Justin_vb

Silly question, the instructions says to measure the distances from the sensors. Is this still correct for offset struts like below and Damo's F-18 as shown above?

philjac94

See FB message

Mark Vandervelden

Hi Justin
It dose not matter how the struts are configured the relevant measurements are from were the load is supported buy the three sensors in relation to the expected CG.

philjac94

+1

FenderBean

I think this a great item for jets, since cg always seems to be a guessing game. Is it possible or will they be any defaults for people that can be selected in the unit? For example on something like the ARF kits all SM 1/6 f16 will have the same measurements and all the SM Bae hawks will have the same measurements. So just make a data base with these and make it were you just select the model and the scale and bam your done! Then over time as new models come out or different scales of a model you just release a new software update or even make it were u can manually enter and store it!

olnico

No, because some models have trailing link struts.
In that case the position of the wheel projected on the fuselage longitudinal axis will change with the weight of the aircraft.
One could say that 1 mm does not really matter, but this is not true in that case since the CG position is given to the mm...

olnico

Yes. Positions must be projected on the fuselage longitudinal axis.

FenderBean

So your saying that all SM f-16 models of the same scale would be different? I would think peoples measurements and eyeing up the ruler would have more error?

Damo260

You really can't stuff it up using a tape measure and plumb bom to get the cg accurately

Damo

Gaspar

We have just begun to ship the pending orders, older first.

Just a small comment for the customers that have this device on order, there is a new option for this device. It consist in 3 pc of electronic angle sensors (resolution 0,1º) to replace the weight sensors. The use of these angle sensors is to accurately measure and setup the throws of control surfaces. Manual can be downloaded here: http://www.xicoy.com/CGMeter1_00.pdf

For those costumers that have ordered the CGMeter and would like to include these sensors, please contact us to or your dealer to modify your order before shipment.

Gaspar

olnico

http://www.ultimate-jets.net/product...-angle-sensors

r 3

Hi Gaspar
Will you be coming to Jet Power in Germany in September and will you have these units with you for purchase.
Bill

Edgar Perez

My Feedback: (13)

So what would the formula / process be if you don't assume that both main wheels are the same distance from the nose?
I guess I could derive it from the forces equilibrium, but if there is a shortcut even better.
Thanks

osvaldopv

My Feedback: (12)

Can someone explain how do I get the distance between the mains and the CG, this is the step (2) from the instructions. I have an Avanti S and the recomended CG is 250mm. From were to were do I have to take the measure to put in the CG meter?

Thanks
Osvaldo

spike5150

CG is usually referenced from leading edge wing root or some other reference point (not sure about your specific plane). So mark CG from that spot, then measure the distance from the mains to that CG mark and input that to CG meter. And if its not obvious, you need to measure distance from a spot that is perpendicular to an imaginary line between the two mains to the CG location (and the nose wheel, for that matter).

philjac94

Easiest way is to use a plumb-bob or weighted pointer on a string and mark leading edge location on the floor and measure from there.

vquick

My Feedback: (71)

I build this yesterday i will be using a plumb to align the plane cg to the wood and have the measure on the side to the center of the sensor I have a mark in the wood for my 0 point cg

spike5150

Very nice vquick. I like it.

EDFJim

My Feedback: (2)

OK for a beer is a great price to play with this 😀

FenderBean

I will have mine at KY jets and if anyone would like to give it a whirl fill free to hit me up, no fee required but like I will never turn down a good old blue moon or shock top!

Got this thing for my F-14 and future builds, the F-14 is hard to do as are any of these larger jets.

drifter

My Feedback: (53)

Wouldn't the difference in weight on the main wheels indicate if there were a lateral balance problem?

spike5150

Such a nice unit I thought it needed its own special case. Pelican model 1170.

Zeeb

My Feedback: (41)

That's just the ticket for the balancer stuff. Thanks for the pic and including the case model number as there are not any Pelican dealers around here who seemed to have it, a few pistol cases but they were a lot more money than the 1170 I ordered online....

mort78

My Feedback: (1)

Yeah, thanks Spike. That's such an awesome case for it..... I had to order one for myself

FenderBean

I was super surprised to get my unit today, when I ordered it three days ago it was listed as back ordered!!!! Can't wait to use it on my f-14!