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I just picked the right day!

Published on May 7, 2012, in Gliders.

The weekend was not much to write about, but I was lucky to have the day off. The morning produced some nice thermals, the kind of stuff that makes you very scared! This was my first flight above 300 meter, and actually touching 400! This is when planes get really small. I was flying under a white cloud, which gave me enough contrast to see, but against the blue sky, I was having a hard time keeping the plane in sight. Coming down out of the thermal was a hairy experience, I thought best to fly long decending passes. With the GPS switched to speed, I could keep things nice and steady and still come down. Around 100 meters I picked up the next thermal, this one even stronger then the previous one. The decents near the top are not me falling out of the thermal, but actually deliberately pushing down, to get out of it! As soon as I would let go of my elevator, it would jump up like a home-sick angel.

Max speed was a nice 110 km/h. I did add some gravity to the nose end, it does make staying in thermals a bit easier.

(just notice that the time that logview shows is not right, the flight was around 11-ish.)

 

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No more bleeps and all is very well indeed!

Published on March 17, 2012, in Models.

 

Pictures tell a 1000 words. Not only do I now have a working Radio system, even my gps is working! What more does a man want?

Some data I gathered: max altitude I was flying was 220 meters, more fun was the max speed I clocked: 130 km/hr. And I did not even push it hard! All in all there was not a lot of thermal activity today, no buzzards, no sun, mostly grey clouds. There appears to be a slight offset in the gps data, I really did take off from the field and did indeed land where I should. Tomorrow it’s not so nice weather, I might get some time to play with this google-earth thingy..

As to the bleeping bleeps: did not have time to check anything other then de battery and that’s absolutely fine. So, onwards to the rest of the electronics. Suspecting bad caps somewhere now.

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What the Bleep is going on?

Published on March 16, 2012, in Models.

Referring to the previous posts, you might know I have a wee bit of a strange problem with my Orion. Glider goes up, couple of seconds into the launch I appear to lose control, switch off the motor, control is reestablished, and much enjoyment is had for the duration of the flight.  I have the timer set up to count down from 10 seconds, so that’s 10 beeps, and be silent for the rest of the flight.

So, the first steps in solving the problem is trying to replicate it at home. I set up another Rx, so that I had two systems running in parallel, figuring I would then be able to see if the problem was tranny side or receiver side. Of course it did not happen all the time. After an hour or so, of continuously running the motor for 10 secs, I all of a sudden started to notice a pattern! The back of the tranny was removed to be able to observe the status leds of the Tx module. Did I just see something flash Red there?  After a while, it became clear, that indeed, every time I turned off the motor on the 10 sec mark (beeper), I would see the red flash. Then, as the tranny battery got lower, I got the impression, that the red flashes started to occur, every time I heard a bleep.

Eventually, with lower voltage in the Tx, I could indeed see that the Tx was losing it, everytime there’s a bleep! What appears to happen is, the Tx module resets itself, Rx goes into failsafe to be sure, and everything recovers when the bleeping bleep stops bleeping. Maybe I should be more specific: The Tx module could also loose the input signals because the rest of the electronics is confused. The red light might not mean a glitch on the power, just that is does not have sensible data to transmit!

Ok, now that I have the symptoms, it’s on to the cause. First thoughts are a bad battery, but there could be other bits of electronics that can cause something funny. For the weekend, I will probably change to a new Lipo, and turn of the beeps to be sure to be sure.

Of course I already had rejigged the stuff plane side to run the gizmo’s on their own battery. It all fits, but it does come at a penalty of another 73 grams.

Life is fun, and it’s Friday. What can go wrong?

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It was a great day, but there’s a dark cloud somewhere..

Published on March 11, 2012, in Gliders.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

During the previous flights I had noticed something funny going on when launching the Insider. It seemed as if the controls more or less froze when going up. So far I thought it was just me, having to get used to things. Today however, I got some more ‘experience’ with this. It indeed appears to be happening that once the motor is on, all communication with terra firma is lost. As long as things point in the general direction of ‘up where the buzzards fly’ all is fine. When it starts to veer of course, things get hairy. Luckily it ‘only’ appears to take a second or 2 to regain control after switching of the motor (that works, so my Rx must be listening, what’s happening?), but it sorta scares me a wee bit. Enough to start worrying about lots of things that could possibly be wrong. My first thoughts are of course ‘power’. I’ve got 6 digi’s in there, so they will be hungry. Measuring on the ground I never got past 2 Amps max, as far as I could work out, a ‘safe’ value. To be sure to be sure, I read out the loggers just now, and the noise on the power as seen by the Rx is never more then 100 mV, acually, more like max 75 milliVolts on all the recorded flights. (which include all the settings up sessions). The excellent Logview program tells me about this last session of the day:

  • Rx Voltage:
  • Maximum value: 5.639 at position 123,
  • Minimum value: 5.6 at position 1016
  • Range: 0.039 milliVolt
  • Average: 5.63

I don’t think I can expect any better. So, much headscratching must follow!

But some good stuff as well: 10 sec power does give me approx 100 meter launch height, which is nice. Going up at 8.5 meter/sec is not bad. Even with the initial flap settings, I go up with the local buzzard. (nice bird, tells me where to go. With the Blaster I would not be able to get near him/her, but now it’s easy)

Annoyingly I don’t have a spare Rx handy that fits the fuse, and I did not have a way to record the pulse going to the motor controller. (which I will fix now) That way I would hopefully see if there is a correlation between power on and ‘something being lost’. Mounting an additional battery, is of course a good idea, just not easy to implement in the very confined spaces available. Anyway, other then that is was an enjoyable day.

..will be continued!!

Kees

 

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Second Insider outing, cold and grey..

Published on March 10, 2012, in Gliders.
grey skies, stiff brieze, not very warm.

..but who cares, it’s almost spring. The breeze was a bit stronger this time. Today’s goals were getting the climbout sorted. I have now reduced the timer to 10 secs, and get approx 100 meter out of that. Thermals were not to be found, but I still easily managed 8-10 min flights. I’m impressed with that. All in all I spend almost an hour in the air on 6 launches. I’m going to adjust the landing setup, for I feel more comfortable with a higher landing speed, and not pulling flaps till I’m almost home. Just like flying the Blaster, come in hot, and hit the brakes for a nice soft setdown. Floating about with a bit of headwind just blows you all over the place. For that to work, I need to increase down el mix. Works in progress.

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NAN-Orion/Insider: up she goes…

Published on March 6, 2012, in Gliders.
10C, light breeze, just perfect for a perfect maiden flight.

First flights of 2012. After what seems like a long hibernation, I finally found myself at the right spot at the right time with the right toys. Temp around 10C, light breeze, broken clouds, and a dry-ish field. The buzzards were out already, so lets go!

As these things go, the preparation at home seems to have paid off. 1st flight, a bit nervous (me) but she behaves well, don’t touch flaps, just a few circles to get a feel for it. Feels slightly noseheave (at 106mm CG) but safe. Landing is uneventful. 2nd flight, keep the power on till it beeps (12sec) Altitude approx 80 meters (guess). Again, nothing funny, just flip over to thermal settings. no trim change, no nothing. Speed mode, same nothing. Flaps 1/4.. all good. Half flaps, still fine, just slows down nicely, with nice nose down attitude. Flaps all the way, gives me crowbrakes. Yep, it does stop! You sure need to remember not to do that low, because it will fall like a brick! Ok, funny stuff over and in for a nice landing, with approx 1/8-1/4 flaps. Do remember to push the spoilers all the way up (as in full power for you average noisy plankflyer) before you get too low &slow. 3rd flight. Ok let’s see the climbout now. I measured approx 450 watt on a fresh battery charge, it’s not like a rocket, but certainly not bad. With some tweeking I’ll get to 100 meters in 10 secs. Given that I seem to use approx 100mAh each time I go up, I have ample room to play with power/props/times. It has a 19*8 up front at the moment, going to a higher pitch will not harm! Anyway, back to the present. 3rd flight, lets try some speed. With flaps at neutral, just push it down. And yes, it does pick up speed, but nothing too bad. There’s quite a bit of whistling though, likely the clevises on the wings. After a few more circlings(tm), back to earth. This time a bit more confident with flaps, in for a nice slow landing. 4th time. Trying to find a bit of rising air, but not much luck yet. I need to play with flaps a lot more before I get the best settings. After 4 minutes or so it starts to drizzle, and I call it a day. This time I pull the flaps on the outskirts of the field at approx 30 meters, and a nice relaxed slightly nose-down decent follows. Again, at approx 2 feet, let go of the flaps, to pick up a bit of speed for the final flare. Back at home I put back 450mAh into the battery, that’s roughly 100mAh per flight. With a 3300 pack, that will give me plenty to play with. I have one of these 3300 Turnigy Nano-tech packs in it, I can charge them at 10C = 30 amps. My charger does not go that far, but if in a hurry, you can surely get back in the air soon. For the moment I’ll leave the other packs unused, I doubt I will need to swap them at the field. Finding a 4S pack that fits the fuse will be high on the agenda, but so far I have had no luck.

As to all the usual ‘stuff’: I upgraded my tranny to a newer version of the ACT-modules I’ve been using for some time now. This one does support telemetry. (as if I need that) but the real reason was that I needed an 8 channel Rx that would fit into the fuse. All the movements are provided by MKS, darn’ expensive and heavy, but boy, not having any slop on your moving parts is worth it! Ailerons are fitted with Hyperion 09′s, there was no room for anything else.

All in all a very nice model, with lots of potential for a loads of good playtime! So far I have re-learned a lot about setting up the Tx, and even though I thought I knew all there was to know about a MC4000, I now realise, I did not know anything yet. Many thanks go to Mike Shellim at RC-soar for figuring it all out!

kees

Some links to remember who supplied all the stuff.

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Field has sunk..

Published on January 8, 2012, in Field.

Flying field? did it sink? No, it’s actually nature’s way of cleaning up!

(And yes, the water rose another meter after this.)

It happens most winters, when the Rhine is full, we get the excess.

 

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Summer is still here!

Published on September 29, 2011, in Models.

Enjoyed a wonderful afternoon at the field, it was so hot even the Yak needed an umbrella to keep it’s cool!

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Summer in Zevenaar..

Published on June 27, 2011, in Models.

Just a few quick shots, the weather is too nice to sit indoors! Today we are expected to suffer from temperatures reaching 30C. Life is bad.. ;-)

 

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Big SU

Published on June 12, 2011, in Models.

Spotted this on Richards Picasso.. Looks like mr Poots was making one of his famous test flights. For the un-initiated that means in general: wring it out at grass-top level on the first tank of juice..  Good luck!

Here’s the rest of the pics and all that goes before the first flight: is over here on AerobaticsNI.

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