German SAW 2016 in Munich

[Darin Jordan]

The German SAW event is happening starting today in Munich! I don't know where there are any direct feeds of information, but HPR Powerboats, and others, are posting info on Facebook. I'll try to update this thread as I see more information.

I know that Tyler Garrard is in attendance, running a new Q-Hydro that Brian Buaas build for him and that Tyler powered up! (Brian's hull, Tyler's electronics!). He, and two others there, I believe including Joerg, are all going after the Overall record! Should be interesting!!

The event is held at the Olympic Rowing facility in Munich Germany.

Here is the video from last years event:


https://youtu.be/nM2GMuxV07Q

The Paddock this morning:

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[Darin Jordan]

Here is a webpage showing the race site with some webcams:

http://www.leistungszentrum-muenchen.de/die-anlage/webcam/

[Darin Jordan]

Ladies and Gentleman, the rc boat scene has a New absolute World record, set by Jörg Mrwitschka. The boat is an 8-cell rigger and clocked an average speed of 273km/h and a top speed of 288km/h.

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[Darin Jordan]

You have to have Facebook to view this, but here is the new World Record Speed run...

https://www.facebook.com/lehner.motoren/videos/1296635377055833/

[properchopper]

Ladies and Gentleman, the rc boat scene has a New absolute World record, set by Jörg Mrwitschka. The boat is an 8-cell rigger and clocked an average speed of 273km/h and a top speed of 288km/h.

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For the conversion challenged :

288.438 kph = 179.2271 mph

273.076 kph = 169.6816 mph

Any word from Tyler ?

[Doug Smock]

Congratulations Jörg!! :buttrock:

[Terry Keeley]

WOW!!! :thumbup1:

[line6]

Wow.... Man that thing sounds INSANE :buttrock:

[carphunter]

Hello,

New world record, from Jörg.

avg 285,393 Km/h (177,334 mph)
topspeed 298,656 Km/h (185.576 mph)

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[carphunter]

And here's a video of the top speed pass.


https://www.youtube.com/watch?v=dm4iBEsPfko&feature=youtu.be

[properchopper]

And here's a video of the top speed pass.


https://www.youtube.com/watch?v=dm4iBEsPfko&feature=youtu.be


Nice to see an Amigos shirt in the vid:wink:

[Fluid]

The evolution - 2000 to 2016. Quite a journey...

http://forums.offshoreelectrics.com/attachment.php?attachmentid=146564&stc=1
http://forums.offshoreelectrics.com/attachment.php?attachmentid=146565&stc=1

http://forums.offshoreelectrics.com/attachment.php?attachmentid=146566&stc=1

http://forums.offshoreelectrics.com/attachment.php?attachmentid=146567&stc=1

[raptor347]

The evolution of fast electric. I don't miss round cells or brushed motors.

Is the there a list of all the results somewhere?

[carphunter]

SAW Munich 2016:

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[Darin Jordan]

SAW Munich 2016:

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Very cool. Looks like there is a new 1-Cell Hydro bar to strive for!


1 Hydro L1 Michael Salffner 142,088 km/h 142,118 km/h (88.28929 mph / 88.30803 mph)

We'll see if I can answer that in November!

[properchopper]

The evolution of fast electric. I don't miss round cells or brushed motors.

Is the there a list of all the results somewhere?

Here 'Ya Go : (Uh wait.....)

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[carphunter]

Hello,

i have a new video with detail picture from Jörg on my channel.


https://www.youtube.com/watch?v=Fr7D9_V4UZs

[Fluid]

Jorg has been kind enough to provide some details on his record-setting hydro. He is one part fo the JAG's team - Arne and Gunnar Hold and Joerg:

Boat: .......... JAG's T Hydro 2015/2016, 125cm long, 55cm wide
Motor: ......... LMT 2260/5
ESC: ........... Highly-modified Schultze 18.xxx with lots of big FETs added
Battery: ...... 8s1p RoaringTop 5100 80C, charged to 4.23V/cell, prewarmed to 45°C
Propeller: .... JAG's C2044/3 (exact same design which set the 140mph record in 2006)
Hardware: ... 2.5mm piano wire with own design strut and rudder bracket, knife blade rudder

Acceleration power of the second pass (185 mph average) was 590A @29.0V and flat out power was 320A @29.5V after about 4s of full throttle. RPM came up to 63,900. :scared:

The boat has dual air brakes in the vertical stabilizers which cooperate with the proportional motor brake in the ESC. Total boat weight is approximately 7.5 lbs.

I want to thank my friend Joerg for providing us with this information. Of course what he did not tell us about was the very hard work over the past three years which lead up to this record. Combining that with mostly custom equipment, his record should stand for a long time (unless he wants to try to top it himself - but then why should he? He set the bar VERY high.)

[Darin Jordan]

Just amazing...

Where can I buy all that stuff...?? :lol: :bounce: :rofl:

[Doby]

Well, now that we know all the details, it should be easy for anyone to throw one of those together!

[properchopper]

Just amazing...

Where can I buy all that stuff...?? :lol: :bounce: :rofl:

I know how to get these :wink::spy::wink:

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[Darin Jordan]

I know how to get these :wink::spy::wink:

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Awww... but I already have THESE... :)

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And I have 4 Single-Cell "packs" of them also...

Can you say... READY FOR NOVEMBER??!! :beerchug:

[dmitry100]

Darin, btw how much were those packs? or were they free ;)

[Darin Jordan]

Darin, btw how much were those packs? or were they free ;)

I got them at the "Racer's Discount" price, $89.00/pack.

[dmitry100]

$89/pack seems a bit expensive, no?

They're not Graphene right? 0.5 IR sure seems a heck of a lot better than even the new graphene Revo's at ~ 0.8 IR or so.

[Darin Jordan]

$89/pack seems a bit expensive, no?

They're not Graphene right? 0.5 IR sure seems a heck of a lot better than even the new graphene Revo's at ~ 0.8 IR or so.

No, I don't think that's a "bit expensive". About inline with what a Turnigy Graphene 4S pack costs.

[dmitry100]

Darin, have you tried their 120c packs?

[Darin Jordan]

Darin, have you tried their 120c packs?

No, just the 60C and 80C...

[dmitry100]

What kind of IR do those 60c packs show?

Mine show 3.7 IR or so on most cells...

So those 80c are completely different tech.

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[Darin Jordan]

What kind of IR do those 60c packs show?

Mine show 3.7 IR or so on most cells...

So those 80c are completely different tech.

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We've seen 1.0mOhm or so... Depends on the temp.

What temp are you discharging them at, and at what amps??

[dmitry100]

About house temp so around 60-70*F

I was charging them at 7 amps

[martin]

General opinion on IR readings should be taken at 72 F .

[Darin Jordan]

General opinion on IR readings should be taken at 72 F .

Wouldn't you be more concerned about what they would be at operating temp? I know I would be...

[martin]

The 72F is used as a standard guide to compare lipos against one an other, otherwise the numbers will be all over the place. For example if you test a given battery at 72f & get say 2 ohms per cell & you test the same battery at 60f you will see a much higher figure reading.

[Fluid]

The internal resistance of various cell types is not linear over temperature changes. Cell "A" may give the same IR as cell "B" at 72*, but raise the temperature to 115* and it may have a significantly lower IR value. As a result, listing IR at 72* is of limited value for many of us. Yes, you can compare all cells at one temperature - but it may have little to do with cell performance at the temperatures seen in high performance FE boats.

I'd rather see IR values measured at 110*. Personally, I don't care what my pack's IR is when it's sitting in storage.



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[longballlumber]

So how do you control temp? During a discharge cycle the temp is going to fluctuate based on several variables. Wait isn't cell temp a bye product if IR... lots of variables that don't allow anyone to justify much; unless both parties are using the same equipment AND the same test procedure

[Darin Jordan]

So how do you control temp? During a discharge cycle the temp is going to fluctuate based on several variables. Wait isn't cell temp a bye product if IR... lots of variables that don't allow anyone to justify much; unless both parties are using the same equipment AND the same test procedure

Not that complicated... You wrap a heating blanket around the pack... when their temp reaches a certain point, you discharge them.

[dmitry100]

Darin, do you normally check IR during discharge or during charge?

CellPro seems to only allow me to see IR during discharge...

[MarkF]

To many people look at IR when it's not really giving you all the info. IR measurement is the pathway from the lipo to the tab. It doesn't take into account the quality of the lithium being used. Manufacturers see how many people are looking at IR numbers and now build packs that have low IR to fool people, but use cheaper lithium. You'll know if your lipos have a short life cycle or loose their good punch in a short period of time. To me, this make IR a useless tool. Most of you can tell when your packs are going bad when you run them.
Lipo optimum running temperature is 86 to 104 deg F. Basing your opinions on IR at 72deg is kind of pointless. Voltage under load and cycle life is whats important.

Mark

[properchopper]

To many people look at IR when it's not really giving you all the info. IR measurement is the pathway from the lipo to the tab. It doesn't take into account the quality of the lithium being used. Manufacturers see how many people are looking at IR numbers and now build packs that have low IR to fool people, but use cheaper lithium. You'll know if your lipos have a short life cycle or loose their good punch in a short period of time. To me, this make IR a useless tool. Most of you can tell when your packs are going bad when you run them.
Lipo optimum running temperature is 86 to 104 deg F. Basing your opinions on IR at 72deg is kind of pointless. Voltage under load and cycle life is whats important.

Mark

You get a good start. Second place, lane 2 and begin to chase down first place. He bobbles on a turn and you slide past. The CD's voice coming from the speakers utters the most beautiful words ever to a racer's ears : " YOU just put a move on so-and-so." You hold first until lap 5 and then on the back straight you start to slow down, imperceptibly but enough to be overtaken. The CD says : "First Place is slowing down for some reason".

Choose batteries wisely, this "slow down" will be unlikely and you can be a winner. Believe/wallow in numbers bantered about by keyboard pilots and zoom-zoom rookies and revel in their Kabuki Theater nonsense.

[dmitry100]

Do you guys use any sort of thermal pad (like the ones we use for PC's) between your Lipo Heater and the lipo's for improved heat transfer? since the lipo's are an uneven surface and all

[Fluid]

My LiPo heater is a standard "medical" heating pad from WalMart. I wrap it around the packs, it heats from both sides trapping the heat inside. I put it all in an insulated pizza bag, others just wrap it in a towel.



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[dmitry100]

ahh ok nice. Is there any accurate way of determining internal temp of the lipo's during/after a heating session?

[Fluid]

IR gun, the packs heat from the outside but 15-20 minutes seems like plenty. With some experience you'll find a blanket setting to match you target temp.

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