25-Jun-24 - 06:55 PM

GPS Triangular Racing - GPS Triangular 3

Written by Hayden Daley - 01 May, 2024.

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January/February 2021 – Tenshock 1510A01-04

4 new motors and 2 controllers arrived. This is final version motors I think. They made the gear parts more solid and have winded a couple more versions (3550, 3950, 4650 and 5000kv). All have the same gear. The new controllers are 2-4 cell with a beefy 10A BEC. First impressions on logs is a very stable BEC voltage.

Both controllers (TS AX40) and motors (Tenshock 1510A01 to 04) have been tested a lot of flights and well above max what specifications said was max. They seem to be very robustly made and can cope with long endurance. I will open up the gears and check for damages at a later point but no noise changes have been heard during testing and no over heat or smell from windings have been observed. They are for sure good combinations. A new TS AX60-PRO is also released now for those that wants up to 6S / 1000watt setup.

Not many starts yet and temperature is low outside. So beware that there are some uncertainties as even when I heat the small batteries to 25-30 degrees they can be much lower before I manage to start the model. One could heat to 35-40Celcius and they do give more power this hot. But I try to not push them too far and instead try to show what we have in a normal summer day. I could do tests also with high temperature batteries but I have to draw the line somewhere on how many tests 

Some of the tests is done with 6S and 8S batteries as these motors can easily cope with the higher voltage with correct props. So beware the columns showing what battery/props is used.

These 6S/8S tests are not done with the Tenshock controller but a castle edge lite50 (Timing at 6degrees) and a Dualsky 6S controller. Now a new 6S/1000watt Tenshock is released that should be excellent for those bigger power setups.

Probably my motors will not be run much on more than 4S setups (4cells series) as testing have proven 4S is plenty power for F5J use or fun flying.

I have also included a new propeller that is made by Solidtec (design by Julian Benz and sold thru servorahmen.de ). It is just called A1. Max rpm is 11000 and max 1900watt. Weight 6,6gr.

Propeller is made from carbon fiber reinforced plastic by injection molding. It is an interesting material if mixed correctly. We know Solidtec is good at this from the servo frames they also produce. But care should be taken after landing hard as always. Landing tests have to wait for spring time as I have only snow and ice now ??

The propeller seems to be performing well and I have done some tests with different motors (see excel sheet below). It also corresponds with the producers own tests. Small differences is probably battery temperature and battery type. Timing can also do differences.

May 2020 – Tenshock new motors

Sooo.. another update and why some of you might be interrested.

As many know I have been doing motor/prop/battery testing sincec winter. Not really scientific but good enough so I can be confident on my motor combos. I have off course no time or money to test all out there but a selection of what i have or got. This time the update is after I got some new Tenshock motors. . They have made their own gears and two new motors specially designed for F5J 3 and 4 cell setups. Looking nice, good weights and a nice feature of motor front screw that means you will not destroy it by using too long screws. It also has so many holes that it will fit even if you have used 3 screw reisenauer before. Just make some new holes and one can switch back and forth.

The motors run very quiet and together with some quiet props you are almost stealth compared to some others ;-)

I dont think I have found the best setup yet as I have only reached 13m/s as best. But forward speed is decent for windy conditions (Reaching 5-600m forward in 5-6m/s wind). I might want to use the 3S motor with 4cell?.. Need to complete more props before I do that as it is more than it is spec'ed for.

On my motors there are some improvement points that I think they will adresse. They had forgotten to put some loctite on the gear case and I think the later produced shafts will be "D" connection. We pilots like very fast start and hard braking. That is hard on the gears..

So a small conclusion on these two Tenshock motors:

Quiet. Runs smooth and within specs they do not get too hot.

Design and fit is good. And it fits small fuses that had previously had other screw holes. Performance could be better for heavier models. 2kg and launching to 200m far forward is ok but not more. Might be different view when/if I do more testing. Using more cells than spec might probably be good as rpm on gear is not at max (speced 70000rpm)

Assembly gears had some faults that they should have fixed on later deliveries (I got early birds).

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March 2020

So time to release all my test results.. though I am far from finished  

In F5J your means of start is a motor and 30seconds to use that. You want enough power for 30seconds but also some extra for practice and an hour of two flying. We dont want to getvas much altitude as possible because the lower we launch and fly 10min the better score we get. Over 200m we get extra penalty so to use the 30sec motortime properly is important. Last year I started to use some really small and powerful 4 cell batteries from Turnigy. They have been great and one can push them far even cold (some increase though heated)

Last year I used several different gear motors but I was fairly impressed by the cheap AXI 2217/12 v2 Long that gave me some good results in competitions even at 2100g flying weight on my Prestige 2PK (empty weight 1250g).

So I bought 2pcs of the brother 2220/12 long and upped the power to 4 cells after some messages from the producer this was possible (30A continious and 35A short term no issues). The reason for 2 was to use it over the limit and possibly burn it. It has not yet burned though it has been warm (upwards of 60A/30sec) Results have been good but also not so good deppending on propellers. So I ordered a lot of different propellers from different producers and also got my hands on some new smaller GM props (Georgi Mirov) https://www.gmpropellers.com/ he sent me for free. Result after many props is that this is a very nice and cheap alternative to a geared motor. No gear to break, 4 cells means temoerature of battery is not so important and the props are smaller = less drag.

Then a second motor came in that was interresting. Ivan Horejsi from https://horejsi.cz/ suggested sending me a Dualsky motor designed for our purpose for free.

Motor is outrunner but with case so there is no outside can turning and the motor wires out the back. Dualsky XM3040RG-9 was the cryptic name as part of a series newly developed motors from Dualsky http://www.dualsky.com/motor/67f3bf8a-9b1d-266d-41e6-8960fc50f8ee.shtml

First test was fantastic so I bought 2 more in the local hobby shop to also with these try and find the limit. With this motor I could also install a temperature probe on the case and monitor it thru the telemetry.

I also bought two pieces of the new Aerobtec power sensor so I could log amperage together with the Alti altimeter, This meant I had full control of initial power and thru the full climb phase of a typical F5J start.

So what am I looking for? Well most F5J starts end up in 100-150m and you know were to start searching. But sometimes the thermals are low and strong so you need to use the 30seconds to search in low altitude for 20sec with motor on 1/3 throttle or even lower. Then if you dont find it you might want to climb 100m the last seconds. That again means you want a fast and powerful climb for 5 seconds in worst case.

Another case might be the wind speed is high and you want to reach a treeline 500m in front. You then need to fly faster than the wind forward and also climb to whatever height you feel neccesary in those 30sec. Here an outrunner (or innrunner) with small prop have an advantage as it often runs on higher rpm with the same pitch as their geared counterparts.

The motor combo also needs to perform with full ballast and it would be nice if it is so light one consider it in the lightest models were you try to save every gram. Most tests were done with 1650g windy Prestige with some tests full ballast and some speeding forward.

Looking at the results I put into an excel sheet I find extreme values both on AXI and Dualsky motor but I also want the motors to run for many seasons without service so it is always nice to take a step back. Motor effieciency also goes down when using a "too big prop" so sometimes it is no point in going bigger prop just for a few % better performance.

As a results of all this testing (>100 logs with many of the multiple climbs. many for double testing) I am happy to say both AXI2220/12 long and the Dualsky XM3040EG-9 perform well for F5J flying as I see it.

The Dualsky XM3040EG-9 have really performed the extra mile as it has never been above 34Celcius temperature on the outside and performs above 15m/s climb if you want.

All tests have been double checked with 30sec first climb and then extra climb(s) on same battery so that any heat build up will show and simulate summer conditions/worst case.

I am still waiting for some new propellers and spinners (VM and GM) to tweak and also to get the best aerodynamic nose. Flying F5J means flying a lot slow and also a lot sideways (sideslip) in the wind. So drag is important. More on that later.

So for propeller I am now currently "in love" with the new GM small series. Very little sound and it seems to outperform what I had available of props.

Gear:

  • Plane is Samba Model, Prestige 2PK windy designed by Philip Kolb (1650g with F3J tips). 32mm nose cone (new 30mm nose just barely fits the Dualsky but needs sanding or cutting to 32mm)
  • Battery: mostly Turnigy 4s650 75C and 3STattu R-line 4s850 95C
  • Controller DYS40 mediumhigh timing for outrunners and Tenshock/Castle/Dualsky on geared motors
  • BEC CC10A used for the DYS40
  • Altimeter/powerlog Aerobtec nano and powersensor. For range test the Aerobtec GPS was used as extra logger.
  • As a backup I read and log also most data on a Unisense-E from SM-modelbau
  • Tx and telemetry JR XG11

All results from my excel sheet here (pdf) http://www.jojoen.no/div/2020testingmotor.pdf Edit and disclaimer: to all of you following.. i am doing all these tests to find something that

works for me in any condition with any weight in my models. Dont expect the exact results if you change something. An example of this is todays GM11x6 that uses around 50A on this Dualsky setup. But i also see that warmer battery makes higher amps. A bigger battery with same C will outperform the battery i use and that means you will draw even more and "might" be too much for the motor. A second climb almost always gives better climb because of heated battery. So I have tried to discard those but oftem perform them to check. I also might need to go thru the logs again to recheck. There might be things that went wrong (example one bad battery of the 12-15pcs I have)

That is why my favourite is not the propeller that gives highest climb. It should also fit fuse for less drag and be a good setup in both cold and warm weather (warmer/colder batteries). And i want the setup to last many seasons.

These test have been performed without any sponsorship. I have had one motor and some props sent to me but I have bought most of it with own money. Though the testing have sparked producers sending me stuff i try to not get influenced in the testing.

Jo Grini

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