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Advance Lever
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Flying a helicopter with a cyclic trim is very simple provided a person understands the system and follows a couple of basic principles. One of the most basic forms of a cyclic trim system is simply two electrically driven motors that are activated by a switch located on the grip of the cyclic pitch lever. This switch is commonly known as a "Chinese hat" and is designed to be manipulated by the pilot's thumb. The Chinese hat can only move forward, aft, left and right so in other words no diagonal movement is possible. The switch is self centering and a very important aspect to remember is to never activate the switch whilst the cyclic friction controls are still on.

When manipulating the cyclic trim switch powers up either one of the two motors. One motor positions the cyclic control in the fore and aft position (pitching plane) and the other motor positions the cyclic control left and right the rolling plane.

For the sake of clarity and for our unfortunate friends that fly fixed wing aircraft it must be noted that no trimming is taking place on the blades itself unlike with fixed wings where the trimming takes place via tabs on the control surfaces. So the cyclic trim system in a helicopter simply positions the cyclic control in a desired position therefore alleviating forces on the stick but it does not mean that the helicopter can be flown hands off as that requires an autopilot system which is far more advanced than the basic trim system.

The basic principle of flying with a trim system is to make a change then check, adjust and trim. For example if the speed of the helicopter needs to be increased from say 60 knots to 80 knots the first action will be to make an attitude change with the cyclic control alone by selecting a new attitude outside. This change of attitude has to be checked at some stage when the pilot perceives the attitude for the new speed has been attained. After the airspeed indicator has settled minor adjustments can now be made to the attitude to refine the actual speed that needs to be flown. Only now does the trim system come into play by manipulating the Chinese hat until no forces can be felt on the cyclic control. In other words the trim system should not be used to make the initial attitude change.

Most small helicopters with this form of basic trim system can be flown without using the trim but obviously a lot of forces will be felt on the cyclic control depending on the phase of flight. The trim system can be a pilot's biggest friend but if used incorrectly can be a worst enemy in so far as a person can trim the helicopter completely out of a desired attitude for example.

As said before the aforementioned dealt with a basic trim system as there are more advance systems for more sophisticated helicopters that incorporates Stability Augmentation Systems, Helipilots, Force Trim and Autopilots for example but the method of flying these systems apart from an autopilot in essence remains the same.

© Harry Helicopter Training Syllabus 2008

http://www.harry-helicopter-training-syllabus.com

Motorcycle Riders - Say GOOD-BYE To Black/Scuff Shoe Marks Caused By Gear "Up-Shifting".

Although the first motorcycle was invented over a hundred years ago and has seen many major changes since its first inception, one item which seems to have been forgotten and left out of the technology advancement is the motorcycle gear shifter lever.

And, it's this motorcycle gear shifter lever that, after all these years, has never failed in ruining every motorcyclists' boots and shoes by leaving those tale-tale ugly black shifter marks on them.

Amazing as it sounds, up until now no one has done anything as far as changing or upgrading the gear shifter lever to prevent this irritating problem - which occurs during gear ‘up-shifting' actions.

The other problem with the current hard rubber that comes standard on all motorcycle gear shifters is that many motorcycle riders also may experience discomfort to the upper left foot during long rides having numerous ‘up shifting' actions.

While there are a couple of products out on the market today which do sell slip on boot/shoe protectors, the drawback with these is that they have to be placed on and removed from the riders shoes each time the rider starts or finishes riding. These products also don't offer the rider any type of cushion or comfort while riding.

However, motorcycle riders are in luck now because all of this is about to change. Shiftcush, the revolutionary company which invented the product bearing the same name, designed their Motorcycle Gear Shifter Cushion exactly to prevent all of the above from occurring.

The best part about Shiftcush is that their new easy-to-install gear shifter cushion not only prevents shoes from being ruined but also offers unrivaled shifting comfort by providing an air cushioned padding between the riders foot and gear shifter lever.

This revolutionary air cushion is made by the same technology as used in the Nike Air-Max tennis shoes.

Thanks to Shiftcush, now motorcycle riders can say good-bye to black/ugly shoe marks and any shifter discomfort caused by gear ‘up-shifting!

Anyone wanting more information on the Shiftcush can find can it by visiting their web site at; http://www.shiftcush.com/

About the Author

Is it possible to replace a broken zip/zipper lever?

I am a biker and tend to get through a lot of clothing kit due to zip levers breaking off - boots, jackets, you name it. When that happens I try to find something I can replace it with, normally a paperclip or a key ring placed through the hole.

Any time I have asked a repair shop what to do they say the entire jacket/boot has to be fitted with a new zip, which costs a lot of money!

Since I have managed to repair my kit temporarily myself, surely someone out there somewhere has invented replacement zip levers? How hard could it be? A piece of metal goes through the hole to enable the zip to move up and down, connected to a larger piece of metal that would then fasten shut.

So does anyone know of an item like this available to buy? Should I just give up and buy new kit (even though it's bound to happen again)... Or should I design and patent the idea??

Thanks in advance!

Yes..theres a craze (or was a craze) going around kids about things called 'scoobies'. They are thick plastic similar to pipe cleaners, but they are stretchy and very strong, kids made keyrings etc from them, and my daughter made me a a zip puller for my bag that the lever came of, and its really strong, get a packet of them and you twist and turn them to make things.
They look like this -
http://www.scoobies.net/

Buy them on ebay really really cheap, or local newsagents sell them form about 99p a packet!

Yamaha Grizzly Recall – ATVs Recalled Due to Crash Hazard
MANUFACTURER: YAMAHA MOTOR CORPORATION U.S.A., OF CYPRESS, CALIF.

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