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-   -   Weight and balance numbers (http://www.vansairforce.com/community/showthread.php?t=63708)

hydroguy2 10-13-2010 09:40 PM

Weight and balance numbers
 
I was looking for a weight and balance data bank, but since Sharpie's website is gone so is the info. (well i couldn't find it anyway) So, maybe we could have a sticky for folks to post their weight and balance data...make sure you give some background for comparison

I'll start:

IO-360, WW200RV C/S prop, prop spacer, extended James cowl, Tip-up, oversized 380-150/5 tires. Simple glass panel, CAD sportsman seats and carpet, painted and full fairings.

right main 511#
left main 514#
tail 70#
total 1095# c.g=80.2



rhunt 10-14-2010 08:10 AM

n213rh
 
Right wheel 525
left wheel 527
tail wheel 77

Total 1129

cg 80.78

Io 360 180 hp hartzelle constant speed, dual skyview, garmin 430w 327, gma 240, anywhere map duo, paint fairings, extinguisher, classic aero interior

cjensen 10-14-2010 09:40 AM

RV-7, O-360, three blade Catto
 
Right main 480
Left main 492
Tail 74

Total 1,046

Empty cg is 81.59"

No paint, all fairings, full interior, SJ cowl & plenum.

What-Now-Ski 10-20-2010 03:08 PM

RV-7, IO-360, 2 Blade Catto
 
Total: 1,005

Dual Dynons, dual battery backup, not much else. No interior except seats and no paint.

Jamie Aust 07-03-2011 03:56 PM

RV-7A
 
Here is mine.
1075.8

Slider closed, catto 3 blade with saber spacer, carb 0360, paint and pants, classic aero seats and carpet.( no side panels yet ) with engine oil, no fuel.

[IMG]

I do have a problem. When I get on the step to get in , the tail goes down. Lucky someone was at the prop and got a hold of it for me. I understand that when I put some fuel in, that it will help. Im going to have to look at how to fix this.

Guenthfa 07-03-2011 06:37 PM

Weight and Balance numbers
 
Left Main 508
Right Main 502
TW 70
Gross 1080
CG 80.92"

O-360 Hartzell CS prop, day/night VFR panel fancy interior (sorry I can't remember)

First flight in the next few days :-)))))

Jamie Aust 08-11-2011 05:19 PM

I still have an AFT CofG, even with 3/4 full of fuel. im at 81.7" Arm

What are my options to put more weight up front ? Im after best bang for buck, I dont want to have to go to CS prop. I think I can get a Landol CG ring for around $450, I already have a heavy starter.

How about some lead bolted to the engine ?

:confused:

David-aviator 08-11-2011 08:08 PM

Quote:

Originally Posted by Jamie Aust (Post 566705)
I still have an AFT CofG, even with 3/4 full of fuel. im at 81.7" Arm

What are my options to put more weight up front ? Im after best bang for buck, I dont want to have to go to CS prop. I think I can get a Landol CG ring for around $450, I already have a heavy starter.

How about some lead bolted to the engine ?

:confused:

Jamie,

The aft limit of the RV-7A is 86.82".

If I put 30 gallons of fuel in the tanks with nothing else loaded, the CG is at 80.74. Yours is at 81.7, about an inch aft of mine.

My weights came in at 417, 412, and 244 up front. What are your weights?

I am somewhat restricted in carrying baggage with more than 400# in the seats plus the CG moves aft as fuel is burned off. Its easy to take off in limit and land out of limit.

You will be restricted also but you should be able to fly the test flights while you come up with a way to add some weight up front. With 30 gallons of fuel and a 200# pilot, I calculate your cg will be at 84.04 well forward of the 86.82 limit. Landing with 10 gallons of fuel, the cg will be at 84.31.

Jamie Aust 08-11-2011 08:45 PM

port = 419 lbs
stbd = 416 lbs
nose = 240 lbs

The problem I have is this. 1 x (about 250 lbs) co-pilot seated, 3/4 full fuel, slider canopy open, when the other pilot ( about 200 lbs ) got on the step and tried to get onto the wing, the tail hit the ground. :(

Note this was with the engine cowls top and bottom off, no wheel pants. Even when I did have them on, it still feels AFT CofG.

LarryT 08-12-2011 12:12 AM

320 engine mount with 360...
 
...and light prop will move the CG forward. Probably not what you wanted to hear since your AC is beautifully painted, but it confirms what I needed to hear.

The 360 engine mount seems to have been designed for a C/S prop. For those of us who like the idea of a Catto prop, we should be using the 320 mount even with the 360.
there is very little difference in weight between a 320 and 360.

LarryT


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