mr_matt

My Feedback: (10)

I generally put zip ties around the struts so they cannot "compress". I have found a certain lack of repeatability with these springs on at least one plane and it affected the measured CG by about a 1/4 inch. No big deal but the zip ties make the issue go away 100%

COL J

Hi Gasper, What is latest C.G. Meter software version. Mine says v.1.3, is this current? Thanks John

JimBrown

My Feedback: (2)

Latest version is v1.4. Available here: https://www.xicoy.com/catalog/produc...roducts_id=365

...jim

COL J

Thanks Jim!!

olnico

We sell the CG machine with a complete manual including a full description of advanced professional ways of achieving CG, calibration sheets, load and trim sheets, troubleshooting procedures and lots of pictures, .
It is a 50 page reference manual that I wrote over the course of two years, available as a part of the Ultimate Jets service to our customers.


It is indeed a serious stuff and I wrote a professional manual to go with it.

Viper1GJ

My Feedback: (20)

Gasper,

I do not find v1.4 version the Apple App Store. The latest version I see is 1.0.6.

Is v1.4 available on Apple App Store for use on the iPad with the bluetooth version the CG Meter?

Thanks,
Gary

Gaspar

Last apple version is 1.0.6. Last stand alone display version is 1.4.

gaspar

Viper1GJ

My Feedback: (20)

Ok, got that one. Thanks for the update info.

Gary

JimBrown

My Feedback: (2)

Recently ordered and received the angle sensors for the CG machine. Loving them!

But, I do have a "feature" request. If one selects distance in the setup screen, it would be nice to see distance instead of angle in the display screen. Perhaps selectable on that screen. Reason I ask is that the jet I'm setting up has, in the manual, distances for elevator/flap compensation (as well as all the other distances for full throws.)

Thanks,
...jim

sirrom

My Feedback: (4)

Can someone please tell me what is the minimum version of IPAD and/or iOS can support the CG Electronic device. Every time I try and hook it up to my IPAD I get a "CG Meter Not supported" message. Any help would be greatly appreciated.

Gaspar

The supported devices are:

iPhone

• iPhone 4s
• iPhone 5
• iPhone 5c
• iPhone 5s
• iPhone 6
• iPhone 6 Plus
• iPhone 7
• iPhone 7s

iPad

• iPad, 3rd generation
• iPad, 4th generation
• iPad mini
• iPad mini 2
• iPad mini 3
• iPad Air
• iPad Air 2

Gaspar

Gaspar

Hi Jim,

You should enter the distances listed in the manual of the airplane in the setup screen. Then in the measuring screen of the angles you will see the blue lines that are the distances you entered converted to angle. When the Surface deflection is below the value of the distance yo entered, the line is of yellow color. If it is exactly the distance you entered, it is green, and if it is higher, red. You don't need the exact measure, just adjust the travel to have the lines in green color at full deflection.

Gaspar

JimBrown

My Feedback: (2)

Hi Gaspar,

I'm aware of all that, and have been using it that way quite successfully.

What I was getting at is that on this particular jet, in addition to the full throws being specified, there are also trim throws specified for the elevator for each flap setting.

For example, the manual states that the up elevator throw is 45 mm and the down elevator throw is 25 mm. It also states that when the flaps are at full deflection, the elevator should be trimmed up 10 mm. Because I can only see the actual angle on the display screen, once I have set the full throws using the blue line, I have to go back into the settings screen and change the up travel to 10 mm from 45 mm, save it, then go back to the display screen and adjust to the blue line.

If I could see the distance instead of the angle on the display screen, it would make things a lot easier.

It's not the end of the world, it's just a bit of an annoyance.

Thanks for listening,
...jim

RichardGee

My Feedback: (156)

OK, I just acquired a new Xicoy CG unit from Chief Aircraft... arrived this week. As you can see it has the latest software rev. Just to become familiar with the unit I tried it on my Taurus. This airplane is perfectly balanced already. The unit does display the aircraft's weight accurately, but LOOK AT THE CG READING. Way off. I tried cycling power, different battery, changing from pounds to grams, and still the CG/weight required to balance is wacked out. Suggestions?

siclick33

Are you sure your setup numbers are correct? 4 inches seems a long way for the c.g. to be in front of the main wheels.

HarryC

My Feedback: (1)

You have set mains to CG as 100mm, I suspect it is more likely to be 10 to 30mm

RichardGee

My Feedback: (156)

OK, I rechecked and indeed my estimate was substantially different from actual CG. See the photos. Distance of mains to CG is more like 47mm or 1.85 inches. Despite entering a much more accurate CG location, the CG/weight required to balance is still totally wacked out.

JimBrown

My Feedback: (2)

You have entered the distance to where you add/remove weight to be the same distance as where the CG is. This is causing the CG machine to think you want to add or remove weight right where the CG is, hence the ridiculous numbers. Set the third distance parameter to be the distance from the mains to where you actually want to add or remove weight. Probably somewhere near the engine.

...jim

siclick33

You have the point at which you want to add weight at 47mm, which is the same as the cg (and why it is showing so much weight). Change that figure to where you want to put the weight (distance to nose or tail usually).

RichardGee

My Feedback: (156)

BINGO! Thanks also to siclick33 for the same observation. Very glad it was something I was doing wrong. Believe it or not, There WAS a method to my madness.... assuming my CG was already spot on, I thought that if I were to add weight, I would want it DIRECTLY ON THE CG.... but now I understand what this was doing to the calculations. After entering my weight addition at about 290mm forward of the mains, the device told me my Taurus is Nose-heavy and instructed me to remove 0.21 pounds from the specified point. I can accept that it thinks the model is nose heavy. I will leave it as-is since it is SO stable at this balance point. OK... now onto the Gee Bee

Zeeb

My Feedback: (41)

Uh..... one other thing coming from a full scale guy who's weighed full scale aircraft; your model does not look like it's level but nose up.

HarryC

My Feedback: (1)

Do not take your measurements from the plan. If the legs on your model are angled slightly differently, if the weight of the model causes them to bend a little further backward, if the angled backwards legs are longer or shorter than drawn on the plan, then the real distance from mains to CG will be quite different to what the plan shows and the CG calculation will be wrong. Always measure the real model.

RichardGee

My Feedback: (156)

Optical illusion... if anything, this plane sits slightly nose down.

Zeeb

My Feedback: (41)

Okay good deal because it is really important that they be level. It's easier on a full scale as they have "waterlines" in different places so all you do is put a level on those to check both axis's of the A/C.

t1callahan

Hello all. I'm hoping you can help. I just received the xicoy, and am having trouble getting the Xicoy to match what my trusty old great planes balancer is telling me. I don't have large scale planes, most are average .60 size, though I do have a 16 pound biplane that is difficult to balance on the GP balancer. When I balance my Tower 60 Kaos on the Xicoy at 4.5" back, it tells me that my main batter should be moved forward about 1.5 inches and the receiver batter also about 3 to 4 inches forward. Then to check it against the GP balancer, it tells me Im way nose heavy I need to add about 1.5 ounces to the tail to get it to balance.
I did zero out the scales. And although I didn't "calibrate", I did validate with a roughly 5 LB weight, that all 3 scales measured exactly the same. I did a balance 3 separate times on 3 separate days, thinking that maybe my measurements are off. I attaches some photos of my process. The one thing that I did, that could in hindsight probably not measured right is the distance to the CG point from where I measured out on the wing, which is a point closer to the gear, away from the fuselage, where CG is normally measured. Now that Im looking at the diagram "attached", when you have a back swept wing, the CG point gets closer to the LE as you move away from the fuselage. And I think that i'm probably not measuring the CG point correctly when I am by the landing gear. Once I figured out where the CG point was, I used a plumb line to help measure. See images. If the CG point I want is 4.5 inches near the fuselage, how do you figure out where that would be near the gear, which is about 6-7 inches away from fuselage?

Also, Im wondering if Xicoy is good for smaller planes is it only more appropriate to use with larger ones?
Finally, Should I be expecting the CG points to be almost the same between Xicoy and GP balancer? Maybe my premise to validate the xicoy with a GP balancer is flawed to begin with.