My Veteran Lynx Trials, Tribulations, and Triumphs

[Marty Backe]

Against all odds, I received another unexpected EUC today, following yesterdays delivery of the Inmotion V14. Today it was the Veteran Lynx.
 

Another shoutout to Jason at EWheels for getting me this wheel. Full disclosure, I get to keep this wheel, but I did pay the airfreight shipping to get it ASAP.

Based on the weight there are no batteries installed but I'll do an unboxing anyway. Hopefully the batteries will arrive relatively soon.

[Paul D]

These are my next wheels depending on what you reviewers say about them.  Hope your recovering well from injury. 

[Marty Backe]

3 hours ago, Paul D said:

These are my next wheels depending on what you reviewers say about them.  Hope your recovering well from injury. 

Thank you 

 

[Marty Backe]

The Lynx batteries arrived. Time to assemble the wheel and go for a ride 

[Marty Backe]

 

[Marty Backe]

 

[Marty Backe]

 

Range

This was not a range test, but today I rode the Lynx about 22-miles to the beach to run some errands. I kept my speeds to ~25-mph as I wasn't sure how the battery would be performing. Once at the beach with ~65% battery I knew I could ride more aggressively. On the way home I did a lot of riding ~30-mph. This was suburban riding, in the traffic and stopping at the stop signs and traffic lights. Etc.

Ended the ride at 49-miles with 30% battery. I thought this was quite good.

 

Edited November 15, 2023 by Marty Backe

[Marty Backe]

Full Battery Charge

Just a note that with the default charger I'm getting a full 151.2-volt charge as reported by the app and smart BMS. This is a nice change relate to many of my new Begode/Extreme Bull/KingSong wheels where it's often difficult to get a full (134.4-volts) charge and the supplied chargers usually don't output the full voltage.

[Marty Backe]

Range Test

Today I completed my formal range test of the Lynx, repeating the same route and conditions that I do all my range tests.

Most recently I did a Master & Commander Mini range test and both achieved 57-miles (92-kilometers). This was my reference going into today's test of the Lynx.

Before turning on low battery mode I achieved ~59-miles (95-kilometers) but I was only experience low-battery beeps and no pedal tilt-back. After switching on the low battery mode I could continue riding (at ~22mph/35kph) down to 0% (no bars on the wheel display) and below. Beeps started again at ~108-volts and final tilt-back occurred at ~104.5-volts. Range was ~66-miles (106-kilometers).

Here are the stats

I have to explain this ad nauseam but Average Moving Speed is a calculated value that includes all the accelerating and braking that occurs during a ride for stop signs, lights, avoiding people, etc. Everything that you might imagine that happens over a 66-mile ride.

So no, I was not riding at 19mph (31kph). When I was moving at a steady pace I was striving to maintain 23-25 mph (37-40 kph) which I felt was a decent and fun speed for this ride and the speed that I'm currently doing my range tests at.

The range is consistent with what you would expect from any 2700wh wheel. I do not agree with Jack (Electric Dreams) that the Lynx has special low power capability as he was apparently told by Veteran, allowing it to achieve superior range. In fact, if the Low Battery Mode was not available than I was consider the range subpar for a 2700wh wheel.

You can view my EUC Tour for this test at https://euc.world/tour/627363083351103

The Lynx is now my favorite wheel to ride unless I need the range of my Commander Pro / EX30 / Master Pro.

[Marty Backe]

Lynx Suspension Springs

 

It was observed that a picture of some separate Fastace springs with the Lynx looked to be progressive. I reached out to Linnea and she just confirmed that the Lynx uses progressive springs and that the S and Patton do not.

This probably explains that my Lynx with the lightest 62-pound springs feels fantastic with my riding weight of 200-lbs (90-kg).

I do love the suspension ride of the Lynx. It feels better than all my other suspension wheels.

Edited November 17, 2023 by Marty Backe

[Cyberwolf]

Thanks for all the info and perspectives!  

One question: would you be able to begin capturing Density Altitude as part of your range-testing processes? (formal or informal, either way would be awesome!)

[Marty Backe]

41 minutes ago, Cyberwolf said:

Thanks for all the info and perspectives!  

One question: would you be able to begin capturing Density Altitude as part of your range-testing processes? (formal or informal, either way would be awesome!)

The altitude is captured on all of my rides (see range test above). I don't know what "Density Altitude" is and I'm sure I can't do that 

[Marty Backe]

Lynx Runs Hot

I've been noticing that the Lynx runs about 10° Celsius hotter that my more recent Begode/Extreme Bull wheels. Basically, always above 40°. I haven't done any extended climbs with it yet so I don't know if there are heat issues. But I'll be monitoring it.

I'd prefer a wheel that stay's in the lower 30's when not being stressed.

For instance looking at the Commander Mini range test data (same weather and range conditions as the Lynx test) it was always running in the 20's!

[wstuart]

30 minutes ago, Marty Backe said:

Lynx Runs Hot

I've been noticing that the Lynx runs about 10° Celsius hotter that my more recent Begode/Extreme Bull wheels. Basically, always above 40°. I haven't done any extended climbs with it yet so I don't know if there are heat issues. But I'll be monitoring it.

I'd prefer a wheel that stay's in the lower 30's when not being stressed.

For instance looking at the Commander Mini range test data (same weather and range conditions as the Lynx test) it was always running in the 20's!

If only you had a really steep, long hill nearby to test it on........

Because of your videos, I'm getting very close to sending in a deposit on one of these.  Any comment on how this rides compared to a Sherman S?

Edited November 17, 2023 by wstuart

[Cyberwolf]

2 hours ago, Marty Backe said:

The altitude is captured on all of my rides (see range test above). I don't know what "Density Altitude" is and I'm sure I can't do that 

Density Altitude is used to measure how "thick" the air is, and is basically an aggregate of altitude, pressure, temperature, and humidity...

It's used for all kinds of things, and there are plenty of apps for tracking (would be awesome if euc.world tracked this!). 

I think it would be a great data point for your range reviews, as it's a vastly better metric than altitude alone for figuring how to translate/baseline the range test results in a geographically-agnostic fashion....

Anyway, just a thought...Thanks!

Edited November 18, 2023 by Cyberwolf

[Tomallo]

9 minutes ago, Cyberwolf said:

Density Altitude is used to measure how "thick" the air is, and is basically an aggregate of altitude, pressure, temperature, and humidity...

It's used for all kinds of things, and there are plenty of apps for tracking (would be awesome if euc.world tracked this!). 

I think it would be a great data point for your range reviews, as it's a vastly better metric than altitude alone for figuring how to translate/baseline the range test results in a geographically-agnostic fashion....

Anyway, just a thought...Thanks!

What would it be useful for? To know how much aerodynamic drag he has while riding? I just checked what this is on Wikipedia, first time that I heard about it, so only guessing

[Cyberwolf]

27 minutes ago, Tomallo said:

What would it be useful for? To know how much aerodynamic drag he has while riding? 

Exactly so.  It allows one to much more accurately predict/track how much general/baseline drag there is, thus providing a range "handicap" (for lack of a better way of putting it).

For example, I notice huge change in wind-drag and range depending on if I ride with arms tucked in or not.  Even then, and either way, there's a basic level of "drag" to the air, and my guess is that there may well be measurable impact on range depending on just how much there is...e.g. - I would posit that the air where I live is significantly thinner than where Marty lives, and all else being equal, I would expect some greater range here as a result.

DA provides a simple and direct metric to baseline this effect

Edited November 18, 2023 by Cyberwolf

[Marty Backe]

39 minutes ago, Cyberwolf said:

Density Altitude is used to measure how "thick" the air is, and is basically an aggregate of altitude, pressure, temperature, and humidity...

It's used for all kinds of things, and there are plenty of apps for tracking (would be awesome if euc.world tracked this!). 

I think it would be a great data point for your range reviews, as it's a vastly better metric than altitude alone for figuring how to translate/baseline the range test results in a geographically-agnostic fashion....

Anyway, just a thought...Thanks!

I kind of figured that's what you were asking but frankly, unless that's something that existing apps provide, I can't imagine putting time and effort into gathering it. I appreciate your desire from a geek perspective, but I only have some much time and life is getting short 

[Marty Backe]

2 hours ago, wstuart said:

If only you had a really steep, long hill nearby to test it on........

Because of your videos, I'm getting very close to sending in a deposit on one of these.  Any comment on how this rides compared to a Sherman S?

Oh, I'll be testing more, but I find it interesting that it runs on the hotter side relative to many other wheels.

[UPONIT]

5 hours ago, Cyberwolf said:

For example, I notice huge change in wind-drag and range depending on if I ride with arms tucked in or not.  Even then, and either way, there's a basic level of "drag" to the air, and my guess is that there may well be measurable impact on range depending on just how much there is...e.g. - I would posit that the air where I live is significantly thinner than where Marty lives, and all else being equal, I would expect some greater range here as a result.

Define "huge" please.

I'm familiar with low oxygen concerns at higher altitudes.  But is the air really thin enough to make a measurable difference in vehicle ranges?  Especially differences large enough to affect either purchase decisions or comparability of different testers' range test results?

Fascinating.

 

[fbhb]

9 hours ago, Marty Backe said:

Oh, I'll be testing more, but I find it interesting that it runs on the hotter side relative to many other wheels.

Of interest @Marty Backe is that the Lynx spec sheet states 2 different temperatures for the overheat alarm, one for each of the 2 separate boards.

The upper board alarms @ 85 degrees C, whereas the lower board alarms @ 105 degrees C, so 10 degrees C, or so, higher than the more usual 80/85 degrees C we usually see for our overheat alarms.

It is possible that Leaperkim are taking their temperature readings from the lower board of the Lynx, which makes what could be a normal reading appear higher than we are used to?

Can you confirm this with Linnea?

Edited November 18, 2023 by fbhb

[Seba]

15 hours ago, Marty Backe said:

I've been noticing that the Lynx runs about 10° Celsius hotter that my more recent Begode/Extreme Bull wheels. Basically, always above 40°. I haven't done any extended climbs with it yet so I don't know if there are heat issues. But I'll be monitoring it.

It's a matter of temperature sensor location. I wouldn't worry about Lynx giving bit higher temperature readouts, as it directly measures MOSFET temperature (same with Sherman S and Patton), while Begode wheel in most cases report IMU chip temperature, which is way colder that MOSFETs. If you take a look at second page of EUC World, you'll notice that actuall there are three temperatures measured at different points - microcontroller, IMU (gyroscope) and MOSFETs (this temperature during ride will be highest and it's the key temperature to monitor, it's also the temperature shown on the main screen). Temperatures of 60 - 80 Celsius are nothing harmful for MOSFETs, so nothing to worry with max temperature of 43 °C that you experienced during a range test  

Another thing worth to note is that MOSFETs that are rated for higher voltages have also higher drain-source resistance, what may increase heat losses. But it's not a general rule, especially that higher system voltage translates into reduced currents flowing thru the motor windings.

[Marty Backe]

14 hours ago, Seba said:

It's a matter of temperature sensor location. I wouldn't worry about Lynx giving bit higher temperature readouts, as it directly measures MOSFET temperature (same with Sherman S and Patton), while Begode wheel in most cases report IMU chip temperature, which is way colder that MOSFETs. If you take a look at second page of EUC World, you'll notice that actuall there are three temperatures measured at different points - microcontroller, IMU (gyroscope) and MOSFETs (this temperature during ride will be highest and it's the key temperature to monitor, it's also the temperature shown on the main screen). Temperatures of 60 - 80 Celsius are nothing harmful for MOSFETs, so nothing to worry with max temperature of 43 °C that you experienced during a range test  

Another thing worth to note is that MOSFETs that are rated for higher voltages have also higher drain-source resistance, what may increase heat losses. But it's not a general rule, especially that higher system voltage translates into reduced currents flowing thru the motor windings.

Thanks. Good information.

I'm certainly not worried about 43° but I'm hoping that when I actually stress the wheel the temps don't climb into the 70's 

[RagingGrandpa]

On 11/17/2023 at 3:59 PM, Cyberwolf said:

capturing Density Altitude as part of your range-testing

Airport weather history is easy to dig up... Marty's Lynx range test was about 3pm on Nov 16th, so that's: 

Time	Temperature	Dew Point	Humidity	Wind	Wind Speed	Wind Gust	Pressure	Precip.	Condition
2:53 PM	68 °F	57 °F	68 %	VAR	3 mph	0 mph	28.94 in	0.0 in	Fair
3:53 PM	69 °F	57 °F	65 %	CALM	0 mph	0 mph	28.94 in	0.0 in	Fair
4:53 PM	67 °F	56 °F	68 %	CALM	0 mph	0 mph	28.95 in	0.0 in	Fair

 

https://w1.weather.gov/data/obhistory/KPOC.html 

[Paul D]

On 11/17/2023 at 5:44 PM, Tomallo said:

What would it be useful for? To know how much aerodynamic drag he has while riding? I just checked what this is on Wikipedia, first time that I heard about it, so only guessing

If your flying in a helicopter it’s useful, not important for euc riding.