Search: Posts Made By: Matt Kirsch
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06-17-2010, 07:10 PM
Replies: 8
Views: 1,366
Posted By Matt Kirsch

Places like Nitroplanes and Banana Hobby sell...

Places like Nitroplanes and Banana Hobby sell what I call "Builder's ARFs." That is, they require some building skill to bring them up to what you'd expect from a more expensive outlet such as Hobby...
06-17-2010, 06:57 PM
Replies: 9
Views: 1,738
Posted By Matt Kirsch

This is an age-old question to which there is no...

This is an age-old question to which there is no one good answer, or ANY good answer, even.

People as a general rule "just want to fly." They want something akin to a country club where someone...
06-17-2010, 06:22 PM
Replies: 7
Views: 1,702
Posted By Matt Kirsch

If the motor is HOT to the touch, then you're...

If the motor is HOT to the touch, then you're drawing too many Amps.

It's very likely that you exceeded the rating of the battery, by a LOT. That's why it puffed.

Cooling air only goes so far....
06-17-2010, 06:18 PM
Replies: 2
Views: 1,605
Posted By Matt Kirsch

A 2S LiPoly pack will be a little more voltage...

A 2S LiPoly pack will be a little more voltage than a 7.2V (6-cell) NiCd pack.

It may be a problem. It may not be a problem. There's no way to tell from the specifications on the boat.

There...
Forum: Power Systems
06-14-2010, 07:16 PM
Replies: 9
Views: 1,918
Posted By Matt Kirsch

The 2815-2000 has a higher Kv rating (2000...

The 2815-2000 has a higher Kv rating (2000 RPM/Volt) than the 2814-1400 you were using before (1400 RPM/Volt).

A higher Kv motor will spin the propeller faster on a given battery. In this case,...
Forum: Power Systems
06-14-2010, 07:11 PM
Replies: 10
Views: 1,955
Posted By Matt Kirsch

That's kinda funny, because I've never had the...

That's kinda funny, because I've never had the Eflite color coding work out for me that I can recall. Red-to-red, blue-to-blue, yellow-to-yellow (or whatever) and the motor ALWAYS runs backwards!!!
06-10-2010, 07:54 PM
Replies: 102
Views: 16,688
Posted By Matt Kirsch

Like I said, contrived... Glow guys like to...

Like I said, contrived...

Glow guys like to throw the fact that they can fuel-and-fly almost continuously, while electrics have to have several packs to achieve the same result...

Yah, so when...
Forum: Power Systems
06-09-2010, 06:45 PM
Replies: 9
Views: 1,918
Posted By Matt Kirsch

You cut the power output of the motor by 1/2 to...

You cut the power output of the motor by 1/2 to 2/3 with that small prop. Power output of the motor is heavily dependent on the size of the prop the motor is trying to turn.

Pusher or tractor,...
Forum: Power Systems
06-09-2010, 06:42 PM
Replies: 3
Views: 1,447
Posted By Matt Kirsch

My answer to #2 is: Somewhere in the middle,...

My answer to #2 is: Somewhere in the middle, normally.

Contrary to popular belief, there is such a thing as an engine-out situation with multi-motor electrics. It's more common than you'd think....
06-09-2010, 06:36 PM
Replies: 23
Views: 4,490
Posted By Matt Kirsch

Sorry to be the doubting Thomas in this...

Sorry to be the doubting Thomas in this situation, but this is the first I've heard that TP packs "get better with age (and use)." I was at the TP booth at NEAT and Toledo, and they did not make such...
06-09-2010, 06:25 PM
Replies: 13
Views: 2,338
Posted By Matt Kirsch

Now, I've heard that a couple of weeks, up to a...

Now, I've heard that a couple of weeks, up to a month, is not a big deal. I regularly do this myself these days.

I've personally left them all winter, with no noticeable ill effects. My problem...
06-09-2010, 06:23 PM
Replies: 3
Views: 703
Posted By Matt Kirsch

Yup, "1P" and no P mean the same exact thing. ...

Yup, "1P" and no P mean the same exact thing.

We still parallel packs these days. Some people will do it to make use of a standard size pack (e.g. 3S 2100mAh) in larger planes. Stack 'em together,...
06-09-2010, 06:19 PM
Replies: 14
Views: 1,794
Posted By Matt Kirsch

Your package may have been delayed because of the...

Your package may have been delayed because of the LiPoly issue, anyway.

I'm sure Hobby King is under CLOSE scrutiny right now because they've been "illegally" shipping these large LiPolys via air...
06-09-2010, 05:59 PM
Replies: 102
Views: 16,688
Posted By Matt Kirsch

That article was relevant some time in the last...

That article was relevant some time in the last century. At the time it was written, the reasoning behind why glow/gas is better was contrived at best. We already had the technology to put electric...
06-07-2010, 06:07 PM
Replies: 118
Views: 17,772
Posted By Matt Kirsch

Guys, This is NOT going to stop the shipment...

Guys,

This is NOT going to stop the shipment of LiPolys from Hobby King or any other Chinese vendor.

It's just going to take longer to get the packs because they can't be shipped by air.

No...
06-07-2010, 06:06 PM
Replies: 19
Views: 6,762
Posted By Matt Kirsch

I spent $19.99 on a Brinks fireproof mini-safe...

I spent $19.99 on a Brinks fireproof mini-safe that's large enough to handle my biggest batteries (6S 5000mAh).
06-04-2010, 09:02 PM
Replies: 7
Views: 3,360
Posted By Matt Kirsch

Unless you're going to use both receivers...

Unless you're going to use both receivers simultaneously, there's no practical reason for having two in there.

As Skarkster says, the receiver will probably go bad when the plane is in the air,...
06-04-2010, 08:39 PM
Replies: 5
Views: 1,105
Posted By Matt Kirsch

Agreed. Just use a little more force. The door...

Agreed. Just use a little more force. The door will open.

You can either buy an OEM pack from your local hobby shop, or Tower Hobbies, or you can get a custom pack from places like Batteries...
06-04-2010, 08:31 PM
Replies: 118
Views: 17,772
Posted By Matt Kirsch

Nothing good... To the container of LiPolys. ...

Nothing good... To the container of LiPolys.

I am sure that container fires happen frequently aboard ship, halfway across the ocean. The beauty of the container is it's minimally vented and buried...
06-02-2010, 07:03 PM
Replies: 118
Views: 17,772
Posted By Matt Kirsch

Looks like I just eeked my last HK order in under...

Looks like I just eeked my last HK order in under the wire. It'll be 2 weeks this Friday when it arrived. Two 6S 5000mAh packs, four 3S 2650mAh packs.

We've been EXTREEEEEEEEEEEEEMELY lucky in...
06-01-2010, 08:55 PM
Replies: 24
Views: 18,964
Posted By Matt Kirsch

The Apprentice's stock motor is advertised as a...

The Apprentice's stock motor is advertised as a "Power 15" or at least it was last year.

There are differences in construction, with the Apprentice motor having plastic parts where the Power 15...
06-01-2010, 08:23 PM
Replies: 5
Views: 1,141
Posted By Matt Kirsch

Most aerobatic models, like Extras, Edges, Caps,...

Most aerobatic models, like Extras, Edges, Caps, etc. have what I'd consider "strip ailerons." Maybe I'm misinterpreting? To me a strip aileron goes all the way to the wingtip. The other type, "barn...
Replies: 158
Views: 27,233
Posted By Matt Kirsch

Unfortunately, there's nothing Horizon can do....

Unfortunately, there's nothing Horizon can do. The receivers are made in China, where they're not patented. The receivers are sold by a Chinese vendor on Chinese soil.

Buying "Made in USA" is a...
05-27-2010, 03:56 PM
Replies: 14
Views: 2,386
Posted By Matt Kirsch

stuart, it's about thermal mass and heat...

stuart, it's about thermal mass and heat transfer.

Soldering guns have very small tips, which is what allows them to heat quickly.

The problem is that the small tips don't contain much thermal...
Replies: 158
Views: 27,233
Posted By Matt Kirsch

Take note of the product description: "DSM and...

Take note of the product description: "DSM and DSM2 compatible"

Unless that's a mistake, these receivers are based on the old DSM(1) technology, which Horizon may well have licensed to HK's...
05-27-2010, 03:23 PM
Replies: 12
Views: 2,329
Posted By Matt Kirsch

Actually, you need to do a lot of pulling when...

Actually, you need to do a lot of pulling when applying Monokote.

The common mistake I see people make is they lay the covering over the area like a blanket, and start ironing.

The secret is to...
Forum: Power Systems
05-26-2010, 05:50 PM
Replies: 2
Views: 797
Posted By Matt Kirsch

Yup, the ESC will continue supplying 6V until...

Yup, the ESC will continue supplying 6V until something goes *piff* and lets the smoke out...
Forum: Power Systems
05-26-2010, 05:48 PM
Replies: 3
Views: 1,055
Posted By Matt Kirsch

In a nutshell, use whatever works. The default is...

In a nutshell, use whatever works. The default is usually sufficient.

Timing and PWM settings are primarily for getting an ESC and motor to play nice with each other when you get towards the upper...
Forum: Power Systems
05-26-2010, 05:45 PM
Replies: 6
Views: 8,154
Posted By Matt Kirsch

One thing, brushed motors are all but unheard of...

One thing, brushed motors are all but unheard of these days in electric RC flight. They simply offer no advantages whatsoever since the China industrial juggernaut started producing and marketing...
05-26-2010, 05:41 PM
Replies: 9
Views: 1,657
Posted By Matt Kirsch

...and don't try to charge or use them while cold.

...and don't try to charge or use them while cold.
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