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HomeAircraftHelicopterRadio - Spektrum DSM › Are you unhappy with the weight of your DX7?
03-05-2008 01:56 AM  10 years agoPost 1
wannaflyguy

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Central, PA

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When I first received my DX7 I was a little disappointed with weight. It felt too light... much more at the top of the TX than the bottom.

Last night, I opened it up and installed some tire balancing stick-on lead weights in the open space near the antenna cavity to help improve the feel. I like the result. Here are some pictures of how I did it.

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03-05-2008 02:07 AM  10 years agoPost 2
jimboflies

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Beaumont, Texas;

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Hope they dont come loose when flying and short something out!

EP8 EX twinring frame
Quick of Japan
EP8v2 EX
EP9

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03-05-2008 02:45 AM  10 years agoPost 3
wannaflyguy

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Central, PA

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I figured if they could stay on a wheel at 90mph, they should do fine at .001mph.

I hope I'm not wrong... but it feels good!

I had one mounted on the front of my Century HB years ago, and it stuck like stink on a skunk. Even after some severe crashes, the weight wouldn't fall off. Some pretty good sticky those tire guys use.

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03-05-2008 05:11 AM  10 years agoPost 4
HeliSmith

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Chico, CA

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Intawesting.. I use a strap so I guess I find it to burdensome to hold already.

Team AmainHobbies/ProTek

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03-05-2008 07:43 AM  10 years agoPost 5
Percula

rrApprentice

South UK

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I figured if they could stay on a wheel at 90mph, they should do fine at .001mph.
I'd think that one through again if I were you? They are normally found on the inside of the wheel are they not?

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03-05-2008 10:54 PM  10 years agoPost 6
wannaflyguy

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Central, PA

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percual, both sides actually. but i'm gonna give this a go and report back on this in the future. like i said, i had used these before and nothing would make them fall off of my heli... even hard crashes.

right now, the TX feels very nice in my hands.

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03-06-2008 07:14 AM  10 years agoPost 7
ez2bgman

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N'awlins, LA

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I figured if they could stay on a wheel at 90mph, they should do fine at .001mph.
I'd think that one through again if I were you? They are normally found on the inside of the wheel are they not?
Why would he have to think this through? It is obvious from the pics that he attached the adhesive backed weights to the inside of his DX7. How much force do you think he is going to subject his DX7 too? I doubt that he will be swinging it over his head from the neck strap.

Hope this helps with the balance issue inherent with the DX7. I just bought a neck strap balancer to attach to the original eyelet, when I had the DX7. Now I use the GForce balancer on my X9303.

Gary
Hot Girlz in da gallery

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03-06-2008 04:13 PM  10 years agoPost 8
JuanRodriguez

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The Villages, Florida

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Why would he have to think this through?
Have you ever heard of Mr. Murphy ??

I for one don't have to think about it because I would never do it. That would be the first time the adhesive would fail for some reason and ruin your day. I can imagine what Horizon would say if it were ever sent in for warranty work......."You put wheel weights where ????"

No, I'm not being paranoid but would like to refer you to an old saying, "There's never a problem until there is a problem".......

Your mileage may vary......

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03-06-2008 04:56 PM  10 years agoPost 9
wannaflyguy

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Central, PA

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wow, so much pessimism.

JuanRodriguez, have you ever heard of Mr. Edison?

Whatever happened to tinkering around and doing things differently? What's wrong with testing and innovation? Some ideas work some don't. I'll find out on this one.

Thomas Edison once said, "There ain't no rules around here, we're trying to accomplish something." "When I have fully decided that a result is worth getting I go ahead of it and make trial after trial until it comes."

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03-06-2008 05:16 PM  10 years agoPost 10
WAFlowers

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Clearwater, FL - USA

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I'd think that one through again if I were you? They are normally found on the inside of the wheel are they not?
You are thinking of the centrifugal force that would keep the weights "pressed" against the inner rim of the wheel I think. Certainly correct as far as that goes. However there are forces operating in other directions (nominally at a tangent) as the wheel accelerates and decelerates (negative acceleration) as well as side forces in "violent" meneuvers. Not to mention the 1g force if the car stops with the weight "up".

I subject my vehicle to "violent" meneuvers monthly during autocross (a form of time trial) competitions. No wheel weights lost ... yet!

Despite all the above, wheel weights have been known to (occasionally, not often) come off. My theory is that it is due to not preparing the attacment location (e.g. cleaning the wheel) prior to sticking them on, but that is only a theory.

On the issue of whether or not to use these to balance your tx I'm going to sit on the sidelines for now.

--
Bill

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03-06-2008 06:28 PM  10 years agoPost 11
JuanRodriguez

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The Villages, Florida

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wow, so much pessimism.
No pessimism here.....I call it being cautious.....ok, I'll give......overly-cautious perhaps....

Experience over the years has taught me to become that way. Initially, things may "appear" to be a great idea but then when something unforseen happens, that's when the sh*t hits the fan....

I honestly hope it never happens to you and that your weights never pop off at all......

It it were me and I really wanted to stick (pun intended) to your idea, I would add a small bead of "goop" as a fillet between the edges of the wheel weights and the radio case..... that way for sure they wont come off....

But then again, you can roll the dice and take your chances......it's your radio and aircraft.......hopefully no one will get hurt IF something does happen while you're flying....... Oh, sorry.....there I go again with the pessimism......

PS-- And remember that things can get pretty warm during those hot summer days just with the high ambien temperatures of mid-summer.....

And even Mr. Edison will tell you that heat CAN AND DOES soften adhesive materials.....

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03-06-2008 11:46 PM  10 years agoPost 12
wannaflyguy

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Central, PA

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JuanRodriguez

good points.. well taken. The goop is a good idea, and I too agree with the safety priority. Safe is good.

Will report back on this thread as we continue the months ahead.

I flew this afternoon... man, it felt good in my hands!

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03-07-2008 12:02 AM  10 years agoPost 13
MarshallB

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Middle Arkansas

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Here is not what to do though!!! Do not leave your radio out in the sun, guess what happens, the dbl sided sticky tape can become detached. You should check it every now and then to be sure..

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03-07-2008 12:07 AM  10 years agoPost 14
RappyTappy

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Traveling the USA

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Are you unhappy with the weight of your DX7?
No.

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03-07-2008 12:18 AM  10 years agoPost 15
michael88997

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Lewisville,Tx

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No.
lol me either... after a near crash because my neckstrap broke and i almost dropped my remote i now fly without a neck strap and i don't even notice the weight

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03-07-2008 01:21 PM  10 years agoPost 16
Pinecone

rrKey Veteran

Maryalnd

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On cars, one normally adds a piece of tape, racers tape or the metal duct tape to make sure you don't shed them. And yes, they have been known to come off.

A piece of tpae would do two things. Add a layer of security to the installa nd also insulate the lead if it does fall off.

As for balancers, I really like the one from http://www.k2heli.com Works well and also acts as a switch guard to prevent accidently turning the Tx on or off.

Terry
Blade CP Trex 450 SE
QJ EP8v2 EX Gaui Hurricane 550
Vibe 50 Bergen Intrepid Gasser

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03-07-2008 08:02 PM  10 years agoPost 17
mmc205

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PA - USA

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Hi all,
as a design engineer that designs machinery day in/day out, juan has a point. It comes down to cost/benifit. The cost of ensuring the wheel weights would not come off is only a few minutes of time and maybe some extra epoxy/ca something of that sort. The benifit is not having your $1000+ heli fall from the sky. In designing, you add as many layers of redundancy as needed until the risk/cost becomes equal to the benifit. If the risk of the weight coming off is 1% and the most likely result is a $400 crash, well then a $4 fix in time or money is well justified. sorry, i rambled....

***Logo 600 vbar***Henseleit TDR vbar***

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03-07-2008 08:59 PM  10 years agoPost 18
Eury

rrProfessor

Dover NH

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Just to add to the argument, I loaded my DX7 down with a lot more stick on lead weights than the OP, and flew with it from a couple of days after the release of the DX7 until the day my LHS finally got my X9303 in, and never had an issue. They didn't come unstuck, short anything out, or do anything besides give the transmitter a better, well balanced feel. From winter flying in 10deg temps, to the middle of summer when it was over 100, I never babied it, just threw it in the case and the end of the day, and left the case in my van that I transported my planes in for weeks on end (think how hot a car gets in the summer), all without a problem. When I sold the TX, I opened it up, and removed all the weights that were still stuck exactly where I put them.

Nick Crego

Citizen #0168

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03-07-2008 09:13 PM  10 years agoPost 19
JuanRodriguez

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The Villages, Florida

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all without a problem.
That's great, Nick..... as the saying goes, "There's never a problem until there's a problem".......

The OP will probably never have a problem either but the argument has been "why take the chance" that you'll be the first ??

Different strokes for different folks is what makes the world go round.....

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03-07-2008 11:11 PM  10 years agoPost 20
wannaflyguy

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Central, PA

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argument?, argument?, argument?, argument?, argument?, argu..., argument?, you want to talk about argument? argument?, argument?

Eury, thanks for confirming my initial idea. Today my DX7 feels great, and I'm confident that no "what ifs" will occur.

argument?, argument?.....

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HomeAircraftHelicopterRadio - Spektrum DSM › Are you unhappy with the weight of your DX7?
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