Daily Archives: May 22, 2015

4 posts

Brads’ Corner for May/June 2015

Brad Quan UranaHello again aircraft lovers!!
As we approach the end of May we have seen a couple of May showers that bring a few things to mind. With the recent rain the vegetation in the surrounding field will see a growth spurt over the next couple of weeks. For us, this means an increased amount of flammable material – so your continued vigilance at the site is greatly appreciated.
Yes, I know we love to fly our devices. And yes, I understand how much we dislike missing a day due to mother nature.
PLEASE do us a favor and let the field dry out for at least 12 hours following any rain of consequence. The whole site drains fairly quick, but if there are puddles in the parking area, the field is still soft.  I have heard comments that “My plane is light” or “My wing doesn’t have tires to dent the field”…
Trust me, it isn’t the light planes or the wings I am worried about. It is the 3 – 5 inch deep footprints of somebody walking out recovering their light airplane or wing. These craters potentially stay for months once they are there and affect everybody. Jim came to our rescue this week by renting a roller to flatten out the field and smooth out the footprints. This was a $375.00 fix that could have been avoided with some free common sense.

 

We had a successful barter day this month, with ” barterers” from other clubs joining ours for some good deals. The next local event will be the Father’s day swap meet at Discount Hobbies on 21 June. Those who came to barter between 7:00 and 9:30 made out before the steady drizzle set in until nearly noon. As a result, people packed up and the electroglide was postponed to the 23rd. For those who missed it, DJI was at our field in the afternoon in conjunction with Drones Made Easy and conducted the flying portion of the “DJI Experience” which is intended to educate new pilots and curious parties in the safe operation and current guidelines of multirotor flight.  Jim was ” supposed ” to listen in on the presentation, and make comments on specifics about our field, but I heard he actually took over and gave instruction himself. Don’t forget- He is the QUADFATHER!!

 

There has been some interest expressed lately in doing wing combat and/or in flight ribbon cutting events. While this can be a lot of fun for both participants and observers, it – by its very nature – increases the risk of mid-air accidents. Jim and I were approached about using club funds for purchasing and maintaining possibly disposable airplanes to support these endeavors. We both felt that this is not a proper use of our money. However, just like the wing racing and F5B/D events, if a group of you, that understands the possible effect on your personal planes, want to form an event plan and present it to the board for consideration and possible addition to the calendar, please contact Eric S., Ian M., or Ken D.

 

I also need to comment on something that has been occurring more often over the last nine months or so.
I feel Paul is a great treasurer and I really appreciate how he attempts to keep track of club money and ensures we are justified in making the right purchases at the right time for the right price. He will argue over a dollar and that is exactly what I expect out of a treasurer that is handling our (your) club money. He is a perfectionist. I require Paul to keep and be ready to present receipts for everything he spends as well as receipts from people he reimburses for making a purchase on the club’s behalf. I don’t get paid for the food Items I buy for meeting days without a receipt – Jim does not get paid for the contest prizes he purchases without a receipt or renting equipment to roll out the field.  Should be easy??? Recently seven out of the last 10  people (not counting board members)  people requesting reimbursement cannot understand that I require Paul to get receipts and they either call him asking for money, e-mail him without attaching a receipt, or send him a picture of a number written on a napkin?.
When Paul asks them for an actual receipt they either get childish, indignant, or downright nasty with their responses. This needs to stop – Today.  If you are helping the club by providing a service, or purchasing items to help support events – we REALLY APPRECIATE YOU!. But please understand the requirement to get a receipt to keep track of the money. NO ONE is doubting your integrity or calling you a liar. Yes, we believe you. But that does not clear us to pay without a receipt. As a responsible board we must be ready to open our books and show anybody who asks where the club money is being spent.

 

Enough of that – lets finish on a high note!
We have started kicking around initial plans and suggestions for the year-end holiday banquet. We are setting up a committee comprised of 2 board members along with 4-5 club members that have expressed their desire to become more involved with the club. We should have the committee firmed up by mid-June. If you have a suggestion for a venue that is centrally located in the county feel free to share your thoughts.

 

Come join us on the 23rd! Normally we start our monthly fun fly at 10:00, but will kick of 30 minutes early to get in this month’s make up electroglide event. Following that we will launch right to the FPV spotlight (planes and Multi’s) with some exciting games, prizes, and demonstrations. Around noon we will serve lunch, hold the monthly meeting, and then open the field for general flying.

Brad

FPV Spotlight

FPV Spotlight
5/23/2015
10:00 am
FPV (First person view)
Come on down and check out the FPV action!
Races, Games, prizes & more!
Fixed wing AND multi-Rotor
Club meeting to follow
There will be a multitude of systems showing how FPV works and how this exciting part of our hobby is growing fast!

BOD Meeting Minutes for May 2015

By Quan Nguyen

 

Meeting commenced: 7:00pm

Present: Jim, Brad, Paul, Quan, George, Dennis
Absent: Tim, Scott, Bob

Old Business:
-Spanky’s Porta-Potty is falling apart. Do we allow them to replace it? We’ll have to spend $24 to repaint the camouflage schema.
-Give more keys to Spanky’s. Hopefully it will resolve their access problem.
-Setting precedent that board members offering to sell merchandise to club should be offered at competitive market price or lower.
-This month’s event is FPV Day on 5/23. Prizes will be four $25 gift certificates from Discount Hobbies.

New Business:
-Members asking why tables are numbered.
-Reiterated that all expenses must be approved by board, and legible receipts submitted to treasurer, to get reimbursed. Treasurer will reimburse contracted party directly; payments shall not be made to intermediate parties.
-Suggested forming Holiday Party Committee to organize holiday party starting in June. Committee will be given a budget, and will organize venue and food. Need to determine how committee is formed. There will possibly be two board members in the committee.
-July 4th party planning. Will continue to lock gate during the event. Club will provide (non-alcoholic) drinks and grill. Members will provide food. Discuss providing lawn games. Selling $1 raffle tickets. Board approving $250 in raffle prizes. This will be a club member and family only event.
-Thanks to Drones Made Easy for contributing to DJI Event on 5/16.
-Discussed club instructor policy. All members are eligible to be club trainers.
-Board has determined auditing of the contact list is overdue.
-Approved motion to spend $350 one time to send Isabel Guidice to take a Microsoft Access class to build & maintain club membership software/database. Investigated “canned software”, and none fits the club’s needs and budget.
-Treasurer’s Report: All is good. Refunded a few members due to Alliant no longer being offered at SEFSD.
-Next meeting on 6/12 at Paul’s place.

-Adjourned at 8:50pm

Stick Patter by John Forester

 

Angle of Attack

 

Every wing has a slope toward the wind at which it produces no Lift. That is called the Zero

Angle of Attack (AOA). Since a plane has weight, it can fly only by using a positive AOA to generate Lift.

 

Lift and Drag

 

Remember this well. You can’t get Lift with- out producing Drag. That’s a law of science. To get more Lift by increasing the angle of attack, you have to either slow down or use more power.

 

Circles

 

Just like a bicycle on a curve, a plane has to bank into a turn. To make a gentle circle to the right, move the stick gently Right until the plane has achieved a small banking angle, less than 10 degrees. At this moment the plane will enter a right circle. Lift, being perpendicular to the wing, will be pulling the plane towards the center of the circle, and the drag of the tail will be causing the plane’s body to turn around following the circle.

If you were to continue this for a full circle, you would see that the plane had lost altitude. To circle while maintaining altitude, you need more Lift, which means Pull, a little bit, on the right stick. For many primary planes, you Pull the stick about 1/4 of the distance you moved it Right (or Left, for a left circle).

 

Lazy Eights

 

This is a useful exercise for any student. Make a full circle, say right, followed by a full circle in the opposite direction, left. Each circle must maintain altitude, and be without bounce or drop as you switch from one circle to the opposite cir- cle. This trains your coordination of Right or Left with Pull and then Push, so the plane moves smoothly.

 

Stalling

 

Until now, you have been making gentle movements, climbing or turning, relying on the safety reserve of speed and power that you have when flying at cruising speed. If you needed much more lift, you might Pull much more, thus increas- ing the AOA to get more Lift. That’s fine for a bit, but when the wing gets to an AOA of about 18 degrees to its movement through the air, the air flow around it just tumbles into turbulence and Lift disappears. Then there’s no Lift to hold the plane up, and it falls. This is called Stalling. Unpleasant at any time, and very dangerous when near the ground.

While stalling is affected by load carried and speed of flight, the only thing that causes stalling is pointing the wing to too far up, which is done by Pulling the stick excessively when trying to get more Lift.

Remember this well. The way to end a stall is to Push the stick somewhat forward. That decreases the AOA until the wing gets a grip again on the air and the plane becomes controlla- ble.

 

More Vigorous Movements

 

You are now ready to make more vigorous turns, turns with smaller radius. That means more bank angle (stick more to the side) and more Pull. Since Pull increases Lift, and increased Lift increases Drag, you need more Power to counter that increased Drag.

You need more Lift for two reasons. With increased Bank, Lift is no longer pointing away from Weight, gravity, so it has to be stronger to keep the plane in the air. To turn the plane quicker and sharper requires still more Lift to pull it around quicker. When the plane is banked 45 degrees in a turn you need about twice as much power as for slowest level flight.

Therefore, before beginning practice in vigor- ous turns, increase Power, so you have excess Power available during the critical parts of the turn. Then practice Lazy Eights at higher and higher angles of bank until the plane feels uncer- tain. This depends on the Power you have avail- able, and the general design of the plane.

aerobatic and fighter planes can stand higher angles of bank than can general aviation and trainer planes.

If you get into a stall, with the plane getting uncontrollable and falling, then Push somewhat, reducing the AOA, until the wings get a new grip on the air and the plane becomes controllable. You are likely then to have the nose down with still a lot of bank. First level the wings by sideways movement of the stick, then Pull until the plane is level again.

 

Loops

 

If your plane has sufficient Power to make loops, here’s how you do it. Start level flight with wings level. Go to full Power. Wait for speed to increase. Then Pull. The plane will make a loop. When it comes back to level, center the stick to level out and return to cruise Power. You should recognize that all around the loop, Lift is pulling the plane toward the center of the loop, just as in a turn it pulls the plane toward the center of the turn.

 

Turns at Low Speed and Altitude

 

Landing approaches are the most dangerous part of flying. You are flying slowly, using little Power or just gliding in. On the typical circuit you must make two 90 degree turns: Downwind leg to base leg, base leg to landing strip. Flying slowly you have very little reserve Speed or Power. That means that these turns must be made gently. If a turn is made too sharply, with little reserve speed or power, the plane will stall, and you don’t have sufficient height above the ground to recover.

On landing approach turns, limit banking and Pull to gentle levels because of the danger of stall- ing the plane at low speed and altitude.