If you have trouble viewing this email click here.

 November 2007

 In This Issue...


 · Duralite Manganese

 · Package Deals

 · Tech Tips
    ·Explaining the Circuit
    ·Fast Charging

 · Featured Pilot

     ·David Harkey

 · Dealer Profile

   · Chief Aircraft

 · David Sullivan

    ·  Tail Wheel Modification


Welcome to the "In Flight" newsletter from Duralite Flight Systems. Each month the newsletter will be published with the goal to keep you informed as to what is happening at Duralite along with helpful tips, contributor columns.

Power Box Royal Update 

By the time you have received this newsletter, the Power Box Royal will be in stock and the first orders on their way to the first lucky customers in North America. Team Pilot Ray Gholamipour (Reza) introduced the Royal on the Flying Giants website and has been the leader responsible for writing the english instructions for the Royal.

We are also pleased to announce that the price for the complete Power Box Royal including the RRS display and programmer has been reduced to $ 649.95 USD


 
For More Details:www.duralitebatteries.com/flight/accessories1.php

Duralite Lithium Manganese Packs

Duralite has always been the leader in providing the safest power source for the R/C hobby. Because of this philosophy the new line of Lithium Manganese packs are the next perfect evolution in battery technology for the R/C user.

Duralite now builds packs from 1500 mah, 2200 mah and 3800 mah cells meaning we can build custom pack configurations to not only suit the R/C industry but also for commercial applications as well. Because of the chemical composition of Lithium Manganese cells, they are non flammable and simply will not catch on fire if they are overcharged, shorted or punctured. These safety features along with high discharge capabilities of 20C continuous with bursts of 40C are the next logical step in powering R/C aircraft.

As with all Duralite battery packs, the Lithium Manganese packs have the Stay Balance Charge Safe circuit and can be charged with the Duralite Plus line of chargers. The circuit monitors the cells 24/7 meaning that the pack will always be in the best possible balanced condition when you are ready to use it. This means no external balancer is required to condition the cells.

Another advantage of the Lithium Manganese packs it that they can be charged up to 10C of the pack rating which means fast charging is not an issue although the lifespan of the pack decreases the faster you charge it. Many of you reading this are probably thinking how is this possible through the Duralite charge lead and circuit when our recommendation is not to exceed a 1 amp charge rate. It's quite simple as there is no safety diode on the power output lead which has prevented by--passing the safety circuit in the past. Now you can safely charge your Duralite Lithium Manganese packs through the power output leads with other brands of Lithium chargers much like your would charge FlightPower Lithium Polymer packs. Also, the Cycle life on Li-MN is THREE TIMES that of an ion or polymer when charged at 1c or less..

 
For further details, visit http://duralitebatteries.com/flight/batteries-mg.ph p 

NEW!!! Duralite Package Deals

Because of the overwhelming response to our Switch and Save package we have now expanded the program and savings to a number of new packages for IMAC, Helicopter and Jets!  

 

For further details, visit http://www.duraliteflightsystems.com/packages.php

Tech Tips - Stay Balance Circuit 101

One of the hallmarks of the Duralite product line has been the ability to build packs with an internal Stay Balance Charge Safe circuit. This circuit in layman's terms does two functions. (1) It monitors and balances the cells 24/7 to ensure the pack is properly balanced when ready for use. It also corrects an unbalanced condition during the charge cycle. (2) During the charge cycle the circuit monitors the cell voltage and will terminate the charging process of the Duralite charger when the pack reaches it cut off value of the Duralite charger.

Although the Duralite chargers are preset at a rate of 400 ma, the balancing circuit can be charged at a rate of up to 1 amp. This means that for those of you who need to complete a faster charge cycle, you can use a programmable lithium charger other than a Duralite charger. When using a non Duralite charger make sure that the settings are as follows. For 7.4 volt RX packs the cell count is always 2 regardless of the number of physical cells in the pack and for our TX packs the cell count is always 3. The charge rate is not to exceed 1 amp to prevent damage to the balancing circuit. In the event the pack is charged at an excessive charge rate other than 1 amp and the circuit becomes inoperative, it can be replaced at a minimal repair cost of around $10.00. 

Got a Tech Tip? Email you suggestion to: support@duraliteflightsystems.com

Featured Pilot - David Harkey

Hello everyone! I have been flying heli's since 1991 and a Duralite Team Pilot since 1998. Some of my accomplishments include:

Class II AMA National Champion 1996
F3C Team Manager 1999 and Team Mechanic in 2001
F3C World Championship Judge 2005  Zamora Spain
 
The technology for batteries has come along way since 1998. It started with the Lithium Metal cells back then and now we have progressed to the Lithium Ion/ Manganese/ Polymer technology.
 
I have been using the Gemini system on my Miniature Aircraft USA Stratus 90 for the last year and it gives me peace of mind from having a power failure due to the regulator or batteries.
 
Thanks to all the people at Duralite for the products and customer service they provide.
Dealer Profile - Chief Aircraft 
 

Chief Aircraft Inc. is located on the Grants Pass airport in southern Oregon and enjoys having its customers able to drive in for counter sales Monday through Friday. Chief Aircraft Inc has grown into one of the nations largest privately held distribution outlets for Radio Controlled Aircraft models and accessories. Dana and his team pride themselves in being able to offer fast service, low prices, large inventory and a sales staff with a 50 years combined knowledge.

Chief Aircraft Inc. employs over 30 people in its three divisions which of course also include Chief Avionics the extremely successful full scale aircraft parts distribution and mail department. Dana, who at the of age 17 earned his private pilots certificate, is an active aircraft owner (2001 Mooney Bravo and 2004 Super Decathlon),current holder of commercial and instrument privileges as well as airframe and power plant and is the principal avionics inspector for Chief Avionics FAA repair station. Dana and his wife Vicki have been married for over 26 years and have two grown children. Dana enjoys flying his full scale airplanes as well as the larger 35-40% gas models as time allows.

For more information, visit www.chiefaircraft.com

Tail Wheel Modification - by Dave Sullivan
As a full time builder I am always searching for a better mousetrap and if I am having trouble with an industry standard I try different things to solve a problem. Several years ago I owned a 40% plane that had the (Industry Standard) springs to guide the tail wheel tiller to steer the plane on the ground, I could never trust them and I had my plane go into a flight station while on a taxi. I decided to try a few different methods of guiding the tail wheel tiller so that: #1 It wouldn't overload the servo and #2 would not bind the rudder and most of all #3 would be stout enough to always keep the tail wheel working together with the rudder. This is what I have been using for a long time now and install on all of my customers airplanes....
 
Start off with lengths of silicone fuel tubing (large) about 1.5 in long. You will also need (6) small plastic wire ties.Install the butt end of the wire ties into the tubing about 3/8 in and wrap a tie around it so it can't pull out and snip off the excess, do this on both ends of both pieces. Install one side of the male end thru the tiller on the rudder and the other end thru the tiller on the tail wheel. Use the last 4 ties as nuts to keep them from pulling thru the holes. I tape the rudder straight on the plane and adjust both sides to a slightly taught setting when the weight of the plane is on the tail wheel . And "Presto"!  The silicone tubing will stretch when full deflection is reached.
  
This will give you a reliable taxi on the ground that you can trust, The tubing also comes in many different colors so you can actually match these to your plane. I suggest changing these once a year, I carry a little tubing and some wire ties in my flight box. I can't tell you how many guys I have converted over at the field. I hope you enjoyed this tip and it helps to make your ground experiences a little safer.
 
Dave Sullivan





VISIT OUR WEBSITE           Unsubscribe  





Powered by PHPlist2.10.5, © tincan ltd