep 18, 2012, 11:44 AM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Occasionally twin setups with very lightweight (and thin) composite fuselages tend to resonate a bit at certain rpms, which can be annoying.

I found cotton balls to be very effective at reducing fan noise, vibrations and resonances.

I stuffed the black Rafale full of cottonballs, and it's a lot quieter now in flight
.
Herb is offline Find More Posts by Herb
Last edited by Herb; Sep 18, 2012 at 11:51 AM.
Reply With Quote
Old Sep 18, 2012, 11:48 AM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
On the last flight of the black Rafale last week it was so smoking hot (new Gens Ace batteries) that one of the wings was flexing (thanks Bruce for the observation)

More precisely, I inspected it later and I found that the wing-to-fuselage joint that was not as rigid as it should have been.

A partial fix was easy enough ... without taking off the back end of the fuse, I used one of those handy very long hysol gun tips to put some more hysol epoxy at the joint between the fuselage former and the fuse itself.

The wing-to-fuse joint is a lot more rigid now

On the next maintenance cycle I will take the back off and add hysol on that side as well...

.
Herb is offline Find More Posts by Herb
Last edited by Herb; Sep 18, 2012 at 11:53 AM.
Reply With Quote
Old Jul 02, 2013, 03:54 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
More wing mount reinforcements ... the wings still keep flexing at high speed (150mph+).

.
Herb is offline Find More Posts by Herb
Reply With Quote
Old Jul 02, 2013, 03:56 PM
Lithium Member
Herb's Avatar
Irvine, Calif USA
Joined Feb 1999
12,168 Posts
Got a set of these bright inexpensive lights from rcl.

Hopefully the large, bright landing light will be visible during the day, or at least around sundown . I put it on the landing gear (5) channel, so it's off most of the flight ...

For now it's just a test to see if it is visible at all during "normal" flying hours ...

.
Herb is offline Find More Posts by Herb
Reply With Quote
Reply

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
ME-262 and Rafale For sale (Reduced price) bruff Aircraft - Electric - Airplanes (FS/W) 0 Oct 28, 2001 09:16 AM
Help: EDF installation on HobbyLand Me-262 electricrcflyer Electric Ducted Fan Jet Talk 9 Oct 15, 2001 11:26 AM
Terry, Rafale, and ME-262 for sale. bruff Aircraft - Electric - Airplanes (FS/W) 4 Oct 12, 2001 09:03 PM
Rittinger ME-262 (again!) Slope Nut Electric Plane Talk 14 Sep 26, 2001 04:07 PM
ME-262 - Question on duct fans spitfire Electric Ducted Fan Jet Talk 4 Jun 01, 2001 09:31 PM