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Radian - a new plane from Parkzone

Old 09-24-2010, 04:10 AM
  #876  
TM4197
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HAPPY BIRTHDAY TO ME!! Well, at least I got a "hand shake" from my wife that she would get it for me. Wait a minute.......the last hand shake I got from her lasted 20 seconds....

I better get a memo signed by her instead!!
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Old 09-24-2010, 04:14 AM
  #877  
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Gohmer,

Not sure why your motor is so bad. I have run the dog crap out of mine, 95 degree days, dirt in it....rained on it. Its running fantastic. Better than all the same size motors Ive gotten from other companies. I've carried some cameras bigger than 10 oz...no problem lifting and still thermals well.
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Old 09-24-2010, 01:55 PM
  #878  
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I wonder if they'll do a wing set so current owners can have best of both worlds
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Old 09-25-2010, 06:27 AM
  #879  
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Default Thermal #2

It was bright, clear and relatively calm today and I found my second thermal. It was pretty gentle; the plane didn't go up so much as refuse to come down. After 20 minutes, my neck just couldn't take it any more!

Again, I saw no overt signs of a thermal, nothing to clue me in that I should fly over here rather than over there, but she stayed up there for a good long time. I'd post video but it's pretty darned boring: the same scene circling gently past for 15 minutes or so.


Last edited by mclarkson; 09-25-2010 at 06:45 AM.
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Old 09-25-2010, 10:04 PM
  #880  
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Why do the amateurs always use red and black? The green and blue scheme was hideous enough.

Steve
www.thunderbolt-gallery.com
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Old 09-25-2010, 11:54 PM
  #881  
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Because they like it?
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Old 09-26-2010, 01:29 AM
  #882  
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I like it! It would be neat if they would sell alternative decal sheets with predesigned schemes. But I'd say they did an OK job on this one. I'd be far from embarrassed to fly one.

Maybe they just take ugly photos. I had problems keeping my meal down when I looked at a photo of the Night Vapor on Horizon's website, but on seeing one in person at the LHS I didn't think it looked bad at all.
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Old 09-26-2010, 02:53 AM
  #883  
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Some people like all white with the letter "D" and tail numbers on it. LIKE a million other sailplanes. I know, I have some DG 300 and 1000's with the same git up. I like both color schemes on the Radian. And wow, you can peel them off..and change it to all white with a letter "D" on it, or make it pink, or blue or whatever.

Nice pic Mclarkson...looks like you have plenty of different shades of color there, should start up some nice thermals for you. Just keep crossing over between the two shades, you'll see the bump when you do....most of the times!!
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Old 09-26-2010, 03:09 AM
  #884  
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[QUOTE=mclarkson;752709]It was bright, clear and relatively calm today and I found my second thermal. It was pretty gentle; the plane didn't go up so much as refuse to come down. After 20 minutes, my neck just couldn't take it any more! " Great job Mark!!!!!!!
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Old 09-26-2010, 11:58 AM
  #885  
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Thanks, all. I'll be out there trying again as soon as I can.
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Old 09-27-2010, 02:56 PM
  #886  
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Subject: Gliders - Tips on finding Thermals

I may have posted this before, but it should be helpful for all you new
glider guiders, whether those gliders have motors or not.



Finding Thermals
by Ed Anderson
aeajr on the forums

A thermal is a column of warm rising air that occurs when one section of
the ground warms faster then other sections. As the air raises it draws in
more air. Think of a very slow moving tornado or a water fountain. Not
exactly correct but close enough for first approximation.

http://www.apogeerockets.com/educati...g_thermals.asp

What do thermals look like?
http://www.flyaboveall.com/mountain...ermalclinic.htm

TIPS ON FINDING THERMALS

The best conditions are calm air, hot sun and low humidity. Some big dark
areas surrounded by lighter areas will help to create thermals, so look to
see if there is anything like that on or around your field. A freshly
plowed field is good. A parking lot works great! A large building
with a black roof is awesome.

However I have caught thermals at 35 degrees F in 15 mph winds. They can be
weak and they move fast, but the are there!

Thermals: Collectors, Wicks and Triggers
By Will Gadd
http://www.gravsports.com/Paraglidin...s/thermals.htm

Here are some thoughts on the hunt!


LISTEN WITH YOUR EYES

Get your plane up high, the higher the better. A long hi-start can get you
400-600 feet up which will give you several minutes of glide if you don't
find any lift.

If you have a motor, cut the motor and trim the plane for nice level flight.
Now, focus on watching the plane and keeping it on a nice steady glide.
Steady as she goes. Try to keep your hands off the sticks as much as
possible.

Let the plane ride with and across the river of air, giving it only
occasional input to keep it going in the general direction you want to go,
but don't be a stickler about it. Let it drift like a fly on the surface of
the river, waiting for a trout.

If you listen with your eyes, it will speak to you, but you have to listen
patiently.

Glide across the wind, not directly into it and not with it as it can be
hard to see what the plane is doing when it is going directly away from
you or coming directly at you. Sort of a 45 -60 degree angle left for a
while then a 45 to 60 degrees to the right. Nice and slow and easy.
You want to cover the sky and search the moving river of air, like a
bird looking for food.

As you are flying, watch the wing tips the nose and the tail. If a wing
seems to bump up, or if the plane seems to become buoyant, floating up for a
moment, it could be a gust, or you might have just brushed a thermal. Go
gently into a slow turn in the direction of the wing that rose. Thermals
will try to push you away. If you see the plane come up for a little while,
then drop a few seconds later, you may have gone right through the middle
of the thermal. Turn gently to circle back into it. It will be moving with
the wind, so don't try to keep the plane in one place in relation to the
ground. As you work thermals it is natural for your plane to travel down
wind as you circle.

Try to make a circle, but not too tight or you will lose too much altitude.
Try for about a 100 foot diameter at first. Complete a couple of turns
and see if the plane seems to be rising at some point in the circle. If it
is, just stay with the turn and try to find that area where it rose, the
start to focus the plane into that area. If you find the rising air you
are trying to keep the plane in that air column. If it is rising you can
apply a little up elevator in your turns, but not much. You don't want
to stall and you don't want to scare the thermal, you want to bond
with it.

Try to observe if the plane is rising steadily, or if it seems to rise and
fall. That could mean you are not centered in the thermal, so work your way
more toward the side of the circle where the plane rises.

Remember that thermals move with the wind, so you are not trying to stay in
one place in relation to the ground. The air is like a river and you are
trying to stay in a little whirlpool that is moving with the river.

If you go into the turn and make a couple of turns with no success, then
just resume the search pattern I mentioned. Angles across the wind. Not
into it and not with it.

A sailplane in lift - This is an AVA 3 M sailplane. The AVA is a high end
competition glider, but just like the Radian, it has R/E controls. It is one
of the best planes of its type on the market, but you fly it just like you
fly the Radian. I should know, I have one of each.

Notice he is hunting, then he hits!
http://www.rcgroups.com/articles/lif...r/ava/Ava2.wmv

As you watch the video, notice the light poles to help judge the height gain.
Notice how the glider tends to drift from right to left. He is circling more
than usual as he feels he has lift in the area and is trying to find the center.
That is the direction of the wind. Using the tops of the trees as reference
you can see that he is rising.


If you are getting out too far, work your way back the same way, angles to
the wind. Remember it will take longer to go up wind than down wind and
you will be losing altitude all the time, if you don't find lift. Fortunately a
Radian has a motor so if you missjudge and are going to fall short of the field
you can put on 1/4 throttle to help you stretch for the field. This is something
pure glider guiders can't do. That is part of what makes pure gliders so challenging.

Finding elusive thermals
http://f4bscale.worldonline.co.uk/Thermals.htm

Unless you hit a boomer, you are not going to immediately know you are in
lift, so you have to watch the plane. Sometimes it becomes apparent because
you realize that your not sinking but appear to be holding altitude. The
only way to do that is to be in lift.

Remember also that thermal can vary in size and intensity. Some are fairly
narrow and some are so large that it seems a whole region of the sky is
in lift. I rode one area recently for 58 minutes where it seemed about 1/4
of the field was in lift. In this case, I didn't really have to circle. I
just flew back and forth and the plane rose beautifully. Those are really
nice, when you find them.

It is a hunter's game, if you are up for it.

Good luck pilot! May your hunt go well!
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Old 09-27-2010, 06:48 PM
  #887  
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Originally Posted by mclarkson View Post
It was bright, clear and relatively calm today and I found my second thermal. It was pretty gentle; the plane didn't go up so much as refuse to come down. After 20 minutes, my neck just couldn't take it any more!

Again, I saw no overt signs of a thermal, nothing to clue me in that I should fly over here rather than over there, but she stayed up there for a good long time. I'd post video but it's pretty darned boring: the same scene circling gently past for 15 minutes or so.
Damn, Kansas is flat indeed! I lived in Oklahoma for about seven years, and they actually had signs on the road when you came to a hill.

I reckon in case you wondered why your car was suddenly pitching upward....OMG, WTF honey, our car is lifting off, ahhhh...oh thank God, a sign. Oh, mercy me, It was just a hill...woo! Pass me my heart medication sugar!
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Old 09-27-2010, 09:11 PM
  #888  
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Thanks Ed, I've seen that one before somewhere but it bears repeating here because it deserves exposure to newer fliers like us.

Hey, I heard it's impossible for a dog to run away in Kansas! It's so flat you can see them for three days.
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Old 09-27-2010, 10:38 PM
  #889  
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It is pretty flat out here.

I'll keep at it, of course. Bright, calm, dry days are pretty rare here, but that does describe both of the days I've caught them.
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Old 10-02-2010, 10:37 PM
  #890  
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Default Help me!

Was flying my Radian yesterday when the motor "coughed" a couple of times.
After a few minutes it just stopped and I landed.
Started again for a ground test and it was running erractically, then I saw smokes flowing from the canopy!
Openned, disconnected the battery and the ESC was burning hot!
Then I noticed a light grey wire coming from the receiver was touching the side of the ESC and probably caused a short.
Any help?
Is there any other ESC that I can put in place of the original one whithout any hassle?

Thanks a lot from a desperate beginner...

Doug
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Old 10-02-2010, 10:57 PM
  #891  
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Originally Posted by doug773 View Post
Was flying my Radian yesterday when the motor "coughed" a couple of times.
After a few minutes it just stopped and I landed.
Started again for a ground test and it was running erractically, then I saw smokes flowing from the canopy!
Openned, disconnected the battery and the ESC was burning hot!
Then I noticed a light grey wire coming from the receiver was touching the side of the ESC and probably caused a short.
Any help?
Is there any other ESC that I can put in place of the original one whithout any hassle?

Thanks a lot from a desperate beginner...

Doug
Check the wires from the motor to the ESC to see if they are rubbing on the motor. Gray wire from the receiver is an antenna, shouldn't hurt anything just touching the esc.
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Old 10-02-2010, 11:12 PM
  #892  
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The motor rubbing the wires is a likely culprit.

You can always get a factory replacement for minimal hassle:
http://secure.hobbyzone.com/catalog/.../EFLA1030.html

That page gives the specs which should make finding a replacement easier. Best of luck getting it back up in the air.
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Old 10-03-2010, 01:33 AM
  #893  
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Thank you!

So you think my brand new motor is toasted as well?
The only thing I noticed was the burning ESC when I openned the canopy, it even slightly damaged the inner fuselage.

Doug
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Old 10-03-2010, 02:09 AM
  #894  
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+1 check the wires. Motor can rubbing on them may have caused the short.
The gray wire is antenna an unlikely to have caused harm.

Motor 'may' be OK if the wires inside did not get hot. Shrink insulate and test BRIEFLY on a known good ESC. It should run IMMEDIATELY and properly. If it jerks and jitters it's shorted out > STOP! If you don't you fry another ESC.
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Old 10-03-2010, 02:22 AM
  #895  
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In other news, I successfully rudder-rolled my Radian a few times and flew her upside down for a bit (out of a loop, not a roll.) It requires FULL down elevator to keep her in a gentle dive, though. Is my CoG too far forward?


p.s. Here's what happens to your Radian when the motor rubs through the wire insulation.
http://www.vimeo.com/9723922

Last edited by mclarkson; 10-03-2010 at 02:27 AM. Reason: spelling
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Old 10-03-2010, 03:50 AM
  #896  
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Originally Posted by mclarkson View Post
In other news, I successfully rudder-rolled my Radian a few times and flew her upside down for a bit (out of a loop, not a roll.) It requires FULL down elevator to keep her in a gentle dive, though. Is my CoG too far forward?
Yep.

Mine flys inverted with about 1/4 to 1/2 down elevator with about 3/4 throttle.
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Old 10-03-2010, 04:08 AM
  #897  
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Been doing it at 0% throttle. I think throttle would make it much worse, as the plane really pulls "up" under throttle.

Time to experiment with coins on the tail, I guess.
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Old 10-03-2010, 04:18 AM
  #898  
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Thanks!

What if I test the motor plugging it straight to the LIPO, without having an ESC between them?

Doug
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Old 10-03-2010, 05:28 AM
  #899  
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Originally Posted by doug773 View Post
Thanks!

What if I test the motor plugging it straight to the LIPO, without having an ESC between them?

Doug

Dangerous, risky, and foolish. The instant its plugged in, that motor will be at full RPM. It wont care what is in the arc, fingers, tools, clothing.... it will be a hungry beast searching only to cause destruction.
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Old 10-03-2010, 05:34 AM
  #900  
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Nitro Blast is correct....its risky. But, if you do not have a ESC, stay clear of the prop, clip the neg wire to the motor neg wire..and just touch the red wire to the motor red wire. Its either going to spin or not. I have done this without loosing anything, just make sure everything is clear of the prop, an don't hold the wire on longer than to see if the motor spins. Make it really safe?? TAKE THE PROP OFF! REALLY BE SAFE? get another ESC. Your call.
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