Servo setup for DP Ultimate?
 

I'm contemplating getting a DP Ultimate (The Big One) and I need some advice on what servo setup to use. I'm thinking about using a Hitec HS-645 for the elevator and another for the rudder. I'm also thinking about using HS-85's on the ailerons and a HS-81 for the throttle.

I want to use the HS-85's on the ailerons to save weight but I'm not real sure that they have enough torque. (Doesn't the DP Ultimate use a servo for each aileron?) Is this a good idea or should I go with standard servos or even high torque on the ailerons?

Also, are metal gear servos best suited for this type of application or should I use servos with the nylon gears?

Does this setup sound pretty good for the money? I don't think I want to go the digital route.

Any better ideas? I know the DP Ultimate has been out there for a while and I'm sure there are some great time tested setups for this airplane that you guys already use.

Thanks, Bozwth

Servo setup for DP Ultimate?
 

bozwth

The Hitec 645 will be fine on the elevator and rudder.. For the ailerons you can use 605's.. I flew one of these the other day. I test flew it for a friend who brought it out for the first time. What a nice flying bipe. Takeoff and landings are a total breeze. It rolls nice and it is pretty aerobatic. It is a clean flying airplane and it has a large presence in the air.. You will definitely be happy with it. I'm not sure if it comes with tail wires but I would add them because it looks a little flimsy.

Servo setup for DP Ultimate?
 

If you can get a plane, they fly great. I've only done some simple circuits, but I had someone put it through its paces. Torque rolls, flat spins amazing. I din't have to trim anything and balance was perfect. Maybe even slightly tail heavy.

I used Futaba 9402 for rudder pull-pull and a 9402 on each half of elevator with carbon fibre rods. Pull-pull on elevator was not worth the trouble for me and I can't fly that precise anyhow. For each aileron and throttle I used Futaba minis - forgot the number as high torque isn't need. Saito 150 and 16oz tank. Being a new engine and running rich I have to set up for landing after 6 minutes.

As posted numerous times, the landing gear is way too soft unless you grease the landing. Even standing still, the gear flexes out quite a bit. I would get a better set and paint it. I am putting cross braces on mine now because of a dead stick landing came in a little hard, the gear flexed enough that the wheel pants hit the undside of the bottom wing and broke the sheeting. Nothing structural, but it still ticked me off.

I'm still taking it easy this year, but once comfortable with. I know it will perform. Problem is storing it and putting it in the van assembled. I have to take off the top wing, but that isn't too bad.

servos
 

I used 4 servos in the wings and used the standard ones that came with the radio. For the tail I used FMA coreless servos.
These have a transition time of .10 and around 70 some torque
ounces, they are also metal gears and have ball bearings.
I hooked them up with pull-pull cables on the rudder and the elevator. It has performed with no troubles and has unlimited performance.
You could use 2 servos in the wings and connect the upper aileron with rods. I'm not sure about the ultimate but the pitts was
tested both ways with no problems.
Electropiep

Servo setup for DP Ultimate?
 

I just bought a DP Ultimate. I'm putting 4 MPX Royal Digi servos in the wings and JR 8411s on the elevator and rudder. Throttle will be a 425 or 517, whatever is at hand.

I'd heard that the u/c on this plane is a little on the tentative side, so I picked up a set of CF gear from Troybuiltmodels.com. Nice and light, with no flex.

Changing your Main Gear
 

Visioneer,
Do the wheel pants bolt up the same on ths CF gear?
Are thay worth the effert to change?

Dave

Servo setup for DP Ultimate?
 

I'm using Hitec 225 MG servos on the ailerons.

Servo setup for DP Ultimate?
 

225bb x 4 for ailerons....5945 rudder....5925 elevator....85bb throttle......feels REAL good!!

Servo setup for DP Ultimate?
 

The gear comes with holes drilled for the axles, that's all.

I haven't received the plane yet :):) so I can't address how difficult it is to attach the pants.

Worth the effort? After reading about the wheels being driven into the lower wing sheeting and $80+ CF props getting broken because of the stock gear splatting out on average landings... yes I'd say its a Good Idea. An ounce of prevention and all that.

Hitec 225's
 

Those Hitec 225's sound like a better choice than the 85's I were originally thinking about using and only 5 bucks more. Less weight than standard servos but more torque and speed. I hadn't heard of those before.

My new revised servo setup is now Hitec HS-225's in the wing, Hs-645's in the tail and HS-81 for the throttle. Sound pretty good?

I guess metal gears are the way to go as well. I wouldn't think that they would be necessary in an airplane. I could see how they would be necessary in something like an RC monster truck where they are banging against the ground and the chance of stripping out servo gears would be more of an issue. I take it that they are the preferred choice though when it comes to acrobatic airplanes.

Bozwth

Servo setup for DP Ultimate?
 

Uh Oh,

Now I have to go and research those 5945's and 5925's to see what those are. They sound like they could be even better!

Bozwth

Servo setup for DP Ultimate?
 

5925's and 5945's are Hitec digitals

Re: Hitec 225's
 

The geartrains in mini and micro servos are plenty strong but are not massive enough to survive a sudden shock. Metal gears in these application give some additional protection against stripping at a slight weight and longevity penalty (the metal geartrains weigh more and wear out faster than plastic gears)

Its a tradeoff.

Servo setup for DP Ultimate?
 

i am running jr 531 on ailerons 45 oz
jr 8101 on elevator 90 oz
jr 8411 on rudder 155 on 4.8 oz i am running a 6 volt system

Servo setup for DP Ultimate?
 

I still havent finished setting up my Ultimate... You sound like you are on track with your servo choice, I'm glad you changed your mind from the HS 85's. The torque ratings are fine, but the gears are too small for the Huge aileron surface, the engines vibration would tear them up in a couple flights. I'm speaking for the vibration of a 120-150 Fourstroke, but anything in that size range will damage a geartrain. I would steer clear of the 605's, I have a few and I have centering problems with all of them.

I'm setting mine up for 3D. I too bought Troybuilt CF gear, in matching yellow color :cool:, a YS 120, slimline muff for smoke, JR 4721 for Rudder, JR mini Digitals for ailerons, and two 4131's set up with CF tillers for Elevators, and powerflite batteries.

Trying to keep it very light, I'm hoping to really be able to fly the wings off! I love the plane so far, even though its only hanging from my ceiling! :D

Good Luck!

Servo setup for DP Ultimate?
 

Will the vibration from the engine be too much for a HS-85 if its just used for the throttle? That's what I'm planning to use to save a little weight.

I'm also planning on using a YS FZ120 on it. And using the carbon fiber gear of course.

Bozwth

Servo setup for DP Ultimate?
 

The HS 85 wont have any problem with the throttle. Its when you link it to a big surface that "absorbs" vibration.. Then you'll start stripping gears.

Sounds like your doing well so far! :D

Servo setup for DP Ultimate?
 

I have been flying my ultimate for 2 years (one of the first). I have 4 GWS coreless, metal gear servos in the wings, (as per Dave Patricks suggestion), a GWS coreless, 100+oz. servo w/pull pull, on the elevator, a std BB servo on the rudder, w/pull/pull, and a std BB servo for the throttle. Engine is a Saito 150. Amen to the posts that warn about the weak landing gear. I stalled the plane (engine failure), near the ground, and splayed the gear out straight, piercing the covering under the wing. I have since replaced the gear w/a carbon fiber. The plane also has a weak tail wheel. Other than that it is a great plane. I would buy another one in a heartbeat if I lost this one.

Good luck, Bill White

Ultimate
 

I'm on my second one and while I'd agree the LG are a little light, it takes a pretty good lick to flatten them. Mine scuffed the bottom of the wing once but I did dork it quite a bit.

I'm using Futaba 3004BB's on the ailerons, a 615mg on the rudder and a Hitec 925MG on the elevator.

Webra 120 turning a 16X8 APC on the nose. Sweet flying machine!

Servo setup for DP Ultimate?
 

The order is going in on the servos. 2 HS-645's, 4 HS-225's and a HS-85 driven by a Hitec 8 channel Supreme Receiver. I'm planning on using a six volt battery pack with a voltage regulator. Any Idea on the size of the battery pack that I should get to power this setup? I was thinking a 1500mA NiCd pack, but I really don't know what I need. How do you determine what size battery pack to use with a servo setup like this? I assume its a balance between weight and battery life.

Thanks, Bozwth

Powerflight Pack?
 

Coulter_Dean,

Sounds like a pretty sweet set up your'e putting together. I'm trying to keep mine light as well. What size powerflight battery pack are you using? I want to keep it light, but I want to make sure I have enough juice.

Bozwth

Servo setup for DP Ultimate?
 

Thanks, I hope to have a "super light" bipe :)

I will use two Powerflite "power-bar" 1200mah packs, and two JR chargejacks. I wanted to use the powerbars because they are really pretty small, but weigh alot less than the round cheaper ones. The round ones actually weigh more than AA nicads. They also will stack neatly and fit right where the manual says to put the batteries.

:)

Servo setup for DP Ultimate?
 

Not familiar with Powerflight powerbars or the round ones. I'll have to check those out. Why do you need two? Are you using two receivers? I was thinking about running a 6v, 1500mah NiCD with my setup. Is that not enough?

Bozwth

Servo setup for DP Ultimate?
 

anybody having problems with 225bb's on ailerons? I have recently read of problems of gear stripping on other planes but not a DP Ulty

Servo setup for DP Ultimate?
 

I've got some Hitec 225 MG's on the two elevator halves of my Cap 231 EX running on a 6 volt system and have yet to have a problem with them. The one this I do notice with them is that they don't seem to center as well or are as precise as the 500 serries Hitec servos. I'm kinda in your boat as well as I'm going to be getting the big DP ultimate too. i was also thinking on the same lines as you with getting the 225's for the ailerons but I'm honestly still up in the air about it. I'm also trying to decide on the power plant. I've got a Saito 180 that I could put in it but I'm not sure about that either.... I'm thinking YS 140 (if I can find a deal) or possibly a Brisson 2.4 because I'd really like to have a gasser.....Still up in the air on that too.

Keep us up to date with what you decide!!


HSH