25-Jun-24 - 07:39 PM

GPS Triangular Racing - GPS Triangular 2

Written by Hayden Daley - 01 May, 2024.

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March 2024 – Dualsky XM3045EG-12 on 6S and 4S GPS logs

Have not had time to do GPS tests on the EG-12 from Dualsky. But now the weather was favourable although wind was low. To be sure I did some altitude tests upwind/downwind to see wind speed at 200m altitude. Meassurements was 5m/s difference and that means the wind there was about that. On ground it was lower. So I have opted to disregard the wind speed but if you count it also it means 100m more distance covered. If the winds speed had been 12m/s it would mean 100m less distance covered. The old numbers in the excel sheet is done in maybe slightly higher wind and maybe not compareable as I have learned more on how to do the upwind effectively. But I leave them there as they are good numbers. Beware the amp numbers are high and the battery used are drone battery. So never do more than one 30sec go as temperature on motor rises even long after it has stopped. I should have liked to have the new Dualsky 6S900 long battery that should fit in the Prestige nicely but that will have to be a later test when I get my hands on them.

So to the test. I wanted to have a setup that I can run FAR upwind in high wind conditions. It will need to perform very good at 2400g or even higher weights. It also needs to be stable in 100+ flights without burning any motor, esc, battery or connector. I had a few Dualsky motors to test and the XM3045EG-12 at 830kv is doing what I hoped for. Motor is direct driven with a low kv so I could use smaller props with slightly higher pitch. Launch is at 50% power and I go to full power within 2-3 seconds. This helps not having extreme amps when props are stalling in the air before model gets a bit speed.

I have opted to climb first and then fly “straight” to build speed. To me this is easier to find a certain altitude and have a few more benefits. Today I launched 45 degrees to the side of the sun and actually had to stop motor at about 20seconds since visibility of model was poor. Numbers were logged on Altis GPS that logs both altitude and position. Looking at the numbers I will reach over 1000m forward if I use all 30 seconds of motor and try to end up at 200m. I am very happy on the test and it shows I have found some good setup for high wind were I want to reach some distance away. I did 3 tests on 6S and a couple on 4S with same motor/esc (bigger prop with high pitch from CCM). Could have done a lot more different props but I wanted to have fun and enjoy the day on the ice also ;-)

Conclusion is that a direct drive Dualsky is sure enough a possibillity for extreme setup in wind F5J

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November 2023 – Dualsky XM3045EG-12 6S/4S motor and Dualsky 6S ESC

I got a question if I could include some new Dualsky motor(s) and a new ESC. These are intended for higher number of cells as this might be more efficient when one want to have a heavy F5J plane in strong wind. In strong wind one needs forward speed to overcome the wind and also travel forward to start the flight far in front. This way one can follow a thermal for a longer time than if one starts straight above. I received a couple of motors where I soon concentrated on one of them that are actually in the shops at some resellers. I also received a couple of new thin and light motor controllers that is rated to 60A/6S namely the Dualsky Summit 60X.08. Based on BlHeli it can be programmed by USB programmer or thru an old drone Flightcontroller (that is what I do). They come in two versions with BEC 8V or 6V but also a slim/light version have been seen on webshops. Ready soldered together with the XM3045EG-12 the weight is 155g. Beware the motor normally needs 32mm nose but I have mounted it in 30mm also but deppends how well moulded the noses are and how much material is used.

My main goal for the tests was to find a 6S setup with some good pitch that could cover a lot of ground in high wind situations with heavy ballast. But would also be nice to use the same setup on 4S for all “normal” conditions. Testing have shown one actually can just change directly from 4S to 6S when carefully choosing propellers.

One can debate if my old tests from some years ago might have to be done again with the same batteries I have today. But the biggest difference is that some of todays batteries I can do two or even 3 starts with voltage not sagging. This makes it easier to also do the straight line test of amperage I want to include. I used a rather big 6S1100 (rebuilt to 3+3) so I was sure to have enough juice. A smaller 6S might give slightly lower numbers. Especially on the higher amps tests. In competitions I intend to use around 6S 700-900mah that will be heated if the temeperature is below 10-15C.

The motor is designed just like the other canned Dualsky motors as an outrunner that is encapsuled so that the wires can come out from the back and the motor can be screwed directly to the bulkhead. I must say it is amazing quality and the motor never touch the outer shell even at much higher loads than intended on the design.

So is a canned outrunner performing on the level of a geared inrunner? Yes I will say they actually are doing very well. You need slightly more width of the nose but performance of these outrunners have really caught up with the geared stuff.

Testing shows this motor has a fine line around 45-50A when it starts to heat up even at our max 30second runs. So when you choose a setup try to keep under 45-50A. Beware of two things. These tests were done in winter (though with sealed bulkhead and heated batteries) and I do not test motor on the

ground. There is absolutely no point in doing tests on the ground for more than a few seconds because propellers are cavitating and using much more amps than in the air. So DO NOT run F5J motors on the ground for 30seconds on full speed. And meassuring on ground has no point at all. That is also why I state the startup amps that usually goes down to climb amps within a few seconds. So what props did I like best? Well props are getting more and more equal. I mostly use the best carbon brands in my tests (GM, CCM, CN, VM). I think the numbers still tell small advantage from some. If you want me to test others you will have to send me. I have used enough money on stuff and pay full import taxes even on test motors as Norway is outside EC.

There is still tests to be done with GPS/pitot tube but that will have to come later. Hopefully I can do tests side by side in same conditions with the best geared setups from last summer. That will also be interesting.

Conclusion: This is a very interesting and good motor (Dualsky XM3045EG-12 with Dualsky Summit 60X.08) to use from light/normal and up to fully ballasted 2400g F5J models. The climb values on some of the tests are just fantastic and rarely seen on these tiny setups. It is a safer choice for 6S and probably also 4S than the XM3045EG-8 I tested earlier. It also shows small differences in props make huge impact on climb rate and amps. The ESC has been great with not a single hickup and I could program full brake and heavy startup since the outrunner can take it. Big congrats to Dualsky for yet another super F5J motor / ESC

All the other motortests is at the end of this document

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September/October 2023 – CCM props

Long time since my first tests and it has given me a lot of good information whenever I want a change or need that small extra. This summer World Championship F5J showed us some horrible conditions that needed a lot of ballast and powerful powercombo with lots of pitch. I never thought I would need a 6-8cell setup but that is what I should have prepared for. I did not bring the right motors for that but high pitch propellers were in my box. So GM Competion line and a brand new CCM 13x9 was with me. These props were vital as I (we the whole team actually) was stuck in 4S setup and needed that extra speed forward in up to 18m/s in the gusts of some rounds. It was vital to end up 6-800m ahead at just under 200m. That is ok with lots of my

4S setups in calm weather but not with more than 12m/s headwind… So we ended up using bigger 4S batterier and my main propeller became the CCM13x9 on a Tenshock 1510-5000kv motor and AX40/AX60 controller. We did end up in 4th place as team so I would say it was succesful tuning. Now into autumn it was time to test some more CCM props (CCM11x7, 12x8 and 13x9) on different motors and 3, 4 and 6cells.

Beware when reading all my numbers that they might all have some detail you must pay attention to. First of all is type of battery. All batteries have different inner resistance and some of them needs to be heated to give full power. Some even sag a lot when they are not heated to above 25celcius. So choosing a worse battery or a very good battery will give you different results. It is not like one motor gives certain amps. A good indication on that is from test 245 compared to 252 where is used a different battery with the same amount of cells. That battery sagged a lot (voltage dropped) and gave a poor result. It is the whole system from total weight, plane type and setting, battery, contacts, motor, controller, propeller, spinner type that gives some climb rate. Another thing is weight of plane tested and height above sea level at the test.

The CCM props clearly performs up there with the best props and have well thought out pitch numbers for the F5J task. They are not under cambered and is wide enough to get things going

before they really grab the air. I also acquired a 30mm CCM spinner and together with the Prestige 30mm fuse the CCM 11x7 fits well. CCM 12x8 is not folding super all the way around but might be usable. CCM13x9 is not fitting with the CCM 30mm spinner. But I found the Vladimir spinners have slightly bigger yoke so I could use them. Also the more standard Vladimir spinners made it possible to use the CCM props on the 32mm Prestige nose. The way the props are designed they fit best with a “Z” yoke but can off course be used with a more standard straight Yoke from GM or similar. The reason for a “Y” yoke is that a high pitch prop will be more “flat” on the fuse. It should also be said that the spinner has a very clever and nice solution with inside screw to keep the spinner completely smooth on the nose.

After a comment on Facebook I tested the CCM 12x8 and the VM 12x8 on the Dualsky 3045-EG8 / Dualsky 65lite with strong 4s900 batteries. That is not something I recommend but the motor can take the power for 10-12seconds and that is enough to reach 200m with 1500g model in 8-10 seconds. BUT none of the components are rated for the 100A (75A during climb) you are pulling. So be very careful as some component will at some point fail. Especially testing on the ground, I also got a 25mm spinner and props for turning some older DLG’s into electric F5K models. But that is a different story.

So a small conclusion is that the CCM line of props (ccm.in.ua) is fantastic and a good choice for a proper setup. They work with both direct setups and geared setup and will give you confidence if mated with a good complete setup

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August/September 2022 – Dualsky XM3045EG-8

In Hungary at the European Championship F5J I received a Dualsky XM3045EG-8 motor for testing.

The motor is a «beefed up» version of the XM3040EG-9 and is heavier but should also take more power and more motor time before getting hot. The idea is that windy F5J models or even GPS light models up to 2,8kg could use this motor. My team mate happened to buy a used model at the the event so I borrowed him the motor and controller for use during the event. The motor were used for 20 starts before I got it back. Then I started testing it with different weights, props and batteries. The motor was installed in a typical 32mm nose for the Prestige 2PK F5J model and I used the Dualsky X-65-Lite controller as this has proven before to be a inexpensive but good controller. First tests were done with 1350g model and 4s650mah Tenshock battery

and 4s600mah Dualsky battery. For the heavier model test (2100g) I also doubled up with 2pcs 4s600mah in paralell so that the battery becomes a strong 4s1200mah 120C battery. This also confirmed my numbers using single 4s600 batteries.

Equipment used for the tests were:

Motor Dualsky XM3045EG-8 with controller XC-65-Lite.

Model Prestige 2PK light and F3J (1350g, 1500g, 2000g, 2200g, 3000g)

Batteries 3s650mah 75C Tenshock, 4s650mah 75C Tenshock, 4s600mah 120C Dualsky Alti nano/V4+, Unisense-E

Now after testing and validating the numbers I can say the motor performs just as it should. It would be a very nice motor for any F5J model or GPS light model on 3 or 4 cells. Amps during testing have been held under 65A but I think it can take a lot more as the temperature of the motor has never exceeded 50Celcius even after many tests in a short time period.

Test results is also in the Excel sheet is at the end of this document to compare with other motors.

GPS Light:

The Prestige 2PK is excellent for GPS Light class were max takeoff weight is 2598g (Vtail 2648g). So I ballasted the strong 130% F3J version (very similar to GPS version) to 2780g (180g more than allowed) and did some tests with the specially designed GM 10x6C.L propeller and C.L 32mm spinner (can be bought thru samba or dealers). It is specially designed for the 32mm Prestige nose cone to have very little drag and because it is a small propeller the drag is even less also sideways when folded. In GPS class there is no need for fast launch but it needs to be safe for launch in turbulent conditions and have enough power to do several climbs to <350m before you enter the course (searching for thermals). This test is therefore done with heavier and higher than allowed to be sure it is a good setup. Climb rate was on average 5,7m/s in turbulent air but stable thru-out many climbs/tests at 5,5-6,5m/s. Launching felt very safe with good acceleration. A total of 830mah was used to climb 500m.

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F3B/F3F/F3G model:

Put the Dualsky XM3045EG-8 motor in my Pike Precision 2 from Samba Model. Fit is excellent. Flew 4 flights with mostly aerobatics and using 800-1000mah of a 4s1200 pack (double 4s600 Dualsky). The motor got slightly warm around 50-60 degrees on the 2nd flight were is used 1000mah during 5min. Esc was Dualsky Lite 65 (did not get warm). It seems the motor is excellent for F3B/F model flying aerobatic fun or F3G competition. For sure can recommend this setup for such model.

Further testing with ballast and different propellers have also been done. Climb rate 12-15m/s at 2300g flying weight and 10-12m/s at 3050g flying weight. Using 11x6GM on 4S is possibly pushing the motor when using more than one climb. Heat was building up a bit in the motor.

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