chevy43

I'm sort of new to 1/2 a

The other day I pulled my Airtronics Q Tee kit from under my dad's house that I bought in '77 and never finished. It probably was a bit dificult for an 11 you without help I plan to finish that now.

Meanwhile I ordered this: [link=http://www.hobby-lobby.com/pt19.htm]PT-19[/link] . A Cox PT 19 was my first control line plane and I have always liked them ever since.

I just couldn't spend $200 on electrics though so I bought a PAW .061 diesel. It looks like it will work fine.

I don't feel like spending a bunch of money to save 2 oz etiher so I'm planing on using a regualr futaba reciever and battery I already have.

The plane weighs about 12 OZ near as I can tell using a cheap postal scale.
Engine and prop about 3 OZ
Tank with fuel aprox 3 OZ
radio and batteries about 6 OZ

I'm looking at 24 - 25 OZ which is on the higher side of what the kit recomends max about 25 to 26 OZ.
That would be about 16 OZ per sq foot.

I'm not familiar with wing loading yet.

How does this sound? High or really High?

skaliwag

My Feedback: (1)

Hey Chevy... We are neighbors... mail or PM me.

chevy43

Well,

I did some searching and found this nice cauculator:

[link=http://adamone.rchomepage.com/calc_cubicload.htm]Wing load calc.[/link]

13.31 per square foot. That is pretty high so I might have to get it on a diet.

I wish I had some idea of how much battery I need for how long... Any help here would be apreciated.

I guess I could cut an once by buying a new RX - that will be an expesive OZ!

mylamo

My Feedback: (1)

You can cut some weight in the fuel tank. the .06 will run
about 12 minutes at full throttle on 1 oz. If you want to
cut some in the battery you could go with nimh and
probably lose another 1 or 2 oz.

rainedave

My Feedback: (1)

The Hobby Lobby site lists 225 sq." of wing area. 225 divided by 144 is 1.5625. 25oz divided by 1.5625 gives a 16oz wing loading.

With this plane every ounce equals .64oz of wing loading. So, 24oz will give you a wing loading of 15.36oz; 26oz gives a 16.64oz loading, and so on. Losing three ounces would lower the wing loading by 1.92 or almost two ounces.

I agree about the cost of e-power. Especially if you go with a brushless motor and Li-Po batteries. Anyway, I don't thing 16oz is a terribly high wing loading for a 38" span low wing model. But, it will need to fly faster than a typical park flyer to stay in the air. I would think you'd need a wing loading of 12oz or less for really slow flight (18.75 all up weight).

chevy43

Well I gues it will be a fast flyer.... After all it was built origianally to train pilots for high wing load fighter planes.

I might see if I can loose a couple of OZs. but if it gets really expensive I'm not going to worry about it. After all I can buy another plane insted of spending lots of money on every last gram.

Remby

My Feedback: (3)

Your flight weight sounds on the high end, but should work fine. The engine you are going with is unknown as far as power to me, but the weight you give would fly with a .049 Tee Dee, so will probably do even better with your choice.

It won't do 3D, but should be fine otherwise.

Tim Wiltse-RCU

chevy,

Keep in mind that diesels are alittle better on fule than a glow engine. With that said a PAW .061 should run for ever on 1oz of fuel. Take a look at other tanks or make a Fuji film tank.

LAter,
Tim