Tragi 801 - Page 17 - RC Groups
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Mar 16, 2010, 02:49 PM
Registered User
ClayH's Avatar
Tuan writes
my reaction is in the 280ish today
That's why you fly Futaba - with your reaction time you'd need to push down when you get to the berm at Visalia to hit the landing target if you were flying JR !

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Mar 16, 2010, 02:53 PM
F3B and F3K
RetoF3X's Avatar
This might be one reason why it takes a competition pilot so long to get comparable results with a new plane. One has to adapt to the response of the plane by practicing a lot of launches.
In principle it is a routine one learns, it is the same as in other sports where timing matters (e.g. how can a Ski jumper optimize his timing-by practicing a lot).

In control theory, the smith predictor takes latency into account and this is exactly what the pilot ideally should do, "thinking" ahead in the launch.

Mar 16, 2010, 04:39 PM
Registered User
Avaldes's Avatar
Be careful mixing system latency (tx to rx latency) and rate limits (servo slew rates). One is a property of a linear system and one is a nonlinearity. Believe it or not, they show up differently in the total system performance. And as pilots we can adapt to both of them remarkably well. When you design autopilots is when you need to really undertand these properties.

Mar 16, 2010, 05:10 PM
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R.M. Gellart's Avatar
Again, the professional speaks, thanks Aaron!
Mar 18, 2010, 08:24 AM
Registered User
A question to OVSS Boss . What kind of receiver are you using with the high voltage 7,2V JR servos ?? .

With the elevator in the launch i came a cross ona thought of mass balancing , maybe it would work . Gl with the Cluster .
Mar 18, 2010, 03:34 PM
Registered User
R.M. Gellart's Avatar
Charged, I am using a 900 series 2.4, but any JR RX can handle the higher voltages. The range is 3.5 to 9.6 volts for about any RX they make, as a freshly charged 2S pack, is aboiut 8.2V give or take.

As far as the stab, I will fly it and see, I doubt that I have any issue with a 75oz-in troque servo.

Mar 18, 2010, 06:36 PM
Registered User

will it fly?

Is this plane ever going to fly?

Mar 18, 2010, 09:00 PM
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R.M. Gellart's Avatar
Yap, after Toledo...
Mar 21, 2010, 11:13 AM
Registered User
R.M. Gellart's Avatar
Pics this evening, should have it done from a practical stand point. Aileron servos in last evening, flaps this morning and get the pushrods built and control horns in.

Mar 21, 2010, 04:58 PM
Registered User
R.M. Gellart's Avatar

Major Milestone!

Well, the wing servos are in and roughed pushrods are on the ship. So, the moment of truth you could say had arrived, marked a CG and hung a cup on the nose and poured the loose #8 shot in till I had a level ship.

I made it, sub 65 ounce ship!!!!!

To be exact, it was 64.6 ounces. I know that before it is done, it will be 65 most likely, but I am pretty stoked about the results. No pics, you seen this stuff before.

Mar 21, 2010, 05:19 PM
Hot Dawg Glider Pilot
schrederman's Avatar
No pics, you seen this stuff before.

Now I feel cheated...
Mar 21, 2010, 05:34 PM
Registered User
R.M. Gellart's Avatar
You probably said that to some girl in high school I would bet...LOL
Mar 21, 2010, 05:43 PM
Registered User
pics, you can never have too many pics. Each one is different.
Mar 21, 2010, 06:52 PM
Team Futaba
Silent-AV8R's Avatar
Without photographic evidence of the plane on certified scales how can we believe such a claim. Also, how much performance loss do you anticipate if it indeed ends up being a flying pig at 65.1 ounces versus 64.6 ounces??

I do admit, if indeed the plane is as light as you claim (pending verification on certified scales) then that is an amazing achievement.
Mar 21, 2010, 08:56 PM
Registered User
R.M. Gellart's Avatar
Bill, I will check at the meat market and see if it will fit. And yes, it is an amazing achievment, at least for me, others maybe not...

SHV, I am pooped, foot hurts and the ice bag is calling, maybe a couple in the morning.

Last edited by R.M. Gellart; Mar 21, 2010 at 09:04 PM.

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