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Topic: Ruddervator

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	[No title]
		The two tail servos are connected to the receiver as follows: elevator servo to left ruddervator, and the rudder servo to the right ruddervator (check to make sure that each servo is operating in the correct direction.
		At this stage, the left rudder stick on your transmitter should move the right ruddervator and the right elevator stick on your transmitter should move the left ruddervator.
		If the ruddervators move in the wrong direction, reset the value to zero by pressing the clear key and then pressing the (©) key until the ruddervators move in the appropriate direction.
	seattleareasoaringsociety.com /soaring_info/techdocs/v-tail.doc (1753 words)

	R/C Sailplane Glossary
		On a v-tail, this is also known as a ruddervator, as they can serve the same purpose.
		- Ruddervator is a term that describes a control surface that is combination of rudder and elevator.
		Ruddervator is the name of the moving surfaces present on a v-tail plane.
	www.fatlion.com /sailplanes/glossary.html (3362 words)

	Simple Aerodynamics Of The V-Tail (Site not responding. Last check: 2007-10-23)
		This is shown in Figure 3.1A by the force vector labeled S = E to denote that the sum of the forces (S) comes exclusively from the elevator (E).
		The sum of the forces, S, is straight down, with the yaw effects from left and right ruddervators (L and R) exactly canceling.
		On the V-tail, the left ruddervator will be up, and the right ruddervator will be up less than the left or perhaps even down depending upon the size of the yoke and rudder displacements.
	www.beechcraft.org /vtail/eckalbar/rudder.html (588 words)

	B179
		The more that the ruddervator can assist with pitch and yaw, both in hover, horizontal and vertical flight plus autorotation, the less control that is asked from the rotor.
		The front of the ruddervator is associated with the rotor disk azimuth of 315 (approx.) degrees.
		The load on a cable is only that of 1 (of 2) ruddervator and the ruddervator is not moved to a fixed stop, where addition loading could be put on the cable.
	www.synchrolite.com /B179.html (1410 words)

	ASK DJ Aerotech Question
		When you move the ruddervators in opposite directions, the "up" and "down" portions of their lift forces cancel each other, but their sideways lift force components combine to push the tail to one side or the other.
		Meanwhile, both ruddervators are trying to push the tail to the left (and therefore push the nose to the right), which results in a "right" rudder command.
		The ruddervator that moves "up" often gets an end-plate effect from the other half of the tail, which helps it generate a little more lift.
	www.djaerotech.com /dj_askjd/dj_questions/ruddervators1.html (639 words)

	B244
		IDEA; The larger the controllable tail surfaces are (ruddervator only since rudder is fixed?) the less cyclic has to go to the rotor disks to achieve the same results.
		This means that the downwash striking the ruddervator from one rotor is very closed to being midway between the downwash pulses from the other rotor.
		There could also be an oscillatory rotational force on the tail at 2P since the downwash from the two disks will probably have some rotation and the port disk will have more impact on the port ruddervator there by causing a CCW torque on the tail.
	www.synchrolite.com /B244.html (1399 words)

	DJA Chrysalis - Ruddervator Information
		For normal turns, you should need little or no rudder deflection after rolling to the desired bank angle, so whether or not you have ruddervator differential should be pretty much irrelevant during the turn.
		The reason for ruddervator differential is to balance the forces between the two sides during rudder deflections.
		Because the up-moving ruddervator gets an end plate effect from the other tail panel, and the down-moving ruddervator doesn't, for equal deflections the up-moving ruddervator develops more force than the down-moving ruddervator.
	www.ov-10bronco.net /users/merlin/Flight/chrysalis-differential.htm (2040 words)

	Charles River Radio Controllers - V-Tail Adverse Yaw
		For may V-tails, the ruddervator on one side (usually the up-going side) gets a bit of an end plate effect from the other stab, while the other ruddervator doesn't get as much benefit.
		As a result, for equal angular deflections, one ruddervator (usually the up-going one) makes a little more force than the other ruddervator, which results in a slight pitch change (usually nose-up) whenever you apply rudder.
		By adding a little differential we can give the ruddervator that doesn't get the end-plate help (usually the down-going one) just a little more travel, so that the forces developed by the two ruddervators are equal.
	charlesriverrc.org /articles/design/donstackhouse_vtailadverseyaw.htm (555 words)

	Tdata AD
		If the effective date of ruddervator control ruddervator is outside the AD 94-20-04) and surfaces in specified limits, balance thereafter prior to accordance with the ruddervator control further flight Section 3 of Beech surfaces.
		Accomplish the balancing prior to further flight after the ruddervator is found outside the specified limits.
		Specifically, the visual inspection of the empennage, aft fuselage, and ruddervator control system with any subsequent repair and the setting of the elevator controls, rudder and tab system controls, cable tensions, and rigging should all be a one time action.
	www.tdatacorp.com /93-CE-37.HTM (2528 words)

	Lazair.com Lazair Technical bulletins, Aviation Hardware, AN, Radio, Transponders,Files, ROTAX Service
		The 47 bolt that fits into the P1 at the root end of the ruddervator should be held in by bottoming the bolt thread in the threaded hole and should not tighten on the B4.
		Although the tail of the Lazair has been designed to withstand the loads imposed by nommal and very heavy landings it is not indestructible We have had a report of one aircraft which was taking off from a rock-strewn field and struck the tall on a large rock at high speed just prior to take-off.
		The impact was sufficient to bend the rear stabilizer tube T1O and dislodge the outboard ruddervator hinge pin.
	www.lazair.com /tech.htm (16582 words)

	MiniWave EDF llustrated Building Instructions - Click Trip Model Airplane News (Site not responding. Last check: 2007-10-23)
		The ruddervators are built flat, directly over the plans and are then sheeted on both side with1/16” balsa.
		Temporarily install the hinges then insert the ruddervator into the fuselage notch and allow it to rest on top of formers F-10 and F-11 at a 30 degree angle.
		Glue a short length of balsa in place to form additional gluing surface for the ruddervator as shown in the detailed section drawing on the plans.
	www.modelairplanenews.com /CLICK_TRIPS/may05/miniwave_1.asp (824 words)

	RC Groups - Smart V-tail - elevator or ruddervator
		Jan 13, 2003, 03:22 PM As great as my first flight was on my Smart, I felt like it would have been nice to have rudder control to keep it really straight on the vertical climbs.
		Would ruddervator be helpful in achieving this with the Smart V-tail.
		Jan 13, 2003, 05:03 PM Ruddervator does work well on the Smart.
	www.rcgroups.com /forums/archive/index.php/t-85277 (182 words)

	Empennage
		The choice is between the Ruddervator and the Stabilator, with the stabilator being the current preference.
		It has an inverted 'V' configuration and both airfoils are sloped down at 45 degrees from the horizontal.
		This force is used to compliment the yaw forces caused by the rotors.
	www.unicopter.com /Empennage.html (244 words)

	YF-23 Black Widow II
		Featuring a diamond-shaped planform, two large, sharply-canted ruddervators, and a serrated aft profile, the high performance aircraft was larger than the F-15 it was designed to replace.
		Another advantage of using such unusualy shaped flying surfaces, is that the uncontrolability of the aircraft is increased so that when fly-by-wire is used, the manueverablity of the aircraft is increased greatly.
		This ruddervator is angled at a roughly 45° angle to horizontal.
	www.globalsecurity.org /military/systems/aircraft/f-23.htm (1741 words)

	B233
		Ruddervator axles point down at 45 degrees from the horizontal.
		At maximum yaw left ruddervator is pitched down 30 degrees.
		At maximum yaw right ruddervator is pitched up 30 degrees.
	www.unicopter.com /B233.html (964 words)

	Borigging (Site not responding. Last check: 2007-10-23)
		On mine the left ruddervator was ~4" above neutral and the right was ~1.5" above neutral.
		The ruddervators are then checked and set for neutral, neutral being 0 dig of travel, or in line with the tail.
		The travel of the ruddervators should be checked also and set to the values in the maintenance manual for your plane.
	www.elelink.org /Borigging.html (561 words)

	SMV (Site not responding. Last check: 2007-10-23)
		The unstructured grid consists of 2.65 million cells and half of the geometry was modeled due to symmetrical flow.
		The second area of interest was to evaluate the interaction of the wings and ruddervators.
		Figures 5-7 reveal an area near the root of the ruddervator that contains a region of circulating flow, possibly impacting the effectiveness of the ruddervator.
	www.cobaltcfd.com /Apps/appl-smv.htm (380 words)

	ASK DJ Aerotech Question
		Is the direction of movement for left and right ruddervator inputs different in an Inverted to Upright V-Tail or is it just the induced yaw effect that changes with the v-tail inverted ?
		A right rudder input would be right ruddervator UP and left ruddervator DOWN.
		To make sense of all of this, imagine increasing the dihedral of the tail panels to 90 degrees per side, so the panels are both pointed straight up for an upright V-tail, or straight down for an inverted V-tail.
	www.djaerotech.com /dj_askjd/dj_questions/rudvatdir.html (181 words)

	[No title]
		Vertical Stab, which is a fixed fin with a rudder built in to the trailing edge.
		Ruddervator is an all moving tailplane (SR-71 and some STOL aircraft).
		If you use Ruddervator you cannot use the rudder checkboxes.
	quashnick.net /hobbies/FirstPlane02.html (909 words)

	Weighing the Components and Selecting the Gear
		When you add the weight of the airborne components to the 7.72 oz airframe, the total weight is now up to 11.48 oz.
		DJ Aerotech says the Wizard will fly great in the 12-13 oz range, I decided to swap out the two VS -100 ruddervator servos for two FMA S-80’s.
		The reason for the swap was that the S-80’s are advertised as being quite a bit lighter, although they do put out less torque.
	www.balances.com /sp1.html (538 words)

	Kolibri Plans
		(Make sure the ruddervators form a left and a right.) Trim the mylar about 3mm oversize with a razor blade.
		CA the 18mm-long styrene ruddervator pivot tubes, front and rear cabanes and tail wheel strut into the fuselage holes.
		Temporarily assemble the airplane and slide the battery tray until desired CG location is obtained.
	www.homefly.com /reference/Kolibri_plans.htm (466 words)

	RE: Building a Bonanza
		When using the VTail mixing option in the radio, you plug one ruddervator into channel 2 and the other ruddervator into channel 4.
		How about attaching the steering servo to a y-harness with a ruddervator servo that's going in the proper direction when rudder is applied?
		Since it will only be used on the ground it theoretically should work BUT the fun comes in when you need to use elevator on the ground.
	www.rcuniverse.com /forum/m_348045/mpage_5/printable.htm (2760 words)

	V-Tail Mixing
		If I push forward on the right stick, both ruddervators will go down.
		Remember that you're dealing with the yaw axis (not the roll axis) and it should become more clear.
		You are correct about both ruddervators moving up when you pull back on the elevator stick.
	www.rcuniverse.com /forum/m_1950146/tm.htm (961 words)

	Beechcraft Ruddervator Seal/Tail Root Seal from Aircraft Spruce
		Beechcraft Ruddervator Seal/Tail Root Seal from Aircraft Spruce
		A set of two ruddervator seals for model 35.
		A set of two tail root seals for models 33,36.
	www.aircraftspruce.com /catalog/appages/ruddertailrootseal.php (68 words)

	AD Watch
		Owners of V-tailed Bonanzas must repetitively inspect fuselage bulkheads for signs of failure.
		Also, repetitive inspections of the empennage, aft fuselage and ruddervator control system become a one-time action with any subsequent repair and the setting of the elevator controls, rudder and tab system controls, cable tensions and rigging.
		Cessna 414A and 402C owners must inspect the wing spar caps for fatigue cracks, apply any necessary repair or replacement and incorporate a spar strap modification on each wing spar.
	www.avweb.com /newswire/9_21a/briefs/185028-1.html (173 words)

	[No title]
		Subject: Beech-List: ruddervator balancing washer --> Beech-List message posted by: "Randy L. Thwing"
		Hello List: With all the ruddervator balancing going on, Does anyone have a genuine Beech ruddervator balancing weight (washer)?
		I am seeking the dimensions and weight of the real thing.
	www.matronics.com /digest/beech-list/Digest.Beech-List.2003-10-01.txt (685 words)

	Futaba 8U programming for 6 channel gliders
		Once the setup is completed, this will not be an issue.
		channel 2 - ELE1 RUD2 - right ruddervator channel 4 - ELE2 RUD1 - left ruddervator
		SWA up - camber SWA down - butterfly/crow Launch mode: Three position switch.
	members.cox.net /jeffareid/futabaa.htm (1143 words)

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