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Dec 26, 2007, 09:15 AM
AZ Outback
Robert Burson's Avatar

X5J eXtreme NEW YEARS DAY Sign-up

Welcome, back for the fifth year.

Introducing a new class that will run with the X5J eXtreme rules except without a handicap on motor type.

This class will go under the name X5J America. Any electric sailplane may fly this class provided they use 4cells of the A123 type and weigh a minimum of 2.0kg or 70.7oz. The concept is to develop a design around a single power source, with a required weight. Most new chargers can now charge this cell and add on boards are starting to show up for older chargers. The cells cost about 10.00 each in the DIY format, and 18.00 as loose cells. They are able to produce up to 120A of current and maybe charged at 10A, with no risk of fire. This is my attempt to create a simple to monitor set of rules, in an electric soaring format.

I will score this class seperate from the X5J eXtreme, but place them in the final standing.


Remember all photos of new ships are encouraged.

Please read all rules, if you have not flown this event before, everyone else, will note they are unchaned from 2007.

X5J eXtreme Rules:

1. Any electric powered sailplane can enter this contest.

2. There will be three 10minute flights. One point per second of flight time is scored and, one point deducted for each second over the 10minute-flight time. Maximum points possible 600. Round to the closest second for your flight time.

Example 9minutes 50seconds = 540pts + 50pts = 590pts
10minutes 4seconds = 600pts Ė4pts = 596pts

3. Motor run time is unlimited but subtracted from the flight time.

Example, 600 flight pts - 19 motor run pts = 581 total round pts.

4. Landing points to be measured from the center of the landing circle, to the closest part of the plane. For each meter from the point subtract 3 points from 30pts . See attached file for table.

5. Motor handicap: brushless 95%, brushed Cobalt and brushed car motors 75%, Ferrite 45%, and outrunners with a 28mm or less bell diameter and 17mm length 68%, Speed400 30%. Actual motor run rounded to the closest second. Then multiplied by the motor percentage. Round this calculated value to the closest 1/10th of a second.

Example Cobalt motor time 34 .6seconds = 35seconds X 0.75 = 26.25seconds = 26.3 seconds

6. You may restart your, motor as many times, as needed, but on the second motor start, you may not add landing points. A second way of stating this rule. If you start your motor after launch run of the motor, you will not receive any landing points.

7. Your flight is limited, a single dawn to dusk flight day of your choosing, during a 48 hour period.

8. Any type of battery cell is legal.

9. Temperature Factor to be added to total flight score. See the attachment for the temperature table.

Timers still need two stopwatches, this was easier then I thought it would be. Work out a signal with the pilot, if he is going to restart the motor. (I.e. "")

This is the simplest way of scoring I have been able to come up with.

Flight time - closest second
Motor run - closest second
Calculated motor run - closest 1/10th of a second
Landing points - see table Rule #3

To compete: Please list your plane, gearbox, prop, cells and type, weight, and any other interesting facts, pictures are always welcome, to this thread.If someone else, not on the Web would like to fly with you please list him or her, on or by Dec31.

To all who enter,

The Best Soaring

Last edited by Robert Burson; Dec 29, 2007 at 01:22 PM.
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Dec 26, 2007, 11:57 AM
Registered User
Iím in again for the inaugural run of the 2008 X5J postal competition. Iím not sure which plane Iíll fly, but it will have a direct-drive, brushless power system that will put it into the 0.95 handicap class.

I donít have a plane that can reasonably carry four A123 cells, but that may change by the end of the year.

Best wishes to all,

Dec 26, 2007, 01:10 PM
Registered User
Hi folks,
I will fly my GP Fling wing (124 cm) on a Nano Floh fuse. AXI 2212/20 on 3 lipos. 400 grammes. 9x6.5 prop.
If possible I will try my MPX Cularis on 4 A123,AXI 2820/12 and 14x7 prop. I think it is a little bit too light though.
Dec 26, 2007, 02:07 PM
Just plain ridiculous. Sir.
rdwoebke's Avatar
I'm in again. Allegro Lite. A20-20. TP1320 2S. 12x6.5 folder.

Dec 26, 2007, 07:31 PM
what makes that thing go
ploof's Avatar
I'll give it a go, weather permiting.

Blaster 2 Electric

18 5/8oz.

Axi 2212/20

Jeti Spin 22

Thunder Power 910 mah 3 cell lipo

11x7 Robbe prop.

Take care, Ploof
Dec 26, 2007, 08:25 PM
Jesper Frickmann
jfrickmann's Avatar
I am in, with my Renny 2m, recovered after 5 months lost in the woods. 28oz AUW, powered by a Medusa MR-028-032-4200 with a Reisenauer 5:1 gearbox, 14x12 Aeronaut prop, 2S 1800mAh EVO25 pack and CC Phoenix 35 ESC.

Question - is it OK to use the transmitter timer to measure motor run time - timer switch = motor switch?
Dec 26, 2007, 11:41 PM
Tragic case
davidleitch's Avatar
I'm in since I brought the Supra with me up to the North Coast. So Supra (3.4 metres), Hacker B40 6L 4S 2500.

Doubt I'll get many temperature points but may be a rain bonus.
Dec 27, 2007, 12:16 AM
Registered User
BigTilly's Avatar
I be out there weather permitting. I'll fly my Art Hobby Castor, BL480-4D, 4.4:1 with a 12.5x9 prop and 4S 1800 LiPo.

Dec 27, 2007, 06:01 AM
Registered User
ohmite's Avatar
I'm in too. Let's hope for cooperative weather . I'll probably be flying my Hi-Aspect 3.1E with a Hacker B40-9L+4.4:1GB+15x10 prop+3S TP3300 or my Omega 1.8 with a homemade outrunner+12x6prop+3S TP2070.
Dec 27, 2007, 08:57 AM
Registered User
I'll be flying one of my older designs, the MC-4.

99" ws, 54 oz, F-10LMR, 14x9.5 prop, 7x2200 NIMH.
Dec 27, 2007, 01:55 PM
Registered User
jojoen's Avatar
Guess I am back

Pike Perfect, Hacker B50 6S - 6,7:1 - 4s A123 - Auw apx 2500g

Jo Grini
Dec 27, 2007, 02:43 PM
what makes that thing go
ploof's Avatar
Hey there JoJo

Is that an Samba made Electro fuse, or a modification of the regular Perfect fuse?

Landing on bare ice, how far does the kit slide? Still bare ice has to be an improvement on a ship covered with snow.

Take care, Ploof
Dec 27, 2007, 03:03 PM
Registered User
jojoen's Avatar
Originally Posted by ploof
Hey there JoJo

Is that an Samba made Electro fuse, or a modification of the regular Perfect fuse?

Landing on bare ice, how far does the kit slide? Still bare ice has to be an improvement on a ship covered with snow.

Take care, Ploof
Hi there!

A bit off topic but ok..
It is kind of a prototype. They made me a empty fuse ready for electro installation. We wanted to check out what we could install and if we needed to do a new fuse mould and if so if it had to be bigger. We also wanted to check the motor incidence and servo installation.
The electro fuse for Pike Perfect will be available in the spring. So just get on that order list if you need one...

slide? what slide?.... It slides mostly into my hands Ok might be some poor points in the competition if I slide on only ice...
Dec 27, 2007, 03:08 PM
Pontificating Member
tone's Avatar

weather permitting...
Ascent/3s1320/mega 400-12/9x5/16.6 ounces
Sky Sergio - same battery and prop about 20 ounces can't recall the motor, will update the post after a quick checkout tonight..

will likely fly the ascent, but ya never know..
Dec 27, 2007, 06:18 PM
Slope and thermal
- Elegant 700
- 2.7 metre wing span, 1.9 Kg
-Axi 2820-10 motor
-TP4000 prolite 3S2P lipo
-Jeti 70 amp ESC.
-Graupner 12x7 prop.

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