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Troubleshooting the Beaver family of ultralight aircraft - Control System Failure
UltralightNews.com
Lorem Ipsum is simply dummy text of the printing and typesetting
industry. Lorem Ipsum has been the industry's standard dummy text
ever since the 1500s, when an unknown printer took a galley of
type and scrambled it to make a type specimen book. It has
survived not only five centuries, but also the leap into electronic
typesetting, remaining essentially unchanged.
Beaver, Beaver ultralight aircraft, Beaver RX 35 ultralight
aircraft, Beaver RX 550 ultralight trainer troubleshooting report.
Spectrum Beaver RX 550 Rudder cable failure:
Owners report failure of the rudder cables (#2416-02) on model RX 550 aircraft. The cables are apparently fraying. This should
be an area of regular inspection. The following in advisory #028 issued by the builders of the Beaver.
As a result of information received from operators and constructors of Spectrum products and as a result of a major overhaul
carried out on an RX 550 with 590 hours time since new the following technical highlights have been compiled.
1. As a result of turning the rudder horns to clear the horizontal stabilizer struts there has been a problem on tail wheel
equipped aircraft with the tail wheel side plates contacting the underside of the rudder horns and restricting free movement of
the rudder. This can be reminded by placing AN970-4 washers between the plug and the swivel block. Use the minimum number
of washers required to gain clearance. Increase the length of the 1.4" bolts by 1 dash number for every 2 washers installed.
2. Addition security can be gained on landing gear by using 2 stainless steel tangs on each end of the drag struts. This provides
back up in the event of failure of the tang. It does not double the strength of the joints but provides additional protection for
aircraft, occupants and parachute.
3. All seat belts and seat belt attachment hardware should be replaced after any major accident, etc. and should be replaced
after 500 hrs in service as a matter of course.
4. The front seat mounting brackets have, on training aircraft been found to be collapsing into the control stick connector
pushrod. All operators are advised to monitor the condition of the bracket and replace it before it can contact and interfere with
the push rod.
Beaver Ultralight Aircraft Fabric Testing:
One of the reasons for the Beavers popularity is its quick build
time. This is a result of using dacron sailcloth. This fabric if left
unprotected, can loose 90 per cent of its strength in as little as
a year. Check the colour of your fabric!
The wings fabric colour should be the same colour top and
bottom. If the top side of the wing is faded, compared to the
underside it should be checked using a Maule tester or the
"Quicksilver" tester.
For more information watch this video clip.
Warning:
On Beaver RX 550 aircraft flown with rear shoulder harnesses: Several owners have reported their shoulder harnesses coming
in contact with the propeller, when they have inadvertently left them undone. It is recommended that some kind of retaining
strap be installed to prevent this from happening.
