I'm looking for the BVM surface throw recommendations for a King Cat. The manual says to refer to the plans and I do not have the plans. I need them for all surfaces for both low and high rates (ailerons, flaps, elevator and rudder). THANKS!

The KC needs a bunch of throws. I sold mine so this is from memory. The ailerons will need about 1.25". Elev 1.75, rudders 1". Flaps take off 15 dgress and landing 35 degrees plus 1/2" of crow on the ailerons. Set the CG per plans and modify it later. Set triple rates for everything to find out what you like. Good luck....

5" up and down.....Have fun JIM

Hey John, I think I'll go with 6" and turn it into a 3D MONSTER. Tell your Cardens to look out!

Throws are listed here.

Ailerons; high rate 14 degrees up, 13 degrees down; low rate 12.5 degrees up 11.5 degrees down. I run 30% expo on high rates, and 20% expo on low rates.

Elevators; 22 degrees up, 24.5 degrees down, all rates. I run 30% expo for up and 6% expo for down.

Rudders; 18 degrees outboard (left or right depending on side), 15 degrees inboard (left or right depending on side). No expo used except for takeoff, then 20%.

Flaps; 12 degrees for takeoff, 30 degrees for landing.

G500A gyro settings using screen 44 on the 10X; Flaps up - 55%, flaps takeoff - 63%, flaps landing - 72% (this setting can be adjusted higher for heavy crosswind flights)

Crow; ailerons 7 degrees up with full flaps. Elevator settings will need to be dialed in due to cg settings.

Flap settings change with use of a larger motor (P200 type) I have those if you go that route. (I don't recommend it though)

Don't listen to these guys!! Degrees?? Ehab trying to give kingcat throws??? PLEASE!!!

J/k Everyone's trying to help.

Elevator: As much as possible. Especially on landing. Yes, more than 2" is possible.

Aileron: As mush as possible. Atleast 3/4" on crow. Mark Taylor uses all of his up aileron for crow. (Mark Taylor is the guy that wins all those top gun trophies)

Rudder: It doesn't really matter but, as much as possible. Kingcats don't knife edge all that well anyways.

Flap: About 15-20 degrees for take off (not really needed), and 40-45 degrees for landing with just a touch of up elevator (1/16-1/8" ) Did I say degrees???!!! NOOOOOoooooooo.

The kingcat can take anything you dish out. Uncle Bob did a nice job as always.

Raf

Intersting words Ravill.

Your thoughts on all the elevator of all you can get will only result in a snapping out tendancy when you pull too much at the wrong time. As much aileron throw will only cause some serious issues in the roll department as you try to hang on. And with the correct cg and rudder throw a Kingcat will knife edge the length of any field all day long. 40 - 45 degrees of flaps will drop you into the dirt if you run anything less than a 45 pound thrust motor on the bird. The flap area is enormous and should not exceed 32 degrees unless you have a large amount of residual thrust.

I'd be more than happy to show you how my kingcat flies exactly with these settings. Hey, I'm not a BVM rep, but I'm just an honest to goodness flier. I won't BS you. This is what I fly at. That's all.

Raf.

PS Apologies if my comments were offensive.

PSS I love my jets too much to knife edge them much anyways. I've tried a few times with the KC and basically, I'm a wimp

Thanks so much for all the help! This is my maiden flight on this cat and want to set it up so its gentle for the first few flights. I have a Bobcat composite and can't imagine that its so different. If someone could convert the degrees to inches it would be a big help. Better yet, what are the throw that BVM recommends?

jclittle,

I cannot find my Kingcat manual as it is still in a box (I am guessing here) from my move a year ago. The inches measurement will give you an in the ball park throw setting. The best thing you can do is to buy a throw meter from CRC and begin to use degree settings. Your control throws will be much more acurate and the planes will fly better. The thorw meter from CRC is one of the best investments you can get for jet modeling for $24.95 from Central Hobbies. I am sorry I cannot find the manual, but a call to BVM will get you the settings in inches. I can say from setting up countless Kingcats (well over 40 or 50) since they came out and over 700 flights on my own, the settings I listed above will be a very nice smooth flying bird with absolutely no tendancies of snapping out at any time in flight regardless of what manuever you are doing. This is with the CG set on the dots as per the factory settings. Using the settings listed by Ravill will give you some very hairy flight characteristics during certain flight envelopes, especially during takeoff, landing, and square corners or hard pulls. My settings are lower than what BVM states in the manual, and suit my flying style.

Sounds like the best thing you can do is to exercise teh cell phone and call 407-327-6333, and ask for Tommy Dodgen, he will get you the numbers from the manual.

John - since I really not into 3D flight, especially on a maiden flight I will give BVM a call - thanks for all the help! Jim

JClittle,

I won't argue with John. This is just a place for us to BS with each other.

My first flight with my kingcat, I used full elevator for flare with 1.75" throws. I don't like going to full deflection, esp on landing, so I give my self more throw for safety. My kingcat doesn't snap or act hairy, EVER. [8D] She is balanced RIGHT ON the factory holes in the booms.

I haven't built 40 or 50 kingcats and I don't have 700 flights on mine. I'm not a rep. I've had my KC for 2 months and I only have 50 flights on mine.

No matter what anyone says, the KC is a GREAT FLYER. It is an honest airplane and will respond exactly the way you will put in inputs. Call BVM, that's what I did.

Raf

Hey Raf....I'm just busting on Jim with that response. We are best buddies and can't let him post something like that without having alittle fun with him

John

KingCat throws

Ail-measured at tip 1 1/16" up 7/8" down

Elevator 2 3/8" up and down

Rudder-measured at the top of the trailing edge 1" in 1 1/2" out

These measurements are from the KC plans

I don't have the wooden gauge for the flaps right now but can get it tomorrow and give you the degree of throw if you still need it.

For the crow, about a 1/4" to 3/8" up for the ailerons and it is trial and error for the elevator.

John - flew the maiden today with a total of 3 flights using the throws you recommended - everything was perfect. She floats compared to my Composite Bobcat, I guess I need to back off on the power on that Rhino sooner! Talk about fast, and the sound it makes is awesome Thanks again for the advice.

Glad to here it went well for you. That Rhino should push it with great performance, I bet it accelerates like a scalded dog.

Yep on the floating side, it will float for what seems forever at times. Enjoy the new bird my friend.

My Kingcat has a tendency to climb when flying it at high speed unless I apply a slight amount of down elevator. It seems to me that I read somewhere in the forums that adding a washer to increase the down-thrust of the turbine will help with this. Could someone confirm this? I could not find the previous post. Thanks.

Here's the quote from the KingCat assembly and operation manual page 42:

FLIGHT TRIMMING
"If the model climbs at high power and high speed add 1 or 2 (#4) washers under the front of the engine mounts to tilt the back of the engine down a bit more."

A little downthrust will make a definate change. Add one washer and test fly, then add the other washer if necessary. Don't forget to remove the previous down elevator trim.
Hope this helps.....

Harley Condra
BVM REP
JetCat REP

Hello guys!
I need to know about the CG?
Im having a hard time to land it in 300ft runway!
And wath shoud i use on the brake soo it dosn't lock!

Thanks

http://bvmjets.com/Pages/tips1.htm