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Re: scales for weight and balance work
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Gary Lee
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Oct 18, 2009 17:59 PDT
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Greetings listers,
I know little about aircraft building practices , am mostly inexperienced as an aviator, but, being a bit of a pack rat collector I have in my posession a copy of a safety bulletin/ advisory circular sent to me from the folks at South Webster Ohio, stamped by the USPS on the 3rd of Nov 1983, addressing, among other issues the center of gravity location for the plane I was building at that time, the 101. For the sake of history and general interest in the topic, thought I'd post the following. Of course, this information will not apply directly to current projects, however.....
From the bulletin, I quote:
1. Center of Gravity Location.
The CG. point on your FP-101 is the rear landing gear attach fitting. The center of gravity is determined by balancing the aircraft at this point with the fuel tank empty and the pilot on board and all other equipment used in flight installed. The aircraft should balance fore and aft on this point with the pilot sitting upright in the flight position with his feet on the rudder pedals. If the pilot pulls his legs up and leans back, the aircraft should become tail heavy, and if he extends his legs and leans forward, the aircraft should become nose heavy. Use weights, if necessary ( the battery is a perfect weight if electric start is installed) to obtain this condition. Following this proceedure will insure that the aircraft will have a slight nose heavy condition when the fuel tank is filled. Do not attempt to fly a tail heavy aircraft!! This condition is dangerous because it greatly increases the stall speed and reduces the top speed of the aircraft.
An extreme nose heavy condition can result in a tendancy to spiral dive and poor control response or loss of control.
Anyway, thought some might find the message enjoyable.
Cheers,
Gary
one wing and all the rest to go.
________________________________
From: Geoffrey & Paula West <harm-@sbcglobal.net>
To: Fish-@topica.com
Sent: Sunday, October 18, 2009 1:44:22 PM
Subject: Re: FFP scales for weight and balance work
I guess what the real "crux" of the entire scale argument would be it ...go ahead and use whatever set of scales you want. It would help GREATLY if ...
1- They were consitant
2- They were acurate
So, experiment away. Geoff 426NH
--- On Sat, 10/17/09, Airplane Girl <agflie-@yahoo.com> wrote:
| | From: Airplane Girl <agflie-@yahoo.com>
Subject: Re: FFP scales for weight and balance work
To: Fish-@topica.com
Date: Saturday, October 17, 2009, 6:52 AM
Hey..................
Back to weighing in (tongue-in-cheek:-)).................................... on the lighter side of things.........
I asked the "Flying Farmer" about all this W & B business and he says, "Heck, if you're building an experimental aircraft use experimental scales!" (just kidding folks) LOL
Staying "blond" in VA.
..... lurking and learning.......... from the best........... (it has been great to see/hear the banter and to hear from all sides)
For some, a goal becomes a dream and a dream makes life worth living.
"There is more to life than being a passenger."From Movie Trailer, Amelia
LMS
KG4WJI
Celebrity Biplane Builder
Aeronca Champ Pilot, N83436
www.bluebirdaerodrome.com
--- On Sat, 10/17/09, Robert E Cook <twocool-@juno.com> wrote:
| | From: Robert E Cook <twocool-@juno.com>
Subject: Re: FFP scales for weight and balance work
To: Fish-@topica.com
Cc: Fish-@topica.com
Date: Saturday, October 17, 2009, 9:20 AM
Joe,
I hope you don't mind changing the subject to a new discussion (argument)........(Complete with sarcasm) lol....
I'm going to start out with a couple of questions........
On your "moth"..............
What is V ne ?
What is Va ?
What is the wing loading ?
What is your entry speed for a loop?
What is the exit speed?
What is the entry speed for an Immelman?
What is the exit speed?
Cookie
Stalls, spins, loops, hammerheads, wing overs, and immelmans are easy.
| | | | Best of luck to you.
Joe Hutton,
Tiger moth TM-28, 300 hours
PS My 95% P-51D is taking shape and coming along great!!!!
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