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About LiPolys

June 30th, 2004 12:00pm. RC

With nothing better to do on the plane, I charged, discharged and charged the LiPoly battery to see how much capacity it really had. I got some strange results:The battery is a Thunderpower 2100, with a manufacturing stamp on the label of 6-4-04

  • 6-28-04: I set the Triton charger to charge at 2.1 AH, 11.1 volts. It ran for 69 minutes. Final charge was 12.56 volts, 1.796 AH put into the battery
  • 6-29-04: I set the Triton to discharge at 2.1 AH down to 9 volts. After 56 min, the Triton stopped at 10.5 volts, having discharged 1.635 AH.
  • 6-29-04: I set the Triton to charge at 1 AH. It started charging at 10.69 volts and finished at 12.56 volts, having put 1.654 AH into the battery after 110 minutes.

So, what’s up with the Triton only drawing down to 10.5 volts? And why did it only pull about 1.7 AH instead of 2.1 AH? I called Sal at NESail and he had a lot to say.

First, he warned me very sternly (!) that I shouldn’t ever ever ever discharge a LiPoly on a charger. There’s no need to and it could damage the battery by drawing the battery down too much. Discharging in a charger is bad because, if a LiPoly is brought down too flat, it’s capacity will be permanently significantly diminished; a charger discharges the battery too slowly to hit the obvious 3 volt/cell wall. If you are flying, the high drain on the pack lets the drain work correctly. In addition, a good speed control will tell you when it’s time to come in for a charge. You shouldn’t drain the battery more than 75% or they’ll go bad on you. That’s 1.575 AH on a 2.1 AH battery.

It sounds like the Triton company is aware of this 75% rule. That’s why they the charger only draws down to 10.5v on a 3 cell 11.1 v pack. The Triton charger seems to have a user interface problem. On the discharge cycle, the options it gives are “3v”, “6v”, and “9v”. The obvious implication is that it will draw the cell down to the specified amount but it doesn’t. It draws the pack down to what is considered “safe” flat… on the “9v” setting, it draws to 10.5v. Instead, it should give options like the following: “1 cell”, “2 cell”, “3 cell”. Or “3.7v”, “7.4v”, “11.1v”. Or “3.5v”, “7v”, “10.5v” because that’s what it draws down to.

Burning Man Art

June 30th, 2004 12:00pm. RC

I’ve been talking about lighting the Projeti for Burning Man in my regular journal. I found a bunch of sources for wire. Well, I found the source I’m going to use: http://www.coolneon.com. This from the Coolneon gallery:

Bad Speed Controller

June 29th, 2004 12:00pm. RC

Sean at Castle Creations talked me through 2 diagnostics:
- Set the Soft Start option to “fast start”.
- Resolder the connections to the motor

Neither helped so he’s sending me another speed controller. It’ll be here in a couple days. I’ll be in Vermont for the 4th so no flying ’til after I get back. :-(   And I don’t want to bring the Zagi. The Zagi is tired. It needs to rest.

Spam Stopper Idea

June 29th, 2004 12:00pm. General

Run potential spams through a grammar checker…. like MS Word’s grammar checker. That will surely differentiate the gibberish spammers insert into their emails from legitimate emails that use real sentences. It might be computationally expensive but not THAT expensive…

Rail Guns are Cool

June 28th, 2004 12:00pm. General

Cool snippet of the day:

Rail guns require a pulse power system to convert prime electrical power to the instantaneous current pulse necessary for electromechanical launch. The most advanced pulsed power systems use rotating alternating current machines, called pulsed alternators, to supply electromagnetic current pulses to the rails

“I’d like a phased plasma rifle in the forty watt range”

Escape velocity from earth is about 11 km/sec. This doc says 2.5 km/sec is being done right now experimentally and could be in the field, firing on targets 250 miles away. 6 km/sec is doable, not enough to break orbit but still pretty darn cool. To power one of these rail guns and fire it at 6 rounds/minute, you need something like 40-80 megawatts. Just the dissipated kinetic energy of the impact of one of these mach 7 projectiles is enough to….. it’s enough; no explosives needed.

Good and Bad Things with the Projeti

June 28th, 2004 12:00pm. RC

It’s together. :-) Last night, I reved it up to full power, pointing the nose up toward the ceiling. I could feel it pushing up against my hand. If I had let go, it would have shot straight through the ceiling. Well, not really… it would have hit the ceiling and then shattered into maybe five or ten pieces… but you get the idea; vertical performance :-)And now the bad news: I was getting ready for my outing today and the prop wouldn’t turn. When I gave it throttle, the prop would do this unhappy buzzing thing. The prop doesn’t turn, it just vibrates! Waah! But today was the day! Wahhh!

I called NESail at 5pm and Carolyn said I’ll get a call back by the end of their work day… which is at 6pm…  in 5 minutes. :-( I don’t think I’m going to get that call. :-(

Maybe I changed an important setting on the ESC when I tried to program it. It’s a Phoenix 25 brushless ESC. It took me a while to figure out an important aspect of programming: go slow. If you try to program it too fast, it drops out of programming mode unexpectedly. I’ll go try to program it AGAIN…

——————-

NESail called me back at about 6:05 6 :-) The guy at NESail, Sal talked me though some diagnostics but couldn’t help. He thought it was most likely a busted ESC, though such problems are rare. He motioned me toward Castle Creations. He says that if it’s busted, I could exchange it though either NESail or Castle Creations. Of course I’m unhappy that I’m having trouble with it but NESail has been pretty sand-up-ish. I left a message at Castle Creations after hours. Hopefully they’ll call me back shortly!

Coming Together

June 27th, 2004 12:00pm. RC

I’m about 3/4 finished putting it together. I’ve had two problems…. first, nesail.com sent me 14″ servo extensions when I only needed 4″ extensions. The extra 10″ is a pain to stow away on such a small plane so I went to Kenvil Hobbies and bought 6″ extensions. They fit great. Second thing: I couldn’t figure out how to use the (very pretty) colleted prop adapter. In the process of trying to figure it out, I broke it. So I bought a new Master Airscrew prop adapter at Kenvil Hobbies. It works great except I needed an extra washer as a spacer; 15 minutes of swearing to myself in the nuts and bolts aisle and I found what I was looking for, a single 6mm washer.Most of the decals are on. I wasn’t going to put the decals on because I want to do it de’art for Burning Man, but I realized that they are an important structural element of the plane. They offer protection for the underbelly and most especially, the decal is 3/4 of the hinge for the elevons. Before I cut out the decals, I traced them on a sheet of clear plastic, so I might make another set of decals out of a material and appearance more of my choosing.

I ran the motor. Wooeee, it’s windy! I had trouble holding it in my hand, it pushed so hard! I think it might offer more thrust than the weight of the plane! Woo hoo, hangin’ on the prop is a possibility…. well, except that it’s a pusher plane, but I’m sure you still share my enthusiasm.

While putting the Deans Ultra connectors on the LiPoly battery, I accidentally shorted it for about 2 seconds! Yipe! It didn’t just spark, it fully arced, slightly pitting my Radio Shack holder thingie. Now, all I can think about is how HForo69 (an AIM flying buddy) told me how damaged LiPolys can burn out cars and burn down homes! Before I went to bed, I put the battery on the cement floor of the garage and put a big ceramic jar on top of it. (Thanks for the jar, Melis ;-)

I did some math on http://brantuas.com/ezcalc/dma1.asp and ass-u-ming that my batteries can do 10C… this isn’t for sure, the previous generation could do 6C and the new ones are supposed to do 10C… but I don’t even know for sure that I have a “new” one. It says “6/4/04″ on it which I suppose is the manufacture date, but that could be the assembly date or….
So, assuming the battery can do 10C, this plane will totally rock:

  • 3S TP2100 battery
  • Mega AC 16/15/4 motor
  • 6×4 APC prop
  • 20.2 amp draw
  • 19,400 RPM prop
  • 196 watts in
  • 167 watts out
  • 85% efficiency
  • prop static thrust: 32 oz
  • prop pitchspeed 74 mph
  • full throttle duration: 6:14 minutes

The plane has a flying weight of about 20 oz :-)

Symantec’s Stupid Legal Department

June 26th, 2004 12:00pm. General

The email I sent Chansonette Connolly on the 22nd bounced. I’m going to send a paper letter shortly…. and start pirating Symantec software as prolifically as I can.

Match.com Relented

June 22nd, 2004 12:00pm. General

They let me use my username of choice :-)

Symantec’s Legal Department

June 22nd, 2004 12:00pm. Geekery, Notable

At the request of a client, I contacted Symantec about some suspected pirated software I bought on Amazon zShops. I sent the Symantec legal department a juicy info packet on my purchase.

From: Chansonette Connolly [mailto:ccon.don't spam her.nolly@symantec.com]
Sent: Monday, June 14, 2004 4:03 PM
To: [Lee]
Subject: Re: Report of Suspected Piracy of Norton AntiVirus 2003 from a Third Party on Amazon.com 4/21/04 - [removed] (zShop)

Dear Mr. Sonko,

Thank you for submitting to us the CD you purchased from [removed] (zShop) marked Symantec Norton AntiVirus 2003 for evaluation, together with your documentation. We have examined the CD you submitted and believe it to be counterfeit. Therefore, and as I am sure you can understand, we will not be returning the CD to you. Our records show that this entity is not an affiliate or authorized partner of Symantec.

You may wish to contact your credit card / financial organization and find out what options you may have in a situation like this. We appreciate your taking the time to send us documentation relating to your purchase, which will assist us in continuing to investigate this matter further.

We appreciate the faith you have shown in Symantecs products by purchasing legitimate software to replace any counterfeit software you might have had. Please be assured, you have made the right decision given the risks associated with counterfeit software, be it faulty operation, leaving your computer open to cyber attack or possible damage to your computer. Furthermore, legitimate software gives you the right to obtain updates generated by Symantec for that software. Updates are necessary to help protect your system from cyber attacks, which evolve on a daily basis.

We look forward to serving you as one of our valued customers and hope to make your cyber experience as safe and enjoyable as possible.

Sincerely,

——————————————————————————–
Chansonette Connolly
Manager, Worldwide Brand Protection
Legal Department
Symantec Corporation
Office: (408) 517-8045
Interoffice: 6 [408] 8045
Fax: (408) 517-8121

Email:
chanso.don’t spam poor Chansonette.nette_connolly@symantec.com

www.symantec.com

Any my response

When I wrote to Drakes (the company that makes Devil Dogs, Ring Dings and Yodels supermarket pastries) telling them about some bad Yodels I bought last year, they at least gave me a coupon for some free Yodels. When I wrote to them, all I included was a photo of some sorry-looking Yodels and a short explanation. When I wrote to you, I included a lengthy description that puts me on the spot vs. Amazon and vs. an Amazon seller, packaging material, and the actual product. You now have all the incriminating evidence you need to stop a major American pirate of your software.

For my trouble, all I got was a pat on the back. You can be sure that I wont ever be bringing potentially pirated software to your attention again. You could learn a lot from a Yodel.

In Other News

June 22nd, 2004 12:00pm. General

I‘ve been Match-ing for a couple days… It’s quite stressful.

We bottled our wine a couple days ago.

I’ve been ComputerGuying at a pace. I’m very worried that there isn’t enough money to be made in the residential market though. I’m joining the Hackettstown Rotary Club. That might help. I sure hope.

Construction on the Projeti plane continues. It’s all over the dining room table!

I’m lonely.

I’m going to try golfing and hiking a bit. Allamuchy State Park looks like it could make for some nice walks.

My Burning Man ticket arrived in the mail! I’m so nervous!

The NYC Burning Man group looks very very active. The NJ group…. well, I had to write to the administrator to be sure I was on the list after a week because I couldn’t tell if I was on it or not. I’m caught (again) with the option of making friends that live over an hour and a half away from me.

Meetup.com is….. there’s nothing going on in Northern NJ. Nothing that would even remotely interest me. I signed up for like 10 groups and couldn’t find a single group with more than 4 legit members.

Marlboro / Marlborough Massachusetts

June 18th, 2004 12:00pm. General

As I was driving around Marlboro 2 weeks ago, I ran across the weirdest thing… Some of the OFFICIAL signs in this town read “Marlboro” and some read “Marlborough”. I thought that spelling differences like this had been done away with in the seventeen hundreds!

Match.com Stupidity

June 18th, 2004 12:00pm. General


Match.com doesn’t want me to use my real name as my username, so they shut down my account. The real crime here is that I’m not a wa-, a wa-, a wacky weatherman named Harris K. Telemacher.

The Name of my Band

June 18th, 2004 12:00pm. General

Last weekend, Noni, Bamfa, Julia and I went to the Cole Brothers Circus in Hackettstown (just across the way from where the Merry Go Round picture was taken). It was a pretty darn good show! On our way out, Julia got a mermaid balloon. When we were in the car on the way to dinner, I noticed that the mermaid wasn’t the ubiquitous Ariel. I asked Julia what the mermaid’s name was. She eyed the blow-up fish and promptly declared, “Her name is Lola Paralyze!” I think that rolls off the tongue pretty well, don’t you?

Hear it

Projeti

June 15th, 2004 12:00pm. General

The plane and parts arrived today. See my flying journal

eBay to the Rescue: Pocket PC

June 15th, 2004 12:00pm. General

The Pocket PC I ordered on eBay came in. I opened up the box, reset the device, set it in the cradle, followed the on-screen prompts to register it with my computer, and it instantly replaced my ailing Pocket PC. I love it when a plan comes together.

[grin] something “just worked”!

eHarmony

June 15th, 2004 12:00pm. General

I was talking to TJIC and two other friends of his tried eHarmony and both were hopeless like me. Of course, TJIC is easily categorized so he can use the service. ;-)

Squat

June 15th, 2004 12:00pm. General

Submitted for your approval

from http://naturesplatform.com/

Today’s Quote

June 15th, 2004 12:00pm. General

“You never drink the blood.”

Projeti Arrival

June 15th, 2004 12:00pm. RC

Arrival

The Projeti arrived today with all it’s parts. That was fast :-)

Notables:

  • The $80 Mega brushless motor is virtually indistinguishable visually from the $10 brushed motor. Weird… cool…
  • The 2100 Mah 11.1 V lipoly battery is considerably smaller and lighter than my 1700 Mah 9.6 V Zagi pack. I’m still worried that I’ll be drawing too much juice from it, burning out this $80 battery prematurely. I’m especially worried about the temperature constraints of the pack. The Nevada desert will be 100 degrees during the day and the max recommended charging temperature of the battery is…. 100 degrees. The max recommended discharge temp is 160… only 60 degrees above ambient temp, and with the sun beating down on it. We’ll see what happens. Maybe I won’t fly it during the day.
  • The Projeti looks to be made from EPS foam. I was told that it was “a bit stronger than EPS”. It would have been nice if it were EPP or a foam-composite or something. But no, it’s just EPS. Of course I realized this issue before purchasing, but I’m still worried about its resiliency compared to the Zagi.
  • I wonder what 70 mph alkali dust storms do to r/c equipment?
  • I’m thinking of getting flexible lighting wire and creating the silhouette of a hawk on the bottom of the plane, then covering the bottom with doculam clear plastic sheeting. That could be cool.
  • The Triton charger is 1/2 the size of the Astroflight 110D charger. Tech. Cool.
  • If I can get the twin tails to fold down (or something), the whole suitcase I’ll need to haul the plane and equipment will only be about 34″ x 24″ x 5″. Cool.

Zagi News

My second motor is on its way out. I lost another $1 prop to overheating. I’m a bit surprised at that because this second motor is a 7.2V motor… IE, it spins slower at WOT. I had figured that the first motor, a 6V motor was burning itself out extra quick because I was pushing it waaay too hard. And I was only pushing the 7.2V way to hard.

The 2 NiMH 1100 battery packs are having some trouble. I pretty much figured when I got them that I was drawing too much power from them. But I got a whole year of flying out of them, so I’m not unhappy. I tried strapping both to the plane and flying them in parallel. It worked reasonably well. The plane was heavy like a dog but it flew fine enough. I was a bit surprised when I landed the dual-pack arrangement and both batteries were very hot. Shouldn’t I have been drawing 1/2 the normal amperage? Well, as I said, the packs are on their way out… But if they’re on their way out (loosing full power after only about 5 minutes), shouldn’t just 1 or 2 cells per pack be getting really hot? Eh. Whatever.

I ripped off a winglet Monday afternoon when I landed a little hard in some tall grass. So I tried flying winglet-free. YOW, bad idea! When I went into any kind of high-banked turn, the nose would turn toward the earth and I’d lose altitude like it was going out of style. I tried doing a roll without winglets and, YIPE! I had reasonably good form but midway through the roll, the plane started fluttering down to the ground like a piece of paper, flipping nose-over-tail and such. Just zooping about, it was hard to keep it flying straight. Any sudden shift on the controls or in the wind and the plane wouldn’t know which way was forward. Bleh! Conclusion: The Zagi 400X cannot fly without winglets. I’m glad I did the experiment.