Horizon Hobby storefront

[Armyguy8675309]

Does anyone know if Horizon Hobby has an actual storefront in Champaign, IL? I'm in Springfield, IL and have thought about checking it out if they do.

[Brian James]

No, I'm sorry to say, unfortunately we don't.

[Napoleon_Tanerite]

That would be epic-- the Horizon Hobby mothership!

[David Eichstedt]

We do have one in Hamburg, Germany, at our EUDC in Elmshorn, if you're ever in the area!

[EEngineer]

Originally Posted by Brian James

No, I'm sorry to say, unfortunately we don't.

Brian, is there a reason why the EFLA335H ESC/SBEC not have the SBEC output voltage set to 6V output via the micro switch rather than 5V?

Other than the tail servo is only rated for 4.8 to 5V.

Have you guys analyzed the voltage undershoot charateristics of this SBEC?

Just curious.

[dribbe]

Originally Posted by EEngineer

Brian, is there a reason why the EFLA335H ESC/SBEC not have the SBEC output voltage set to 6V output via the micro switch rather than 5V?

Other than the tail servo is only rated for 4.8 to 5V.

Have you guys analyzed the voltage undershoot charateristics of this SBEC?

Just curious.

As you note! Tail servos are not rated for over 5 Volts.
SBEC is well tested. Every heli is test flown. Combo of Heli and SBEC is severley tested by pro class pilots (needs to be reliable on and FBL machine!).

David

[EEngineer]

Originally Posted by dribbe

As you note! Tail servos are not rated for over 5 Volts.
SBEC is well tested. Every heli is test flown. Combo of Heli and SBEC is severley tested by pro class pilots (needs to be reliable on and FBL machine!).

David

Do you have any voltage undershoot measurement data available to you, David?

Did your pro class pilots use an oscilloscope to measure the VUS of the EFLA335H SBEC?

One cannot measure the VUS condition without using an oscilloscope.

I have made my own VUS measurements and I wanted to compare them to yours...

[EEngineer]

bump....

[Brian James]

Originally Posted by EEngineer

Do you have any voltage undershoot measurement data available to you, David?

Did your pro class pilots use an oscilloscope to measure the VUS of the EFLA335H SBEC?

One cannot measure the VUS condition without using an oscilloscope.

I have made my own VUS measurements and I wanted to compare them to yours...

While I cannot speak for him, I don't suspect that DRibbe will be able to provide an answer, as this is considered proprietary information.

[EEngineer]

Originally Posted by Brian James

While I cannot speak for him, I don't suspect that DRibbe will be able to provide an answer, as this is considered proprietary information.

Brian, why would this be considered proprietary info?

Are you serious?

The voltage undershoot spec., which is characteristic of ALL SBECs whether Blade, Western Robotics, Align, Castle Creations, and many others, is considered proprietary info by Blade?

Please explain further, if you can.

Thanks

[GSPI]

Just a general comment, I think you might be asking for a specification of build design, no? If so that could be a proprietary item for anybody's equipment regardless of manufacturer. You can measure typicals and assess if units are similar and that would be the closest you could get to identifying specifications.

[EEngineer]

No, I asked exactly what I asked.....have they measured the VUS characteristics.....

Nothing more....

Please read the entire thread......

FWIW

[GSPI]

I thought I did.

[EEngineer]

GSPI......

Respectfully, my questions are addressed to the HH support gents......and not you...

[GSPI]

Ok sir, I went back to verify that I wasn't seeing things.... you asked an off topic question from the OP not about a physical store front in Illinois:

Originally Posted by EEngineer

Brian, is there a reason why the EFLA335H ESC/SBEC not have the SBEC output voltage set to 6V output via the micro switch rather than 5V?

Other than the tail servo is only rated for 4.8 to 5V.

Have you guys analyzed the voltage undershoot charateristics of this SBEC?

Just curious.

To which you were answered with:

Originally Posted by dribbe

As you note! Tail servos are not rated for over 5 Volts.
SBEC is well tested. Every heli is test flown. Combo of Heli and SBEC is severley tested by pro class pilots (needs to be reliable on and FBL machine!).

David

To which you further prodded for details of actual measurement data:

Originally Posted by EEngineer

Do you have any voltage undershoot measurement data available to you, David?

Did your pro class pilots use an oscilloscope to measure the VUS of the EFLA335H SBEC?

One cannot measure the VUS condition without using an oscilloscope.

I have made my own VUS measurements and I wanted to compare them to yours...

To which you got a response again from Blade guys in their off time:

Originally Posted by Brian James

While I cannot speak for him, I don't suspect that DRibbe will be able to provide an answer, as this is considered proprietary information.

and your response indicated some general statement that everybody has this measurement available:

Originally Posted by EEngineer

Brian, why would this be considered proprietary info?

Are you serious?

The voltage undershoot spec., which is characteristic of ALL SBECs whether Blade, Western Robotics, Align, Castle Creations, and many others, is considered proprietary info by Blade?

Please explain further, if you can.

Thanks

And with my general statement being thrown in for good measure and your statement which was answered above that they do measure it:

Originally Posted by EEngineer

No, I asked exactly what I asked.....have they measured the VUS characteristics.....

Nothing more....

Please read the entire thread......

FWIW

and I now have reread the whole thing again... so basically Blade has stated that they measure it and they are not going to give you specifics in a nutshell.

Have a good one and good luck with your quest for the information...

[EEngineer]

Thanks for your insight, GSPI

[EEngineer]

My question stands, Brian.......respectfully........

Let me ask this question...

What is the purpose of the 5/6 micro switch on the EFLA335H ESC?

From an engineering perspective, that each EFLA335H has such an SBEC output voltage micro switch, requires more manufacturing costs....and those costs incurred are not without reason......

FWIW

[Brian James]

Originally Posted by EEngineer

My question stands, Brian.......respectfully........

Let me ask this question...

What is the purpose of the 5/6 micro switch on the EFLA335H ESC?

From an engineering perspective, that each EFLA335H has such an SBEC output voltage micro switch, requires more manufacturing costs....and those costs incurred are not without reason......

FWIW

EEngineer,

Horizon Hobby considers all developmental technical and electronic data to be proprietary.

The purpose of this switch (as you are aware) is to change the ouput voltage of the SBEC, however it should be noted that the model(s) that this ESC was developed for are designed around the 5v switch setting.

Thanks!

[EEngineer]

Fair enough, Brian.....thanks for trying to answer my question.

I hope HH will not be upset with me making the EFLA335H ESC's SBEC performance characteristics public....especially with regards to the voltage undershoot transient characteristics....

This VUS transient is common for all SBECs, no matter who the manufacturer is, and is both demonstrable and repeatable.....and its presence cannot be denied.....and IMHO is not proprietary, just as the laws of physics are not proprietary.....

The VUS transient of the EFLA335H ESC's SBEC can be as much as 1.5V below the 5V and 6V output levels, which is dangerously close to the minimum operating voltage of the AR7200BX when using the 5V output setting.....

This is why I highly recommend that end users set the micro switch towards the center of the ESC(it's under the lead that connect to the AR7200BX) to provide a 6V output.......which gives one another 1V of headroom to avoid the possibility of a "brownout" condition.....especially when using aftermarket servos.

Then, either add a IN4001 "stepdown" diode for tthe tail servo...or obtain a connectorized version if one doesn't like to solder.

The EFLA335H SBEC has a switching frequency of 400 kHz, which is a good thing....

The VUS transient duration is around 350 to 400 nanoseconds, which is also good.....compared to many other SBECs......but even 350ns of < 3.5V will cause a brownout condition, which will cause the AR7200BX to re-boot as the voltage recovers...

It's power output capability is also good.....in excess of 3A continuous.......even when subjected to ambient temperatures in excess of 150 deg. F.

I am waiting for the 500X to become available so that I can characterize the 500X ESC's SBEC using the same test instrumentation and test fixtures...in order to provide the public with the necessary data.....

FWIW

[mechanicatwork]

really?? seriously?? Dude, relax and go fly!! Isn't that why we're all here anyways??