RE: Great Planes Reactor GP/EP 3D ARF .46-.70

RE: Great Planes Reactor GP/EP 3D ARF .46-.70
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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 1/31/2007 8:39:37 PM

Posts: 601
Joined: 7/19/2006
From: Charlottesville, VA, USA
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quote:

ORIGINAL: cmala3

I'll try to take a couple of pictures tonight. I ended up cutting away most of the cowling around the engine but, oh well. I have been considering purchasing a 4-stroke for this plane but I haven't decided yet on the saito 82 or the ys 63. It looks like the Saito is eaiser to get right now than the YS. I'll buy a new cowl if I get a FS engine. I want enough power to work on 3D stuff with this plane and the 46FX isn't going to cut it.

If you decide to get a Saito, go HERE and shoot him an email asking for a price. There is not a better price to be had on brand new Saito engines. I got a brand new Saito 1.00 for $250 SHIPPED. If you do find a better price, please let me know.

_____________________________

"Toy airplanes are for people with more money than sense."
- My Ex-wife

(in reply to cmala3)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 1/31/2007 11:18:05 PM

cmala3

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From: , AL,
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Ok, here are a couple of shots of the engine with cowl attached.

I didn't realize that my PVC cutting generated so much dust that it migrated over to the airplane

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(in reply to RobertC)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 2:01:51 AM

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From: Anchorage, AK, USA
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Thanks for posting the pictures. The manual is a bit unclear about mounting a two stroke, but I was planning on rotating the motor 90 degrees CCW (as viewed from in front of the plane) and either having the muffler protrude into the cut out below the firewall or possibly getting a Pitts style muffler and just having it exit the bottom of the cowl.

Since the .46AX is on the list of recommended engines, I presume it would fit that way - but confirmation from someone who's done it would be nice. I know, I should probably just go out and buy the Reactor already!

(in reply to cmala3)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 2:28:50 AM

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From: Spruce Pine, NC, USA
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Tom,
I have a Phoniex Model Giles 202 with a Super Tigher 45 mounted as you stated. The motor and is mounted 45 degrees up from the bottom with the muffler right under the cowl. This looks good and gets the exaust and mess under the plane. If i were putting a 2 stroke on the Reactor thats how I would do it.

(in reply to Tom Simes)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 4:10:55 AM

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From: Charlottesville, VA, USA
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Thanks for the pics, Cmala. I too thought you were going to rotate the engine 135 degrees from vertical, putting the muffler directly under the plane. At least this way you won't have to worry about adequate cooling or fighting to reach the needles.

If you ever decide to mount it at 135 degrees, it would be very easy, I think. The engine mount can easily be rotated 90 degrees, giving you the desired placement, and I suspect you can get a replacement cowl and simply cut it for the new engine location.

Erik

_____________________________

"Toy airplanes are for people with more money than sense."
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(in reply to bluehawkbm)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 7:06:22 AM

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From: Anchorage, AK, USA
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Here are my best guesses on getting a .46 AX on the front of a reactor. Apologies for the quality of the images - the firewall image is from the Reactor manual .pdf and is taken at a bit of an oblique angle. The scales of the two images are about as close as I can get using the dimensions on the OS drawing and comparing them against the measurements of the engine mounting template from the Reactor manual. Both images presume the the crankshaft should be centered at the intersection of the index marks on the firewall and I'm not sure that's accurate. No guarantees these are accurate, just my best guess.

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(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 1:24:50 PM

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Damn Tom, that's really cool photoshop skills there! With accurate pics and 3-views, you could take a lot of guess work out of the engine fitment process.

_____________________________

"Toy airplanes are for people with more money than sense."
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(in reply to Tom Simes)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 9:00:02 PM

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Why haven't they upgraded the 225 to Karbonite gears or something yet I wonder...?

Ernie

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 10:26:09 PM

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From: Westerville, OH, USA
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This is gonna be a stupid question but I am working on my elevators and this is the first plane I have ever built with dual elevators. (hell, it's only the second plane I have ever built...) Can someone explain to me how I get the elevators to move together and still keep the push rods all straight and level? Right now I have to have one servo arm pointing up and the other pointing down.

I have a Futaba 7CAP radio but I do not think it supports dual elevators.

Thanks for helping the rookie.

Oh, I am moutning my 2 stroke with the muffler coming out the bottom. I will have to put an extension on the needle valve, and I plane to use a remote glow plug kit, but I am hoping that it will allow me to cut the cowling less.

(in reply to Ernie Misner)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/1/2007 11:45:04 PM

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From: Charlottesville, VA, USA
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quote:

ORIGINAL: Celidon

This is gonna be a stupid question but I am working on my elevators and this is the first plane I have ever built with dual elevators. (hell, it's only the second plane I have ever built...) Can someone explain to me how I get the elevators to move together and still keep the push rods all straight and level? Right now I have to have one servo arm pointing up and the other pointing down.

I have a Futaba 7CAP radio but I do not think it supports dual elevators.

Thanks for helping the rookie.

Oh, I am moutning my 2 stroke with the muffler coming out the bottom. I will have to put an extension on the needle valve, and I plane to use a remote glow plug kit, but I am hoping that it will allow me to cut the cowling less.

That's not a dumb question at all.

Essentially, the servos have to rotate opposite of one another. As far as I know, there are a few options on how to achieve this. Let me preface this by saying I'm no authority on this subject, so make sure you do a bit of research before spending any of your hard-earned cash.

One solution is to purchase a "reversed" servo. I don't know much about this option, but it is probably the one least likely to be used these days. Hitec servos, for instance, can be purchased from Servo City with reverse rotation. Another option is to use and in-line servo reversing device. This looks like a servo extension, but has a bit of circuitry included that reverses the direction of the servo. This is simple and relatively inexpensive, but not really adjustable for throw and centering. A step up from this is what is commonly called a match box. This device also goes between the receiver and servo(s) and includes a bit more circuity that allows you to fine tune throw and centering on the servos. Finally, a lot of modern computerized transmitters have the ability to utilize dual elevator servos. My Hitec Eclipse 7 calls this function "ailevator" but I think there are other names for it as well. You can reverse rotation, alter center points and cotrol end points individually for both servos. Oh, I just thought of another option. Hitec digital servos can be individually programmed by the user with their programmer. I hope this didn't confuse the issue even more.

Do a bit of reading and I'm sure you'll be able to settle on a solution that meets your needs.

Erik

_____________________________

"Toy airplanes are for people with more money than sense."
- My Ex-wife

(in reply to Celidon)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/2/2007 1:26:45 AM

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From: Spruce Pine, NC, USA
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Erik,
That was a good job explaining all of the options for split elevators. Im afraid since Celidon has a Futaba 7 Cap the reversing
y-harness my be his best bet. A friend of my has a 7 CAP and you can program the trasmitter to use 2 seperate channels but the trim didn't work right. He has since upgraded to a 9 CAP which does this function as your Hitech using ailevator or you can just program in a mix on the 9 CAP to get the same result. The 7 CAP is a great transmitter for the money but lacking this one function kills it for me because almost all of my planes use it. I had Futaba's 6EAX before I got my 9 CAP and that was my primary reason to upgrade.
I hope that I am wrong and the 7CAP can be programed for this but my friend never got his working right so he used the reversing y-harness until he upgraded. The only problem he experienced with the reversing y- harness is it got out of adustment pretty often and you had to adjust it with a adjustment screw built into it.

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/2/2007 1:49:40 PM

cmala3

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From: , AL,
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I had the same issue but what I did, temporarily, was to use the mixing in the transmitter that is setup usually for ailerons to run the elevators. Now this means that if I accidentally hit the flap knob on the transmitter, then one of the elevators will move out of position but it allowed me to reverse one of the servos.

My longer term solution is to get a servo reversing Y harness that will connect the two elevator servos together and reverse one of them so that they will move the elevator the same. Doing this means that all your adjustments on elevator position now become manual to sync the elevator halves together. The ailerons aren't that big of a deal because they normally work opposite of each other anyway so if you don't have any mixing, a regular Y harness will work for your ailerons.

Hope this helps.

Craig

(in reply to bluehawkbm)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/5/2007 12:25:50 AM

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Just how "bad" is it really to use one elevator servo on the Ractor? I know I'll get more into this as I find time to begin the build, but what provision do they give you to join the elevator halves?

I'm stepping up from a 4* 40 and a 60 size Ultra Stick, so I'm thinking I would still think it was a great plane...:-) I have the T6XA and am stuck with the above options as well.

Hey, IF I did come up with the bucks for 2 digital mini servos..... any possibility of programming them at the hobby shop rather than having to purchase a programmer?

Thanks,

Ernie

(in reply to cmala3)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/5/2007 1:39:08 AM

cmala3

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From: , AL,
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They don't give you an option in the kit to join the two halves together. They are completely seperate. I guess that you "could" join them together somehow but I wouldn't recommend it.

Just get two servos and get a servo reversing Y harness and you are good.

(in reply to Ernie Misner)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 2/5/2007 5:13:50 AM