SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Dec 30, 2012, 01:07 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Another flight today, 30th dec 2012:

30dec012 (2 min 59 sec)


Mitja
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Sign up now
to remove ads between posts
Old Jan 03, 2013, 04:21 AM
AMA 670207
Rudderman98's Avatar
United States, WA, Sumner
Joined Oct 2000
2,775 Posts
Mitja,

What a fantastic and unique model!

I was looking for a new high winger to build other than the usual Piper Cubs and such and I found it. The flying characteristics are exactly what I've been looking for.
I can't wait to start building!

Payment sent for the plans. Are the plans in paper form or electronic?

Perry
Rudderman98 is offline Find More Posts by Rudderman98
Reply With Quote
Old Jan 03, 2013, 02:29 PM
AMA 670207
Rudderman98's Avatar
United States, WA, Sumner
Joined Oct 2000
2,775 Posts
Just received the plans via email and I must say they are very detailed. This model would make a very nice laser cut kit and I for one would purchase it if it was.

I won't be building this model soon but I will add it to the growing list of projects I have to get to.

Maybe this one will be moved to the top of the list.

Perry
Rudderman98 is offline Find More Posts by Rudderman98
Reply With Quote
Old Jan 06, 2013, 08:38 AM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Hi!

As I recieved some questions regarding installed equippment, here are some data:

For elevator and rudder (pretty lage surfaces) you should use servos with min 5kgcm of torque, and for Flaps and Ailerons of min 2,5kgcm of torque.

On my prototype I use:
Rudder: Towerpro MG996R 10kg Servo 55g / 10kg
Elevator: Corona 538MG Digital Metal Gear Servo 7.0kg
Flaps and ailerons: HKS-9650 High Speed Servo 2.3kg
I use 140% of travel on the flaps and ailerons servos to reduce their load.

Regarding the ESC, Turnigy Plush 80A should be sufficient.

Mitja
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 06, 2013, 08:41 AM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
A word of caution!

As Marabu is twice lighter that "ordinary" model of this size, one should be always aware that he could overstress model if making brutal actions on controlls while full power.

Wing struts are fully functional like on a real plane, so make them well and secure bolts and nuts against loosing under vibrations.
On teh wing attachment I use nylon bolts M4 ant they are firmly bolted.
On the fuselage strut jount I secure nuts such way that I wrap bolt and nut with kitchen bungee.
It works !

When making a looping, do full power in climbing part of the loop, then put motor on idle, when model goes over the top until it is out of loop flying level again. Now add power.

Knife edge flight is simple due lightweight frame. Just add rudder and power not to loose altitude.

Rolls are easy.

Inverted flight is also done easy.. from top of loop or from a roll. Please, secure wings well with M4 nut at the roots, as inverted flight want to pull wings appart from fuselage joiners. I add rubber washers under these M4 nuts at the root, to prevent unbolting by vibrations.

Mitja
ultralajt is offline Find More Posts by ultralajt
Last edited by ultralajt; Jan 06, 2013 at 08:51 AM.
Reply With Quote
Old Jan 14, 2013, 06:08 AM
hul
Registered User
hul's Avatar
Switzerland
Joined Mar 2003
2,115 Posts
Quote:
Originally Posted by ultralajt View Post
Motor: TURNIGY AERODRIVE XP C 3548-800
Battery: RHINO 20C 4S1P 3700mAh
Prop: APC E 13/6.5"
how many amps do you get with this?

Thanks, Hans
hul is offline Find More Posts by hul
Reply With Quote
Old Jan 14, 2013, 01:46 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Quote:
Originally Posted by hul View Post
how many amps do you get with this?

Thanks, Hans
I did not measure the current. I checked often the temperature of the battery and motor, and after a normal flight they are mild warm. Never hot, so I suppose, that amps not went ballistic. But mostly my flights looks like flying an electric glider ..regarding use of power. I climb, turn power off and cruise around. When low, again turn power on and clim or just playing around low. After long power off flights, motor and battery are cool after landing.
I use full power only at take of and climb (up to ~350m) and maybe on some of vertical parts of aerobatics.

Mitja
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 14, 2013, 02:36 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Marabu-video (2 min 57 sec)


Marabu wing camera (3 min 57 sec)


MARABU 2012 FIRST FLIGHT (5 min 10 sec)


Mitja
ultralajt is offline Find More Posts by ultralajt
Last edited by ultralajt; Jan 14, 2013 at 03:29 PM.
Reply With Quote
Old Jan 14, 2013, 02:50 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Some data taken from test flight with GPS logger onboard:

Climb with flaps in neutral: 3,3m/s
Climb with flaps in starting position: 3m/s
Vertical sinking with power off (gliding): 1,1m/s
Speed range without flaps: 25 to 45 km/h
Speed range using flaps: 15 to 45 km/h
Diving speed in butterfly configuration: 55 km/h @ sinking speed 5,5 m/s
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 14, 2013, 03:43 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 15, 2013, 06:22 AM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
I thought it would be convinient to gather all Marabu videos in one playlist (so far 25 video clips):

Marabu moving (1 min 8 sec)
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 26, 2013, 11:27 AM
Slope-a-Dope
Steve 0's Avatar
United States, UT, Draper
Joined Dec 2012
2,092 Posts
Just beautiful, Mitja!

The wing cam video is my favorite. The STOL video was crazy! I judged some of the takeoffs as short as maybe 1.75M! Or maybe 2M....still amazingly short and very brave for flying in that much wind.

Congrats on this project! Your village and country landscape make me want to visit Slovenia.

Steve
Steve 0 is offline Find More Posts by Steve 0
Reply With Quote
Old Jan 27, 2013, 10:26 AM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Quote:
Originally Posted by Steve 0 View Post
Just beautiful, Mitja!

The wing cam video is my favorite. The STOL video was crazy! I judged some of the takeoffs as short as maybe 1.75M! Or maybe 2M....still amazingly short and very brave for flying in that much wind.

Congrats on this project! Your village and country landscape make me want to visit Slovenia.

Steve
Thanks Steve!
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old Jan 27, 2013, 10:32 AM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
SPECIAL ANOUNCMENT!!

I ve just made DXF file that consists from all MARABU parts that are suitable for making them with CNC Router or CNC Laser cutting machines.

All buyers that will place order for Marabu plans till 3rd of Februar 2013, will recieve also that DXF file for free. Buyers that already purchased Marabu plans, will recieved that gift shortly!

After this offer expire, DXF files will have price of 7,00 on my webshop, so hurry !!!

DXF file preview:


Regards!

Mitja
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Old May 04, 2013, 04:26 PM
Registered User
ultralajt's Avatar
Ljubljana Brnik, Slovenia
Joined Sep 2004
1,246 Posts
Just having FUN!

Marabu Flyby (0 min 34 sec)


and making some aerotowings:

Aerozaprega Kompolje 3.5.2013 (1 min 16 sec)
ultralajt is offline Find More Posts by ultralajt
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Build log PIK-7 Harakka II, 1:4 (2,65m) with free plan tuootal Scale Sailplanes 152 Sep 24, 2014 11:42 AM
Discussion Giezendanner Marabu 1972 (most likely year) kit. bossee Classic Pattern Flying 18 Oct 12, 2013 03:27 AM
Build Log My Giant Parkflyer MARABU ultralajt Parkflyers 39 Dec 16, 2012 10:16 AM
Discussion Would 800W motor with 1150 do for a 2-3kg-ish RCM trainer? minivation Power Systems 5 Aug 27, 2011 01:22 PM
Discussion Marabu 6 Lone Ranger Electric Sailplanes 0 Dec 21, 2008 04:09 PM