The International Cessna^® 170 Association

Does anyone know where I can find a loading graph for a 1948 C-170

Thanks,
Tom

I think there is one in the TCDS

Tom

There is one in the TCDS and there should be one in the Owners Manual for your aircraft. Note the Owners Manual is not the single page Aircraft Flight Manual which must be in your aircraft to make it airworthy.

If you are just trying to do a W&B for a particular load and not actually create a new W&B for the whole aircraft I have created a W&B calculator with graph in excel I will send you. In any case make sure what ever you use is for a '48 as it is different than all the rest of the 170 models.

Now if you are looking for information about where something is located on the aircraft (the arm) such as the engine or battery box or spinner then that information can most times be taken from the equipment list at the end of the TCDS.

For example if you are replacing your pancake style mufflers you would subtract the actual weight of the old system at an arm of -22 and add the weight of the Hanlon-Wilson exhaust manifolds and carburetor air heater. You could use the actual weight of the new system but it should be 15 lb. and the arm is -22 according to item 110 of the TCDS

If you can't find what your looking for in the equipment list or just not sure if it's right you can measure from the front of the fire wall face (the datum per TCDS) to what ever point you are looking for and you will have the arm.

N9149A wrote:There is one in the TCDS and there should be one in the Owners Manual for your aircraft. Note the Owners Manual is not the single page Aircraft Flight Manual which must be in your aircraft to make it airworthy.

Be careful about the owner's manual for a '48 C170. The copy on the TIC170A web site (http://cessna170.org/phpBB2/membersOnly ... 170_OM.pdf) does not have any graphs for loading; even worse, the CG limits it gives are not correct (they don't mention the upper left corner cutoff, i.e. maximum forward C.G. moving aft between 1733 and 2200 pounds. You must go by what's in the TCDS (http://cessna170.org/phpBB2/membersOnly ... _Rev54.pdf) or your AFM, not the owner's manual.

Best Regards,

John

John is correct as I just reviewed the Owners Manual. The numbers given in the Owners Manual are correct but insufficient information to do a weight and balance as they leave out other limitations. I'm not sure the info given there was intended to be the sole information used to do a weight and balance.

I can attest as I was the one who scanned that original that nothing is missing from the PDF at the association site except a page which is noted. I don't think John was implying that.

Another point that you must be a member of the TIC170A in order to view the links John gave.

Tom,

If you use a PDA of some kind that uses the Palm OS, CoPilot is a really good solution for all flight planning calculations, including W&B. It's here: http://lauriedavis9.tripod.com/copilot/ for a $20 donation. Once you've entered and saved all the data for your aircraft, including the info from its W&B sheet, it will compute W&B for any loading you specify. It'll plan your whole flight, actually, and give you flight plan data that you can read off directly to FSS. (It uses a customized airport database that you download free from another site.) One of the nicest pieces of software that I've ever used, for any purpose.

Best Regards,

John