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Author Topic: Empulse Production Date?  (Read 12020 times)

Gavin

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Re: Empulse Production Date?
« Reply #45 on: February 29, 2012, 01:10:42 PM »
Of course I also thought yesterday would be the day of news...and the day before that...and even last week....so my track record isn't that great so far....


Gavin
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860

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Re: Empulse Production Date?
« Reply #46 on: February 29, 2012, 01:17:03 PM »
Quote from: protomech on February 29, 2012, 09:23:43 AM
...

There's a reason Tesla initially tried to build a two speed transmission for the Roadster. They didn't pull the transmission because of poor performance, they pulled it because they couldn't source a durable transmission. Then they bumped up their motor outputs to achieve their desired performance 0-60. I think the two-speed Tesla Roadster would have had significantly higher acceleration about 70 mph and a higher top speed as well.

IET durability is an open question as well. I wonder if this is causing some of the delay bringing the Empulse to the market .. though notably the Enertia Plus has also not been released.


The big durability issue with the Tesla transmission was that the shift was so hard that it triggered a huge jolt in the drivetrain.  It even tore the motor free of it's mounts in some of the early cars.  The big reason why the shift hit so hard was because of the significant gap between the ratios in the 2 gears.  If you've got an electric motor doing 12,000 rpm's at a certain speed, and you jam a gear shift with a large difference in ratio, then that electric motor has to slow down to 7,000 rpms really quickly to match the wheel rotation.  (I'm making up the RPM numbers -- not actual Tesla stats).  Something has to absorb the shock of that RPM change, and that force was being pushed into the transmission at the worst time -- right in the middle of a shift.

If that is done under heavy acceleration, the jolt to the drivetrain is pretty hard.  Same for down-shifting.  Now if you have much closer ratios (for example 6 ratios with just 1,000 rpm difference between them) then the rpm change on gear shifts aren't as big, and the torque of the forced RPM change in the motor to match the wheel rotation in the new gear isn't as harsh.  Here would be the RPM changes if you quickly shifted up through 6 gears, one at a time:

12,000 RPM -->
11,000 -->
10,000 -->
9,000 -->
8,000 -->
7,000 RPM

That's much easier to engineer a transmission to handle the stress than this:

12,000 RPM -->
7,000 RPM


It is entirely possible that if Tesla would have chosen a 6-speed like Brammo has chosen instead of a 2-speed transmission, Tesla might not have had the problems with breakdowns that caused them to go with the single speed.
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Virtually Yours

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Re: Empulse Production Date?
« Reply #47 on: February 29, 2012, 01:51:43 PM »
I'm going to go out on a limb and say that if Brammo is ready to put the Empulse in production then all this speculation is just that. I would like to believe that it's just a matter of crossing the T's and dotting the I's...
I'm more concerned with the possible changes to the bike and the final specs.
One seat or two?
Color options,
Dealer location and service,
Range, speed, price, etc.
« Last Edit: February 29, 2012, 02:04:29 PM by Virtually Yours »
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Gavin

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Re: Empulse Production Date?
« Reply #48 on: February 29, 2012, 02:08:06 PM »
We were told the Enertia and Plus are single seat, the Empulse will be a two seater.

I am anxious to see the new Empulse too. I really only wanted the Plus...but with the right changes, I could see going Empulse.

I like the higher speed. I like the two seats. I like the bigger battery.

I am not fond of sports bike styling. I would like to keep the price below 10k. I prefer the Enertia style and ride position...

Still leaning Plus, but could see going Empulse...maybe...

and of course I wouldn't kick it to the curb is I won the free Empulse....but I have a feeling that even if my name was pulled, that Brammo would go, "ohhhh, no, we can't do that", and would pull another name...and I wouldn't blame them...I would be sad, but I can see that it would look bad...

:)

Gavin
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protomech

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Re: Empulse Production Date?
« Reply #49 on: February 29, 2012, 02:32:12 PM »
Quote from: thespecialone on February 29, 2012, 12:41:33 PM
I know how frustrating waiting can be for Brammo fans, especially those who have preordered an Empulse......All I can say is that we are executing to our plan and remain on schedule - which includes our communication plan.....and that kicks into gear (pun intended) in March...including our much missed Monthly Newsletters....

I'm glad Brammo remains on schedule.. whatever that schedule may be. Hopefully we'll find out more soon.

I'm going to assume Brammo did not actually HAVE a communication plan, given the interesting but ad-hoc nature of BrammoBrian's tidbit drops and the dearth of information communicated to preorder customers.

Monthly newsletters and regular communication with Brammo customers would be fantastic.

Quote
The Enertia Plus is on track and you will be hearing more about that very soon..... its going to be an exciting year for Brammo riders......for Brammo ....and the motorcycle industry.

I just hope the March news reveal isn't a repeat of the above.
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860

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Re: Empulse Production Date?
« Reply #50 on: February 29, 2012, 04:04:34 PM »
Quote from: Gavin on February 29, 2012, 02:08:06 PM
...

and of course I wouldn't kick it to the curb is I won the free Empulse....but I have a feeling that even if my name was pulled, that Brammo would go, "ohhhh, no, we can't do that", and would pull another name...and I wouldn't blame them...I would be sad, but I can see that it would look bad...

:)

Gavin

I forgot about the free drawing thing.  Free would be cool.  But I think I put in a reservation 416 slots too late to be eligible.  It is only for the first 1,000 reservation holders, right?
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Gavin

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Re: Empulse Production Date?
« Reply #51 on: February 29, 2012, 04:12:55 PM »
Like many things, I do not know the answer to that...could be first 1000, could be all pre-orders before the drawing (whenever that is), it could be "set aside" and forgotten...

No idea...maybe we will know more in March.

Gavin
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EmpulseRider

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Re: Empulse Production Date?
« Reply #52 on: March 11, 2012, 08:54:18 PM »
Looks like we have something to look forward to on Wednesday!

From Facebook:
Me: ‎3 more likes to 6000! Celebrate with a teaser image of the Production Empulse? Cant say I didnt try :)
Brammo: Look out for Sue Carpenters story in the LA Times this Wednesday .....

And weren't they in LA a few weeks ago... :)

remember this:

Brammo: Early flight to LA for Empulse launch meeting - let the count down begin.....
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Phantom

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Re: Empulse Production Date?
« Reply #53 on: March 11, 2012, 09:06:44 PM »
Cool, I am looking forward to the news.
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protomech

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Re: Empulse Production Date?
« Reply #54 on: March 11, 2012, 11:50:25 PM »
Sounds like Wednesday is going to be a nice day.. unless someone slips the information a little early!

Quick, who here is drinking buddies with the LA Times folks?
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Gavin

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Re: Empulse Production Date?
« Reply #55 on: March 11, 2012, 11:56:41 PM »
The question remains... Empulse related or Enertia Plus related..or both.

We know the Plus is coming before the Empulse...

So will this article be about just the Plus, or the Plus and the Empulse? Or just the Empulse...though that seems unlikely.

Gavin
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EmpulseRider

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Re: Empulse Production Date?
« Reply #56 on: March 12, 2012, 12:35:46 PM »
Brammo really like their Wednesday announcements, dont they? Just about every big announcement has been on a Wednesday.
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Gavin

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Re: Empulse Production Date?
« Reply #57 on: March 12, 2012, 01:04:28 PM »
Anybody remember if Sue Carpenter has put out Brammo news before....I seem to think she has...

Off to the internets....

Gavin
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Gavin

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Re: Empulse Production Date?
« Reply #58 on: March 12, 2012, 01:09:16 PM »
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Brammofan

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Re: Empulse Production Date?
« Reply #59 on: March 12, 2012, 01:49:46 PM »
Susan Carpenter is kind of a natural when it comes to motorcycles in general and electric motorcycles in particular.  I know TTXGP has given her exclusives before.  I think that she was also originally scheduled to be the rider of the Brammo TTR in the exhibition lap at the Long Beach GP in 2010, but she couldn't make it at the last minute.
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