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CAELESTIA NEW F3A 2011

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Old 06-26-2012, 04:40 PM
  #151
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Default RE: CAELESTIA NEW F3A 2011

Bob, here is what I have in the Ice2 HV80 at maiden with the Advance :

Throttle Response Medium*
Current Limiting Normal*
Motor Start Power Low
Motor Timing Normal*
PWM 8kHz
Software 3.27

This must be one very efficient motor, pulling very low current compared to other motors.  What can one really tell from one flight, but my sense is that I will be regarding the data logs very differently compared to the outrunner data that I am used seeing in my large electrics. If I get to Augie's when Joe L. is there this weekend, we will see how my set-up is performing in comparison to his Advance powered Xigris, for example.  My initial impression is that this motor has so much power in reserve that it may be relatively insensitive to a few odd esc settings (but then again I may be a fool LOL). What are your impressions so far?
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Old 06-26-2012, 05:01 PM
  #152
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Default RE: CAELESTIA NEW F3A 2011

Dana, after tomorrow (hopefully) and Sunday I will know more.

I'm a bit 'slow' at times, but it is gradually dawning upon me that without data we are simply throwing crap against the wall to see what sticks. Hence the irresistible compulsion to install the HV80.

It has gobs of power and looks quite robust in build. Seems that at least part of the explanation for its efficiency comes from the tight tolerance in construction. The space between the stators and the windings can't be more than about half the diameter of a human hair. I hope those bearings hold up!
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Old 06-26-2012, 05:11 PM
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Old 06-26-2012, 05:12 PM
  #154
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Default RE: CAELESTIA NEW F3A 2011

If by data, you mean numbers, sure. But I cracked the throttle (no curve) and the Nuance was lifting into the air before I got half way. Wow I kept pushing the stick up, just in case, but the deed was done and the beast was airborne while I was still thinking about moving that stick up. Anecdote, yes, but that's some holy crap we are "Advancing" against the wall LOL. OT here, but the Nuance thread has some similar stories about this motor LOL. Forgive me, its my first Pletty and I am a bit giddy!
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Old 06-26-2012, 05:58 PM
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Default RE: CAELESTIA NEW F3A 2011


Quote:
ORIGINAL: cmoulder


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ORIGINAL: danamania

Bob, the gear plate defects aside (sucks at this price point), how do you like it after Pocono? Almost pulled the trigger on this one, sure is a pretty bird in many respects and I enjoyed watching you fly it. Working for you?
Yes, back on topic, I like the plane but it is a long way from being set up. CG needs to be a bit farther back for my tastes and the throttle curve is totally wack. The rates are OK but expo needs a lot of work. In short, there is a lot left to sort out and it was way too early to bring it to Pocono, but it was impossible to resist the urge to play with the new model.



This Sunday I will take a more sober and methodical approach to ironing out the setup. The LG issue got me a bit off track.
Bob
Where is your cg now?
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Old 06-26-2012, 06:08 PM
  #156
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Center of the wing tube, which is 6-3/8" (162mm) from the LE at the root.
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Old 06-26-2012, 06:45 PM
  #157
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Default RE: CAELESTIA NEW F3A 2011

Should be fine there, adjust stab to take any trim out and that should get it very close, that is where mine is, and I carry no pitch mix in knife and just a little roll at high rates for the F stuff.
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Old 06-26-2012, 06:50 PM
  #158
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Default RE: CAELESTIA NEW F3A 2011

I will try that. I have a tiny bit of up elevator trim which results in a bit more push than I am used to when inverted.
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Old 06-27-2012, 06:15 AM
  #159
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Default RE: CAELESTIA NEW F3A 2011

Very, very nice aircraft. What's the over-under on how long it will be before Hobby King is selling these? Saw it happen with the BD-5 and the GP Rifle.
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Old 06-27-2012, 10:02 AM
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ORIGINAL: cmoulder

I will try that. I have a tiny bit of up elevator trim which results in a bit more push than I am used to when inverted.
Hi Bob,

Generally I trim to get the KE as close to 0 coupling as possible, and adjust rates/expo to get the inverted feel I want.
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Old 06-28-2012, 06:15 AM
  #161
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Quote:
ORIGINAL: danamania

If by data, you mean numbers, sure. But I cracked the throttle (no curve) and the Nuance was lifting into the air before I got half way. Wow I kept pushing the stick up, just in case, but the deed was done and the beast was airborne while I was still thinking about moving that stick up. Anecdote, yes, but that's some holy crap we are ''Advancing'' against the wall LOL. OT here, but the Nuance thread has some similar stories about this motor LOL. Forgive me, its my first Pletty and I am a bit giddy!
I got to work on the throttle curve yesterday and it is MUCH better, utilizing the entire range now and smooth throughout with a little flat spot mid-stick RPM of 3700. That might be adjusted up or down once I actually fly it like this. Downloaded data logs were very encouraging with very modest. Amp draw at 6200 rpm. Even with a PT 20x15 current was only 71 amps.
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Old 06-28-2012, 06:29 AM
  #162
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Default RE: CAELESTIA NEW F3A 2011

Nice! If it is not too hot after work, I will take the Nuance/Advance out for a few more trim flights. Will actually be interesting to see the performance given the heat and that will give me ideas for a curve, or not. The basic airframe trim situation is very close, so I hope to form more of an impression about this new motor sooner rather than later. Actually, the coming heat wave is just the ticket to get the Advance set-up tuned before the next contests: I gotta find the silver lining somehow, LOL!
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Old 07-03-2012, 03:20 AM
  #163
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I put up about 10 flights Sunday with 90-95 deg temps and no issues with component overheating. Motor was a few degrees above ambient and the ESC log read a max of 141deg although upon landing it wasn't the slightest bit warm. I am, however, glad that I made the additional vents in the fuse belly because without them the vent intake/exhaust ratio would not have been much more than 1:1 instead of the preferred 1:2 or 1:3.

While installing the HV80 I took the opportunity to solder the motor and ESC wires and get rid of the connectors and a good bit of wire, and also move the ESC a few inches forward so that it is located under the motor, which helps with the CG when using lighter batteries. The LG fix is holding up well although at some point I hope to repair the fuse damage from the LG collapse. Kinda 'Band-Aid'ed' over for now and that's okay because it is purely cosmetic and not structural.

I added a touch of down elevator at idle (3%) but the KE on both sides was so close with no mix that it didn't make sense to try to tweak it in the blustery/bumpy wind. Plenty close for me as I am only flying AMA advanced... no P or F on my horizon for a long while yet, if ever!
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Old 07-03-2012, 01:25 PM
  #164
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Default RE: CAELESTIA NEW F3A 2011

Hi Bob,

Were you having trouble with cooling? Or just added the outlet for your own comfort?

I have no additional outlets except the fuse sides, and was just flying down in Toronto in some very hot weather (~90-95F) without any troubles. Motor and batteries were fine, ESC was pretty warm but operated fine all weekend, so just curious if your setup requires more cooling.
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Old 07-04-2012, 03:34 AM
  #165
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Quote:
ORIGINAL: can773

Hi Bob,

Were you having trouble with cooling? Or just added the outlet for your own comfort?

I have no additional outlets except the fuse sides, and was just flying down in Toronto in some very hot weather (~90-95F) without any troubles. Motor and batteries were fine, ESC was pretty warm but operated fine all weekend, so just curious if your setup requires more cooling.
Chad, I anticipated a possible cooling issue based upon intake:exhaust ratio.

Don't know if this would have been an issue, but there's an easy way to check - I'll tape over the additional exhaust vents and check the data log for ESC temps and check the motor and batteries as well.

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Old 07-04-2012, 05:14 AM
  #166
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Hi Bob,

That would be an interesting experiment if you dont mind doing it I would very much like to know the results.
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Old 07-04-2012, 11:49 AM
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Default RE: CAELESTIA NEW F3A 2011

Will do! I won'tbe able to fly again until the AGS contest next weekend but will make it a point to do so.

Should be good and hot, therefore a valid test.
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Old 07-04-2012, 12:43 PM
  #168
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Default RE: CAELESTIA NEW F3A 2011


Quote:
ORIGINAL: cmoulder

Will do! I won'tbe able to fly again until the AGS contest next weekend but will make it a point to do so.

Should be good and hot, therefore a valid test.
There is nothing good about this. This is insane. I am not going outside. I don't even think I will go to work tomorrow, unless my AC breaks down, in which case I will be working overtime through next week.

The Caelestia is such a sweet looking airplane. I am looking forward to seeing some on Muncie. Hopefully I will not melt before then, and I will find some time to venture outside to practice.
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Old 07-04-2012, 08:56 PM
  #169
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Default RE: CAELESTIA NEW F3A 2011

I'll take 100 degrees over snow any day.....

Verne


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ORIGINAL: gaRCfield


Quote:
ORIGINAL: cmoulder

Will do! I won'tbe able to fly again until the AGS contest next weekend but will make it a point to do so.

Should be good and hot, therefore a valid test.
There is nothing good about this. This is insane. I am not going outside. I don't even think I will go to work tomorrow, unless my AC breaks down, in which case I will be working overtime through next week.

The Caelestia is such a sweet looking airplane. I am looking forward to seeing some on Muncie. Hopefully I will not melt before then, and I will find some time to venture outside to practice.
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Old 07-05-2012, 01:15 AM
  #170
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Quote:
There is nothing good about this. This is insane. I am not going outside. I don't even think I will go to work tomorrow, unless my AC breaks down, in which case I will be working overtime through next week.
A lot of people feel this way, LOL!

Fortunately my personal temperature range is quite wide, so as long as it isn't raining and/or very windy I am happy... or happy enough. Nice thing about that is it opens up a lot more flyable dates!

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Old 07-11-2012, 12:52 PM
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Default RE: CAELESTIA NEW F3A 2011


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ORIGINAL: can773

Hi Bob,

That would be an interesting experiment if you dont mind doing it I would very much like to know the results.
Graph below from today. Seemed to make NO difference, so the additional outlets are not necessary, at least not for ESC cooling. I hoped to check the motor and batteries with an IR thermometer but the battery was dead. However, still to the touch they felt very much within normal range.

Ambient temp about 87degF. Max tem measured was 118degF and that was on one of the flights with the outlet open!
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Old 07-11-2012, 01:42 PM
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Default RE: CAELESTIA NEW F3A 2011

On a completely different tangent about a couple of important lessons learned, let me just say first I am somewhat lucky to still have the Caelestia in one piece!

Shortly after take-off in the third round at AGS the motor just stopped. I was very fortunate that I had enough altitude to circle back for an uneventful landing. It took a few minutes to identify the culprit, but it turned out to be a defective arming plug for the MPI AntiSpark arming plug.

I like the way the unit works, but the arming plug itself was the problem. It was one of a few spares I bought at the time I purchased the unit, because I could just imagine losing that small part and how that loss could really ruin a weekend. I have the APP contacts and housings and the crimper and could have made my own, but they were cheap enough that I simply ordered them.

It turned out that this particular plug had not been crimped adequately and there was no solder or anything else keeping the wire in place except a little friction, and with the lack of sufficient contact area the last few strands of wire were burned out with the arcing. As anybody who has used an APP crimper knows, this is not the way a proper crimp looks.

I am using the Dimension Engineering VHVBEC as primary power, but thankfully the LiPo battery back-up and Tech-Aero reg took up the slack. Without them, the Caelestia would have been history!
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Old 07-12-2012, 06:52 AM
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Default RE: CAELESTIA NEW F3A 2011

Quote:
ORIGINAL: cmoulder


Quote:
ORIGINAL: can773

Hi Bob,

That would be an interesting experiment if you dont mind doing it I would very much like to know the results.
Graph below from today. Seemed to make NO difference, so the additional outlets are not necessary, at least not for ESC cooling. I hoped to check the motor and batteries with an IR thermometer but the battery was dead. However, still to the touch they felt very much within normal range.

Ambient temp about 87degF. Max tem measured was 118degF and that was on one of the flights with the outlet open!
Bob,

I am finding out in my gas experiments that simply opening exhaust outlets doesn't mean much. One thing I am incorporating in Delta is ducted outlets....fluid dynamics will create a low pressure area around each outlet and literaly draw out the hot air. Inlet to outlet ratio of 1:1 works well in this type of set-up. Ill be posting photos in the Derivative thread
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Old 07-13-2012, 03:59 AM
  #174
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Default RE: CAELESTIA NEW F3A 2011

Matt, I would like to see how your ducting is designed for the Derivative (Delta?) and how the low pressure outlet works. I suspect that the recessed exhaust vents Chad designed into the Caelestia fuse work in this manner.

The ability to log accurate data while flying is fabulous, IMO. Now, we don't have to wait for a smoke trail or to draw inferences from temperature checks after landing or by checking battery state.

A lot of myths are being busted. This is one significant misconception that has been cleared up for me.
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Old 08-21-2012, 03:53 AM
  #175
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Default RE: CAELESTIA NEW F3A 2011

Photo of Ken Velez' Caelestia at the Paradise contest last weekend.

Ken has got the model dialed in pretty well to his liking and says he plans to get another as a back-up.
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