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Old Sep 20, 2012, 05:24 AM
Gravity impaired
jrjr's Avatar
United States, NY, Wolcott
Joined Nov 2004
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Originally Posted by JumpySticks View Post
Try that with a stiff CF bird.
Try 200mph with a RP!
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Old Sep 20, 2012, 06:28 AM
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Danny_l's Avatar
South Africa, WC, Cape Town
Joined Oct 2011
414 Posts
OK,
This is what I've done so far:
  • ESC brake set on soft braking - check (it was already set like that)
  • All control surfaces neutral - check.
  • Camber and Reflex progammed - check (flaps and aileron movement = 1 trailing edge thickness)
  • Crow programmed
.

With 1800Mah battery the CG is at 77mm. (no weight added anywhere)

The whole tail section is very flexible, so I think I should do at least the arrow and CF stiffening mods before flying again, but I'll not touch the Horizontal Stab incidence for now.

Any other suggestions?

Thanks,

Danny
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Old Sep 20, 2012, 07:05 AM
Registered User
United States, TN, Johnson City
Joined Jul 2011
185 Posts
Quote:
Originally Posted by Danny_l View Post
OK,
This is what I've done so far:
  • ESC brake set on soft braking - check (it was already set like that)
  • All control surfaces neutral - check.
  • Camber and Reflex progammed - check (flaps and aileron movement = 1 trailing edge thickness)
  • Crow programmed
.

With 1800Mah battery the CG is at 77mm. (no weight added anywhere)

The whole tail section is very flexible, so I think I should do at least the arrow and CF stiffening mods before flying again, but I'll not touch the Horizontal Stab incidence for now.

Any other suggestions?

Thanks,

Danny
Not necessary. IMHO you should go out and see if you can resolve the gliding issues that I think you said was your big dissapoinment. Stiffening the fuse really won't change that.
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Old Sep 20, 2012, 07:12 AM
Tossing planes into the snow
Canada, BC, Smithers
Joined Nov 2011
2,924 Posts
Quote:
Originally Posted by Danny_l View Post
With 1800Mah battery the CG is at 77mm. (no weight added anywhere)
I am amazed that you could get it to balance at that location with an 1800 battery and no weight on the tail. I tried an 1800 once and the plane definitely moved faster and came down faster. I wouldn't want to use a battery that size unless it was really windy. If you can get your hands on a 1300 it will flatten the glide ratio and float much better. On mine, I had to set it to a hard brake to keep the prop from windmilling.

The next step is to set all surfaces to neutral and take it out on a calm day. Don't worry about what it does when under power, but just adjust the elevator trim so that it glides hands-free without porpoising. Doing the mods will make the controls more responsive, but they will not help with the high sink rate that you have been experiencing with the big battery.

Jumpy...
Yes it goes in where the FG was. You have to remove that FG "stiffener" and hold it in your hand to truly realize how useless it is. Then compare that to the arrow shaft, widen the slot to fit the arrow, glue and enjoy. I was tempted to remove the other 2, but the plane is nose-heavy anyway, so I left them there.
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Old Sep 20, 2012, 07:21 AM
Bye Bye VP Aug 2010 - Aug 2012
Gerry__'s Avatar
United Kingdom, London
Joined Jan 2005
5,933 Posts
Quote:
Originally Posted by Danny_l View Post
OK,
This is what I've done so far:
  • ESC brake set on soft braking - check (it was already set like that)
  • All control surfaces neutral - check.
  • Camber and Reflex progammed - check (flaps and aileron movement = 1 trailing edge thickness)
  • Crow programmed
.

With 1800Mah battery the CG is at 77mm. (no weight added anywhere)

The whole tail section is very flexible, so I think I should do at least the arrow and CF stiffening mods before flying again, but I'll not touch the Horizontal Stab incidence for now.

Any other suggestions?

Thanks,

Danny
Don't worry about it, it's not a 'must do' mod. Some people are over anxious with the fact that foam flexes.. The RP's natural state is to glide around as slowly as it can, without abrupt control inputs, occasionally darting off in a straight line towards areas of suspected lift.
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Last edited by Gerry__; Sep 20, 2012 at 09:47 AM.
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Old Sep 20, 2012, 07:43 AM
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Danny_l's Avatar
South Africa, WC, Cape Town
Joined Oct 2011
414 Posts
Hi,
thanks for the responses.
Well, I'll leave it all as is and try it.

The upside of using arrows for stiffeners is that both my son and my wife are into archery so I have a steady supply of arrows that are no longer useful due to small cracks etc.

I'll also see if I can scrounge a smaller battery.

Brgds,

Danny
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Old Sep 20, 2012, 08:06 AM
Tossing planes into the snow
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I get a great deal of pleasure out of making things work a little better than they did out of the box. It is a simple matter of receiving a reward for some extra effort expended. I don't consider that to be an obsession. As the owners of these planes, we should feel free to modify or not modify them according to our personal desires, and not be judged by others for doing so.
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Old Sep 20, 2012, 08:13 AM
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Last edited by Brian VT; Sep 20, 2012 at 08:27 AM.
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Old Sep 20, 2012, 08:47 AM
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Joined Jan 2010
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Quote:
Originally Posted by Jovanx View Post
The next step is to set all surfaces to neutral and take it out on a calm day. Don't worry about what it does when under power, but just adjust the elevator trim so that it glides hands-free without porpoising.
Adjusting elevator trim is ok as an interim fix but ultimately you should be flying with a neutral elevator, so shift the CG as needed to achieve the best glide. Some argue that "a little" elevator trim does not cause significant drag or other problem but i is a sloppy solution.
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Old Sep 20, 2012, 08:52 AM
Registered User
United States, TN, Johnson City
Joined Jul 2011
185 Posts
Quote:
Originally Posted by Jovanx View Post
I am amazed that you could get it to balance at that location with an 1800 battery and no weight on the tail. I tried an 1800 once and the plane definitely moved faster and came down faster.

.
Me too! I With an 1800 I am guessing I would be around 82mm, but that is with stiffening mods and 1 oz. of lead on the tail!
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Old Sep 20, 2012, 09:10 AM
Tossing planes into the snow
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Quote:
Originally Posted by kaptondave View Post
Adjusting elevator trim is ok as an interim fix but ultimately you should be flying with a neutral elevator, so shift the CG as needed to achieve the best glide. Some argue that "a little" elevator trim does not cause significant drag or other problem but i is a sloppy solution.
What you say is true for sure. My instructions were just the first step in the process, to see if it would glide without porpoising. The next step is to move the CG so the trim is no longer necessary.
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Old Sep 20, 2012, 09:22 AM
Proud member of LISF and ESL
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Joined Mar 2003
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Attention all new Radian Pro buyers and those considering buying a Radian Pro.

ALL MODIFICATIONS ARE OPTIONAL

Many have said this in bits and pieces so let me consolidate. The RP, as a thermal duration glider, flies very well straight out of the box. No mods are required. A little adjustment of the CG toward the rear is highly recommended, but other than that, all mods are optional.

This is like a Ford Taurus. Comes off the showroom floor and drives you everywhere reliably every day. Now, if you want a little better handling you might switch to the super stickey X1000 tires. And if you want a little more pop coming from those red lights, just add the Whamo engine booster. And to anchor it better, put in the super slamo brake shoes. Now if you want a little better steering, swap out the steering rack for the Zapo steering rack and the difference will blow you away. And, if you pull that motor and drop in a Super screamer V8, well, now you have a car you can proudly drive to the super market.

Or you can drive it off the lot and enjoy it for 100,00 miles with regular maintenance.

The Radian Pro is the same. You do not NEED to modify anything except, perhaps, move the CG back a bit as part of your tuning process. But if you fly the stock Radian Pro, as a thermal duration glider, with the recommended 1300 mah battery or one of comparable size and shape, you are good to go.

If you just like to modify things, there are lots of suggestions in this thread. But they are not required.


ALL MODIFICATIONS ARE OPTIONAL! THE RADIAN PRO FLIES FINE RIGHT OUT OF THE BOX.

This has been brought to you as a public service announcement by the association to stop the confusion.
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Last edited by aeajr; Sep 20, 2012 at 09:42 AM. Reason: Added this phrase - as a thermal duration glider
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Old Sep 20, 2012, 09:28 AM
Never enough time to fly!
ecase's Avatar
SLC, UT
Joined Sep 2006
1,437 Posts
Quote:
Originally Posted by aeajr View Post
Attention all new Radian Pro buyers and those considering buying a Radian Pro.

ALL MODIFICATIONS ARE OPTIONAL

Many have said this in bits and pieces so let me consolidate. The RP flies very well straight out of the box. No mods are required. A little adjustment of the CG toward the rear is highly recommended, but other than that, all mods are optional.

This is like a Ford Taurus. Comes off the showroom floor and drives you everywhere reliably every day. Now, if you want a little better handling you might switch to the super stickey X1000 tires. And if you want a little more pop coming from those red lights, just add the Whamo engine booster. And to anchor it better, put in the super slamo brake shoes. Now if you want a little better steering, swap out the steering rack for the Zapo steering rack and the difference will blow you away. And, if you pull that motor and drop in a Super screamer V8, well, now you have a car you can proudly drive to the super market.

Or you can drive it off the lot and enjoy it for 100,00 miles with regular maintenance.

ALL MODIFICATIONS ARE OPTIONAL! THE RADIAN PRO FLIES FINE RIGHT OUT OF THE BOX.

This has been brought to you as a public service announcement by the association to stop the confusion.
I couldn't have said it better myself. And with that I will go back to work.
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Old Sep 20, 2012, 09:34 AM
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Woodstock 1's Avatar
Ireland, County Kerry, Kerry
Joined Dec 2005
6,919 Posts
Quote:
Originally Posted by aeajr View Post
Attention all new Radian Pro buyers and those considering buying a Radian Pro.

ALL MODIFICATIONS ARE OPTIONAL

Many have said this in bits and pieces so let me consolidate. The RP flies very well straight out of the box. No mods are required. A little adjustment of the CG toward the rear is highly recommended, but other than that, all mods are optional.

This is like a Ford Taurus. Comes off the showroom floor and drives you everywhere reliably every day. Now, if you want a little better handling you might switch to the super stickey X1000 tires. And if you want a little more pop coming from those red lights, just add the Whamo engine booster. And to anchor it better, put in the super slamo brake shoes. Now if you want a little better steering, swap out the steering rack for the Zapo steering rack and the difference will blow you away. And, if you pull that motor and drop in a Super screamer V8, well, now you have a car you can proudly drive to the super market.

Or you can drive it off the lot and enjoy it for 100,00 miles with regular maintenance.

ALL MODIFICATIONS ARE OPTIONAL! THE RADIAN PRO FLIES FINE RIGHT OUT OF THE BOX.

This has been brought to you as a public service announcement by the association to stop the confusion.
Absolutely. This should be printed and framed.

Chris
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Old Sep 20, 2012, 09:38 AM
Registered User
United States, TN, Johnson City
Joined Jul 2011
185 Posts
Quote:
Originally Posted by aeajr View Post
Attention all new Radian Pro buyers and those considering buying a Radian Pro.

ALL MODIFICATIONS ARE OPTIONAL

Many have said this in bits and pieces so let me consolidate. The RP flies very well straight out of the box. No mods are required. A little adjustment of the CG toward the rear is highly recommended, but other than that, all mods are optional.

This is like a Ford Taurus. Comes off the showroom floor and drives you everywhere reliably every day. Now, if you want a little better handling you might switch to the super stickey X1000 tires. And if you want a little more pop coming from those red lights, just add the Whamo engine booster. And to anchor it better, put in the super slamo brake shoes. Now if you want a little better steering, swap out the steering rack for the Zapo steering rack and the difference will blow you away. And, if you pull that motor and drop in a Super screamer V8, well, now you have a car you can proudly drive to the super market.

Or you can drive it off the lot and enjoy it for 100,00 miles with regular maintenance.

The Radian Pro is the same. You do not NEED to modify anything except, perhaps, move the CG back a bit as part of your tuning process. But if you fly the stock radian pro with the recommended 1300 mah battery or one of comparable size and shape, you are good to go.

If you just like to modify things, there are lots of suggestions in this thread. But they are not required.


ALL MODIFICATIONS ARE OPTIONAL! THE RADIAN PRO FLIES FINE RIGHT OUT OF THE BOX.

This has been brought to you as a public service announcement by the association to stop the confusion.
Wish I had thought to do that!
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