The Fayette Flyersof Georgia |
The Fly Paper |
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Modelers of Fayette County , Georgia. |
| http://members.aol.com/ffly98/fayetteflyers.html | In This Issue: Tommy has your Gate Key. April ahhh Love that Pollen! |
March 2000. If you have access to this on the WEB and are still getting it by U.S. MAIL we need to know, send an email to Eschlumber@aol.com. It saves a bunch of time and money. Down to 24.
The FLY Paper is posted the week [or so] following the Club Meeting.
Upcoming events: see your calendars.
Saturday April 15th will be the Electric Fun Fly from 10am –4pm
with anything and everything powered electric. The April meeting will be held at the field
with our annual Night Fly following the meeting. Bring
something to light up the sky. It’s easier than you think.
Then on May 20th and 21st, the club will host the Electric Sailplane Contest.
PRESIDENT’S CORNER - Tommy Vinci
The time on the calendar says it is time for our annual
pilgrimage to TOLEDO! If you don’t know what I’m referring to, you are evidently
new to the hobby. The yearly trades show in Toledo, Ohio is the best there is for seeing
everything at one place at one time. All of the manufactures are there with their latest
products, kits, engines, and everything else that pertains to the hobby. Bill Divins, Tom
Huckaby, PeeWee, and Ernie Schlumberger and I are headed up; it has become a yearly
tradition. Randy was going but couldn’t swing a "kitchen pass" at the last
minute, used work as an excuse (yea, right)! Full report next month. [Viva La France]
Look forward to seeing a lot of you at the field on April 12th for our electric fun fly. If your giving thoughts to getting an electric powered airplane it would be a great time to see some of the different aircraft types that have now entered the electric field. You will be surprised.
The Prez
Meeting Minutes: March 30, 2000
Officer reports:
President Tommy Vinci brought the meeting to order at 7:30PM with 19 members, 1 guest and 4 member applicants in attendance. Secretary Ernie Schlumberger then gave a status of the membership, which now totals 112 paid members with 98 of them continuing membership from 1999 and 14 new members in 2000. Only 25-30 members do not have email or web access.
Treasurer Dave Zeigler went over the finance report for March. We had $695 in renewal income, $400.80 in expenses, which leaves a total of $10,574.84 in all accounts.
Vice-President Randy Hawkins then went over the process of rolling the runway and re-staking the carpet which was completed on Monday March 13th. We also cut down several small trees around the pond and creek bed, those still need to be hauled off to the swamp. Randy made a suggestion to table the idea of paving the runway for a while and no objections were made.
Tommy then announced he found a members gate key at the field, whoever lost it, should contact him to reclaim it. Tommy then discussed some upcoming events. Saturday April 15th will be the Electric Fun Fly from 10am –4pm with anything and everything powered electric. The April meeting will be held at the field with our annual Night Fly following the meeting. Bring something to light up the sky. It’s easier than you think. Then on May 20th and 21st the club will host the Electric Sailplane Contest. This will be a two day sanctioned event with contestants coming in from several other states. The events will be Class A sailplane, Class B, ½ A, old-timer and the new N.E.A.C. Sailplane limited motor run events. There will be an entrance fee for the events and the participants will be invited to a cookout on Saturday night following the first day of contests. Mike McGowan is the contest director.
Dave Zeigler then told about the Science Olympiad State Championship coming up on
Saturday April 1st. His kids will be defending their 1999 National Championship
with some of Dave’s newly designed rubber powered planes.
Dave also reported that the Perry
Show kid’s area was a complete success with a total of 283 airplanes (rubber powered
& hand launched gliders) built and flown during the day. Ehobbies.com helped
sponsor Dave and they also are going to get set up to carry his line of planes on
their website. Also watch the up coming issues of several RC magazines for articles about
the Kid’s area at the Perry Show.
New Business:
Randy and Tommy talked about some other planned improvements to our field. They mentioned adding 2 more sections to our shed, repairing/replacing the flight line fence, repainting the old white shed and installing "No Taxiing in the Pits!" signs at the field. Tommy also mentioned that the shed is for humans not planes. It’s a safety issue and noise concern. We also may rent the roller again if the ground is soft enough to smooth out some more areas around the runway. It was noted that the road leading to our field was in need of some grading and gravel work. Charles Perkins will be contacted to handle that.
New Members:
This month we added 4 new members bringing our total to 116 now. They are: Bob Hetzler, David Topel, David Ewen, and Antonio Broughton. Please extend a warm welcome and help to get them up and flying.
Show and Tell:
Randy Hawkins showed off a nice frequency channel marker he made for his transmitter using Avery 2" x 4" glossy labels and his color printer using Print Shop software. The marker included a picture of the Plane he flies with that transmitter. David Holec brought in a SIG Somethin’ Extra nicely covered in Century 21 fabric and even included a hand-sculpted pilot figure.
Broken Prop Award:
This month we had no shortage of crash stories, but the winner was Skip Getelman. Skip won for great job of getting the plane out over the field before crashing due to taking off with the aileron servo reversed. He had just finished swapping around a receiver from plane to plane. The plane took off and immediately snapped left and right until he planted it safely away from the pits.
Skip did the exactly proper thing!
Without hesitation. HE dumped the model
.Skip! Thanks for the lesson learned.
Engines 101?
ABC & Ringed Engine Operation - supplied by Bill DivensRinged Engines are quite different from ABC (Aluminum-Brass-Chrome) or A.BN (Aluminum-Brass-Nickel) engines and must be operated differently.
A ringed engine utilizes a ring on the piston to control the exhaust gases during combustion, prohibiting the gases from going past piston to contaminate the incoming fuel and air. An ABC engine controls the exhaust by careful control of piston-cylinder sleeve clearances.
RE: ABC Engine: In the ABC engine, the cylinder sleeve is taper ground, being smaller at the inside diameter at area forming combustion chamber at top - causing tightness at top dead center - this tightness will be felt when engine crankshaft is 'rotated because when engine is cold, there is practically no clearance between piston and sleeve, causing this bind.
When the ABC engine reaches operating temperature, the combustion chamber area is hotter than lower part of sleeve. This heat causes expansion, which is controlled by the design of the Piston and Sleeve, and allows the cylinder to give relatively same clearance above and below. This is the result of being straight bore when heated.
All engines are effected by improper operating temperatures caused by improper fuel management. As you can understand, too high an operating temperature caused by too lean running will effect the expansion of the sleeve, and cause power loss and engine destruction.
To obtain best wearing surface between piston and cylinder walls, an ABC engines sleeve is made of bronze, and internally plated with chrome. The sleeve dissipates heat rapidly with proper lubricant to form less friction between piston and cylinder. (Lack of lubricant and excess heat will quite easily damage engine).
Ringed Engine
A ringed engine does not have the taper, and does not have bronze sleeve coated with chrome. The sleeve is porous, which means that there are tiny holes in the metal that carbon can fill! Carbon is a natural lubricant, so filling in the tiny holes in the sleeve will "glaze" the sleeve, giving excellent lubrication for the piston.
The ring in the piston, when installed, is under considerable spring tension, which, within normal limits will always keep tension on cylinder wall to prevent "blow by" of the combustion gases that may contaminate the incoming fuel and air in the crankcase- resulting in large loss of power.
Because this ring localizes much Fiction (piston has skirt clearance), the matter of reducing metal to metal friction is important. Although piston is "glazed," the ring is not, so a low friction molecule must separate ring from cylinder. This low friction molecule is part of the lubricant in the engine fuel. This means proper fuel is imperative for a Ringed Engine. If improper fuel management occurs, rapid failure of the operating engine parts will result.
If proper fuel management occurs, a ringed engine may last longer than an ABC engine. Additionally, after long term good performance, a properly run ringed engine will in most cases be less expensive to repair, needing only a new ring, instead of a new piston and sleeve.
To allow the ring to work properly, we know that it must be lubricated and allow the heat to be carried away by lubricant remaining in the liquid state (fuel). If the lubricant reaches its Flash point, it will burn and all the positive effects of the lubricant will be gone. As the carbon and varnish levels will be too great in the engine and mechanical wear of the ring and the built-in tension will be gone!
There is only one suggested lubricant used in model engine fuel that has a flash point nearly I 00 degrees Fahrenheit higher than the usual synthetics used, and that lubricant is Castor Oil. A ring engine must have at least a partial part of this total lubricant- Castor Oil.
Lean operation even with a good fuel can destroy all types of engines, and possibly sooner with a ringed engine.
Fuel Management for all Engines: The habit employed by most pilots of adjusting for maximum RPM on the ground with a full tank of fuel will result in a lean run!!. Moreover, possible flame out which is a regular occurrence at the flying field. Employing this method of maximum RPM for ground performance is not correct for the flight environment.
Proper fuel Management for all Engines: RPM increases from 10%-30% in the air over that achievable on the ground. This is due to the forward motion of the airplane as well as the aerodynamics of the propeller. This increased RPM constitutes more air to engine and the carburetor settings on the ground are now improper to the flight performance of the engine.
Additionally, the burning of the fuel in flight will lower the level of fuel in the tank, as will high climb rates, aggravating low fuel flow and lean run!!!
If an engine is to perform over longer periods of time, the engine must be adjusted for flight environment!!! It is imperative to simulate the flight environment while on the ground. One method, which we suggest, is to fill the fuel tank to about 1/3 capacity, and then start engine. With engine running, hold the aircraft nose up in the air, and adjust carburetor to maximum performance. Once top RPM is reached, richen the setting until an audible RPM drop is heard.
This setting should give you excellent flights.
Remember that the needle valves do not require adjustments prior to every flight, which is a common habit that eventually causes engine returns to the service department. You should not have to reset the carburetor until climate temperatures really change or you change your type of fuel. –Thanks Bill
John Anderson’s Pietenpol Aircamper- Electric
Note lack of carb, rings, fuel, castor, glow plug, needle valve and richness setting.
Happy Flying - Randy