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Century Helicopter . MTA Hobbies . Model Rectifier Corp

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Radio - JR & Spektrum DSM > How did you balance the DX7
 
 
Lockheed
Senior Heliman
Location: Qc, Canada

Just to confirm it does balance perfect, the antenna being slightly lower
than the screen part, I would say about 5 degree...
12-19-2006 Over year old.
 
 
Zaneman007
Key Veteran
Location: Texas - USA

So, If you want to replace the old hook, all you have to do is unscrew the factory one? It is that easy?
12-20-2006 Over year old.
 
 
Lockheed
Senior Heliman
Location: Qc, Canada

Not really, but if you go up a bit on this thread, you will read : about an hour of easy work...
12-20-2006 Over year old.
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

IMO the REAL fix here would be to somehow relocate the battery to the top of the case. This would require Spektrum to modify the design of the case rather than using the same case as the 7202.

I'm thinking about adding some lead weight to the top/back of the TX. The extra weight shouldn't bother me too much since I fly with a neck strap.

...yep...
12-20-2006 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I've had heavy radios and prefer these light weight ones - Moving the attachment point is more sensible to me.
12-20-2006 Over year old.
 
 
jschenck
Elite Veteran
Location: La Vista, NE.

The issue I see with moving the attachment point is that if you put pressure on the TX it will tip at a point where I don't expect it to - the "CG" is changed. Most TX's have the CG in line between the gimble's.

I think the best solution is to redesign the case to move the battery to the top of the case putting the CG back where I expect it. Adding weight is not an ideal workaround but with a neck strap it shouldn't be too big of a deal.

This is all just conjecture for me so far since mine is wrapped up and under the Christmas tree. Hope I get it before the dogs pee on it. I may change my mind after using it with 8oz of weight attached, we shall see!

...yep...
12-20-2006 Over year old.
 
 
nkinney
Heliman
Location: colorado springs, co - usa

Why not use a lighter battery like an 1100ma 3s lipo. You can add a dean’s connector between the battery and radio connector. I’d add a diode on the radio side to drop the V. Then unplug the deans and charge it on a lipo charger. The lighter battery should help the balance without dropping run time too much.

-Neil
12-20-2006 Over year old.
 
 
hrosee
Senior Heliman
Location: Richardson, Texas

Are you guys really serious about all this balance stuff?

I sold my 9C and started flying with the DX7. Sure it felt a little different the first couple of times but after many flights it just becomes natural. Like anything else you get use to it and it's a non-issue.

I think you are going to a lot of trouble for nothing.

Just my opinion.
12-20-2006 Over year old.
HOMEPAGE  
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

It makes quite a difference in comfort to me if I don't have to hold a position myself and it just hangs perfectly level on it's own hands off - I can relax my hands and have a nicer feel on the controls - My DX6 does this with the alternate attachment point I gave it and it's quite nice -

That was the second thing I tackled after swapping out the gimble springs.
12-20-2006 Over year old.
 
 
hrosee
Senior Heliman
Location: Richardson, Texas

I guess because the radios DX6/DX7, (I have both) are so light it really hasn't been a concern to me. Now if it were as heavy as my 9C was then it would be a different story.

The point is that you can get use to it and never think about it. But if it bothers you then you need to take action. I am still so new at flying Hel's that I am too darn nervious to worry about the balance of the heli. Hell, I am just trying to make it go where I want it to go.
12-20-2006 Over year old.
HOMEPAGE  
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

I think you're missing the point of not having to "hold" the radio level - It should rest level naturally - If you're going to "hold" the radio anyway then you don't really have much use for a strap.
12-20-2006 Over year old.
 
 
miami6
Senior Heliman
Location: 32.293808, -64.775914

this one is my friends
02-05-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Here's my solution -

02-06-2007 Over year old.
 
 
perfesser zero
Key Veteran
Location: Dublin, VA., USA

Captain Chaos...

That's cool! I think you should market that, or maybe sell the idea to Spektrum and maybe get a some royalties out of it...yeah right!
Anyway, best idea I've seen yet. Nice and clean, as it folds down out of the way for those of us who hold their radios as they fly.

Later...

Scott!

Tiger 50 - OS 50SX-H
Hawk Sport - OS 37SZ-H
Raptor 30 - OS 37SZ-H
JR 10X/R950S
02-06-2007 Over year old.
HOMEPAGE  
 
 
heliz4art
Senior Heliman
Location: San Diego, California

Captain Chaos
That is an excellent solution! What material did you use, just spring wire with two small holes in the case?

Very neat.
02-06-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

That would probably work too and maybe be simpler than what I did if you could know exactly where and what angle to drill - But mine is actually 18 or 20gauge? electrical wire with knots tied at the ends on the backside of the face plate - I dismantled the radio and removed the silver face plate drilled the holes fed the wire tightly tied the knots and reassembled it all -

I used this same wire in a similar fashion on my DX6 and it's still holding strong after a year of use -

By removing the face plate I found it'd actually be kinda tricky to just blindly drill into it for hitting some of the mounting screws etc - In fact the holes I drilled are right up against screws that hold the face plate from the backside - I didn't actually have much choice where to drill in that general area because of two sets of screws occupying that area back there.
02-06-2007 Over year old.
 
 
heliz4art
Senior Heliman
Location: San Diego, California

Thanks for the feedback. It would be pretty risky just to drill in from the outside randomly.

Ho much work is it to remove the faceplate etc to do it the way you did?
02-06-2007 Over year old.
 
 
Micro-Maniac
Elite Veteran
Location: Pasco,Washington Formerly: Captain Chaos

Only 26 screws
2 screws at the bottom corners of the silver face plate
6 screws to detach the back plate
1 screw to detach the battery connection to fully free the back plate
4 screws to detach the rf deck (unplug antenna)
3 screws to detach the power switch
8 screws to detach both gimbals
2 screws kinda hidden below the base of the lower rf mount
Face plate can finally be detached all by itself
02-06-2007 Over year old.
 
 
Eury
rrProfessor
Location: Ankeny, IA, USA.

Quote 
Only 26 screws

LMAO

At what number does the term "only" cease to apply?


Nick Crego
I swear to God, I'll pistol whip the next guy that says Shenanigans
02-06-2007 Over year old.
 
 
Sceaduflyer
Senior Heliman
Location: Standish, ME

I just put some lead weights inside the top of the radio. It works just fine and took me less than 10 minutes.

It wasn't me, it was my thumbs!
02-07-2007 Over year old.
 
 
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PowerHelis . JR-Spektrum . Gyro Hobbies

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Radio - JR & Spektrum DSM > How did you balance the DX7
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