Weight and balance CG,center of gravity, is a sum of the moments[arm x weight]of each piece divided by the sum of the weight of each piece measured from a common datum point.The arm being measured from a common datum point.This is how I computed radio changes in aircraft.Measure the component distance from the datum,multiply that with the weight of the component.This becomes the moment for the component.Add the moments to all components and divide the sum of the weights of all components=CG.Aft of the datum is positive and forward of the datum is negative.The datum point can be any point the designer wants.I believe Ken used the aft face of the main spar.Any thing I say may be wrong.Works for me.Tommy W. On Tue, Jan 20, 2015 at 9:30 AM, jon kimmel via KRnet <krnet at list.krnet.org> wrote:
> Weight and balance is simply a summation of weights and moments. If you > know the weight and centroid of the wings then you can certainly do a good > calculation without them. On the e-3 they often do the final weighing > without seats, paint, and other things. Those are added back later. > > https://sites.google.com/site/mykr2stretch/ > https://sites.google.com/site/mykr2stretch/parts-for-sale > On Jan 20, 2015 9:24 AM, "stefkr2--- via KRnet" <krnet at list.krnet.org> > wrote: > > > Kr friends, > > I have maybey a stupid question. > > We are almost at the point that we will start with the engine mount. So I > > have heard that there is a possability to calculate the distance. So > this I > > will all understand. I want to do 1 weight And ballance sesion (2 pax, 1 > > pax, full fuel, low fuel). > > I want to do an exstra weight sesion without Wings. This all outside. Is > > there a possiblity to calculate all the data so I can do a w&b without > > wings so we can do this inside, to check that the engine mount is oke. Or > > do you all say, this is not possible And you need for a good check in all > > times the wings. > > Greets and thank you > > Stef > > > > -- > > Steph and his dad are building the KR-2S see > > http://www.masttotaalconcept.nl/kr2 > > > > > > > > > > _______________________________________________ > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > > please see other KRnet info at http://www.krnet.org/info.html > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change > > options > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
