J-3 Performance

[MLenoch]

I may need to ferry a J-3 this week. I need some specs: What's the fuel
capacity, fuel burn rate and cruise settings?
Thx
VL

[zatatime]

On 15 Nov 2004 04:40:44 GMT, (MLenoch) wrote:

>I may need to ferry a J-3 this week. I need some specs: What's the fuel
>capacity, fuel burn rate and cruise settings?
>Thx
>VL

12 gallon tank.

Plan on 5 gph burn (more like 4.5 but be safe if you don't know the
plane)

Cruise between 2150 and 2250.

Plan fuel stops so you're ON THE GROUND every 1:45 until you know what
you've got. Don't go past 2 hours even if you get one that's pretty
fuel efficient.

Enjoy the flight!!!

z

[Cub Driver]

On Mon, 15 Nov 2004 05:24:02 GMT, zatatime > wrote:

>Plan on 5 gph burn (more like 4.5 but be safe if you don't know the
>plane)
>
>Cruise between 2150 and 2250.

I set it at 2100 and expect 4 gph. I fly two-hour segments but of
course that's pretty meaningless on a ferry trip since you probably
can't account for the wind that precisely.

all the best -- Dan Ford
email: (put Cubdriver in subject line)

Warbird's Forum www.warbirdforum.com
Piper Cub Forum www.pipercubforum.com
the blog www.danford.net

[john smith]

What year is it?
Wood or metal prop?
Wood props turn 50-100 rpm faster.
I figure 4 gph, but I agree, don't fly more than two hours without
stopping. (Depending upon the seat cushion material, that may be all you
want to do anyway. Unless you confor foam, that seat is going to get
mighty hard, fast.)
The Cub's fat wing climbs like a homesick angel.
Expect 65-70 mph cruise at 2100 rpm (Does that sound right, Dan?)
Use 60 mph in the pattern, 55 mph down final slowing to 45-50 mph at
roundout.
Depending on your girth, you can either use the toe of your right foot
to pull the carb heat or pull to a slight climb before standing up and
reaching forward while descending as you pull the carb heat by hand.
The door on the Cub is nice because you can hold onto the open lower
portion with your left hand so you don't slip while you stand behind the
prop to flip it to start the engine. You then have the throttle and fuel
close at hand.
I start the engine with the fuel turned off. If the airplane gets away
from you, it will only run for 30 seconds or so until the sump empties.
This gives you time to climb in and move the switch to ON.
The glide ratio is 10 to 1.
Max gross weight is 1220 pounds.
Remember to clear the carburetor every minute or so when/while in a descent.

MLenoch wrote:
> I may need to ferry a J-3 this week. I need some specs: What's the fuel
> capacity, fuel burn rate and cruise settings?
> Thx
> VL

[BTIZ]

two hours is two hours.. regardless of where the wind takes you.. it's still
8 gallons gone out of 12..
even if you are not where you thought you should be for that planned fuel
stop

BT

"Cub Driver" > wrote in message
...
> On Mon, 15 Nov 2004 05:24:02 GMT, zatatime > wrote:
>
>>Plan on 5 gph burn (more like 4.5 but be safe if you don't know the
>>plane)
>>
>>Cruise between 2150 and 2250.
>
> I set it at 2100 and expect 4 gph. I fly two-hour segments but of
> course that's pretty meaningless on a ferry trip since you probably
> can't account for the wind that precisely.
>
> all the best -- Dan Ford
> email: (put Cubdriver in subject line)
>
> Warbird's Forum www.warbirdforum.com
> Piper Cub Forum www.pipercubforum.com
> the blog www.danford.net

[Cub Driver]

Nuh!

If you're flying from NY to LA, you can't simply divide the nation
into two-hour segments, because you can't know from whence and how
fast the wind will be blowing.

Two hours in the air may always be equal, but the miles covered on the
ground are not.


On Mon, 15 Nov 2004 20:09:08 -0800, "BTIZ" >
wrote:

>two hours is two hours.. regardless of where the wind takes you.. it's still
>8 gallons gone out of 12..
>even if you are not where you thought you should be for that planned fuel
>stop
>
>BT
>
>"Cub Driver" > wrote in message
...
>> On Mon, 15 Nov 2004 05:24:02 GMT, zatatime > wrote:
>>
>>>Plan on 5 gph burn (more like 4.5 but be safe if you don't know the
>>>plane)
>>>
>>>Cruise between 2150 and 2250.
>>
>> I set it at 2100 and expect 4 gph. I fly two-hour segments but of
>> course that's pretty meaningless on a ferry trip since you probably
>> can't account for the wind that precisely.
>>
>> all the best -- Dan Ford
>> email: (put Cubdriver in subject line)
>>
>> Warbird's Forum www.warbirdforum.com
>> Piper Cub Forum www.pipercubforum.com
>> the blog www.danford.net
>

all the best -- Dan Ford
email: (put Cubdriver in subject line)

Warbird's Forum www.warbirdforum.com
Piper Cub Forum www.pipercubforum.com
the blog www.danford.net

[Cub Driver]

On Tue, 16 Nov 2004 02:12:06 GMT, john smith > wrote:

>Expect 65-70 mph cruise at 2100 rpm (Does that sound right, Dan?)

I am very modern and use knots. I figure 60. Two knuckles on the chart
is 10 nm = 10 minutes :)

Except that it never works out that way. Yesterday going up to Lake
Winnipesaukee it was 50 knots over the ground northbound, 75 knots
southbound. Yet KPSM was saying winds variable.

all the best -- Dan Ford
email: (put Cubdriver in subject line)

Warbird's Forum www.warbirdforum.com
Piper Cub Forum www.pipercubforum.com
the blog www.danford.net

[Malcolm Teas]

Cub Driver > wrote in message >...
> On Tue, 16 Nov 2004 02:12:06 GMT, john smith > wrote:
>
> >Expect 65-70 mph cruise at 2100 rpm (Does that sound right, Dan?)
>
> I am very modern and use knots. I figure 60. Two knuckles on the chart
> is 10 nm = 10 minutes :)
>
> Except that it never works out that way. Yesterday going up to Lake
> Winnipesaukee it was 50 knots over the ground northbound, 75 knots
> southbound. Yet KPSM was saying winds variable.

<grin> They were variable. Depending on your compass heading...

-Malcolm Teas

[MLenoch]

Thanks to all that submitted info.
I have gotten more J-3 data from you than many instructors would have provided.

Now when I get to the plane, at least I'll have a concept of what to look for.
(I haven't flown a J-3 since college.......don't ask; too many years ago!!)
VL

[Morgans]

"MLenoch" > wrote in message
...
> Thanks to all that submitted info.
> I have gotten more J-3 data from you than many instructors would have
provided.
>
> Now when I get to the plane, at least I'll have a concept of what to look
for.
> (I haven't flown a J-3 since college.......don't ask; too many years
ago!!)
> VL

When they had *just* changed the name to J-3 from J-2, and they were all
brand new from the factory, right? <g>
--
Jim in NC


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