40
41
Head Dampening Shims and Tuning Cyclic Response
The rotor head (main rotor blade) dampening of your Blade 400 3D model can be adjusted in order to
tune the cyclic response and stability of your model. In general, stiffer dampening will result in quicker
cyclic response with a slight reduction in stability (when compared to softer/less-stiff dampening). The
dampening of your Blade 400 3D model has been set to provide a good balance of cyclic response
and stability right out of the box, and we suggest that you make your first flights with this amount of
dampening before making any changes.
If, after the first few flights, you would prefer to have even quicker and more aggressive cyclic
response, you can stiffen the rotor head dampening by adding shims (in addition to the shims that
were factory-installed) between the O-Ring (025) and Step Washer (020) on each side of the Head
Block/Rotor Housing (see the “Exploded View Parts Listing” and “Exploded View Drawing” pages for
reference). Head Dampening Shims are available separately in packs of eight (EFLH1144), however,
you should add only one shim per side at a time before making each subsequent test flight, until you
find the dampening at which you prefer the cyclic response (and stability) most.
Note: You must always install an equal number of shims on each side of the Head Block/Rotor
Housing.
Note: If you install too many shims, and the dampening becomes too stiff, the helicopter can
wobble and shake in flight. Take care when making test flights after adding shims to prevent
crashing the model as a result of a wobble or shake. Typically, we find that adding an additional
1–2 shims per side with the stock power system works well for more aggressive pilots and 3D
flying. Adding too many additional shims per side can cause the model to wobble and shake.
Again, exercise extreme care when test flying the model after adding any number of shims.
Other options for tuning the cyclic response of your model include adjusting the aileron and elevator
Swashplate Mixing (SWASH MIX), Dual Rate (D/R) and Exponential (EXPO) values in the transmitter
(please see the manual for the DX6i for more information), as well as the installation of different length
flybars and different weight flybar paddles (please see your favorite retailer or visit our web site for
more information).
Recommended Maintenance
Routine maintenance is necessary to keep your Blade 400 3D in optimal and safe flying condition.
Some of the most important things to check routinely include:
• Ball Links
Before each flying session, check to see that the plastic ball link ends are secure, but not tight
(binding), on the linkage/control balls. The plastic ball links can wear over time, and if they become
too loose on the control balls, they can separate from the ball in flight and cause a crash. Be sure to
replace any worn ball links before they fail.
Also, any ball links that are tight (binding) on the linkage/control balls can be loosened by carefully
squeezing the sides of the link with a pair of pliers. However, exercise extreme care when “sizing”
the ball links as it is possible to loosen them too much for safe use.
• Bearings
The one-way bearing in the main drive gear should be cleaned using isopropyl alcohol or electric
motor spray, then lubed with lightweight oil, approximately every 80 to 100 flights. All other
bearings typically exhibit very long life and normally only need to be replaced if they ever become
notchy (sticky in places when turning) or draggy.
• Oiling
It’s important to apply a small amount of lightweight oil (like TRI4026) to any areas where a bushing
may ride on a shaft, especially after replacing any of the parts with new ones after a crash. Some
areas to oil include where the washout base bushing and swashplate control ball ride on the main
shaft, and where the tail rotor control pitch slider bushing rides on the tail rotor shaft.
• O-Ring Head Dampeners
The O-ring dampeners in the head block will periodically wear and lose their elasticity. Worn
O-rings can cause main rotor blade tracking problems as well as stability and control response
issues. If you begin having trouble with the blades going in and out of track during flight, or if the
helicopter feels loose and “mushy” during flight, it is likely time to replace the O-ring dampeners.
The O-ring dampeners can wear out in approximately 30 to 60 flights depending on how the model
is flown.
Also, when replacing the O-ring dampeners, it’s important to lubricate them with grease or
petroleum jelly to prevent friction.
• Tail Rotor Drive Belt
It’s typical for the tail drive belt to stretch slightly over the first few flights. When new, frequently
check and adjust the belt tension as required. After approximately 20 to 40 flights, the belt elasticity
will stabilize, requiring little to no additional tension adjustment.
2007 official ama national model aircraft safety code
GENERAL
1) I will not fly my model aircraft in sanctioned events, air shows or model flying demonstrations until it has been proven to be airworthy by
having been previously, successfully flight tested.
2) I will not fly my model higher than approximately 400 feet within 3 miles of an airport without notifying the airport operator. I will give
right-of-way and avoid flying in the proximity of full-scale aircraft. Where necessary, an observer shall be utilized to supervise flying to
avoid having models fly in the proximity of full-scale aircraft.
3) Where established, I will abide by the safety rules for the flying site I use, and I will not willfully or deliberately fly my models in a careless,
reckless and/or dangerous manner.
4) The maximum takeoff weight of a model is 55 pounds, except models flown under Experimental Aircraft rules.
5) I will not fly my model unless it is identified with my name and address or AMA number on or in the model. (This does not apply to models
while being flown indoors.)
6) I will not operate models with metal-bladed propellers or with gaseous boosts, in which gases other than air enter their internal combustion
engine(s); nor will I operate models with extremely hazardous fuels such as those containing tetranitromethane or hydrazine.
RADIO CONTROL
1) I will have completed a successful radio equipment ground range check before the first flight of a new or repaired model.
2) I will not fly my model aircraft in the presence of spectators until I become a qualified flier, unless assisted by an experienced helper.
3) At all flying sites a straight or curved line(s) must be established in front of which all flying takes place with the other side for spectators.
Only personnel involved with flying the aircraft are allowed at or in front of the flight line. Intentional flying behind the flight line is
prohibited.
4) I will operate my model using only radio control frequencies currently allowed by the Federal Communications Commission. (Only
properly licensed Amateurs are authorized to operate equipment on Amateur Band frequencies.)
5) Flying sites separated by three miles or more are considered safe from site-to site interference, even when both sites use the same
frequencies. Any circumstances under three miles separation require a frequency management arrangement, which may be either an
allocation of specific frequencies for each site or testing to determine that freedom from interference exists. Allocation plans or interference
test reports shall be signed by the parties involved and provided to AMA Headquarters. Documents of agreement and reports may exist
between (1) two or more AMA Chartered Clubs, (2) AMA clubs and individual AMA members not associated with AMA Clubs, or (3) two
or more individual AMA members.
6) For Combat, distance between combat engagement line and spectator line will be 500 feet per cubic inch of engine displacement.
(Example: .40 engine = 200 feet.); electric motors will be based on equivalent combustion engine size. Additional safety requirements will
be per the RC Combat section of the current Competition Regulations.
7) At air shows or model flying demonstrations, a single straight line must be established, one side of which is for flying, with the other side
for spectators.
8) With the exception of events flown under AMA Competition rules, after launch, except for pilots or helpers being used, no powered model
may be flown closer than 25 feet to any person.
9) Under no circumstances may a pilot or other person touch a powered model in flight.
Содержание Blade 400 3D
Страница 24: ...46 47 NOTES NOTES ...