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 - 3/3/2007 9:37 PM

malcolmm

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I've finally finished my OS 55 AX power Reactor. It came out a bit heavier than I wished, 5 lbs, 15 oz. I'm using a pretty large battery, 1700 ma nicad, a muffler extension and a couple of my servos are a bit heavy (1.8 oz), so I guess that's where the extra 3 or 4 ounces came from. Also I tend to go heavy on the foam around my receiver and battery - it all adds up.

The only thing I didn't like about the build was carving up the cowl - what a pain. I'm sure it took my 10 hours, partly because I live in an apartment so I don't like to use dremel tools - too much of a mess.

Some people were asking about fitting a 2 stroke into this plane. Hopefully my pictures upload okay, I haven't uploaded files to rcuniverse before.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/3/2007 10:20 PM

3DownLow

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Here's a vid of my E-powered version. Using the stock recommended motor but a 16 x 8 prop. 15 x 7 didn't have what I was looking for. Will try other motors too, but so far it's a great 3D platform. Haven't seen a glow vid yet.
http://www.rcgroups.com/forums/showatt.php?attachmentid=1163484

quote:

ORIGINAL: BoneDoc

Who's got a video of this flying?

< Message edited by 3DownLow -- 3/3/2007 10:21 PM >

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 3:14 AM

rclement

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Wow! Nice video. Thanks for posting.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 8:01 AM

rustypep

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I started working on mine tonight. I got the two wing panels mostly done including the mods to mount the Hitec digital mini's. I did notice when lining up the control horns that they don't seem to extend out over the hinge line if you line the edge of the horn up to the edge of the aileron. Anyone have a similar problem?

< Message edited by rustypep -- 3/4/2007 9:47 PM >

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 6:54 PM

bluehawkbm

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Here's a though for you guys who are going with 2 stroke engines in the reactor. Mount the engine 90 degrees and use a pitts style muffler. I have done this on several models in the past and it looks real nice and don't require cutting up the cowl as much.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 7:05 PM

JustErik

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malcomm,

I think you did a nice job on the cowl. You didn't have any choice but to open it up where the engine required it. And with the 55 AX in there, I doubt you'll notice the few extra ounces. I can't wait to hear a flight report with that engine.

Where did you put the battery in order to get it to balance? Mine had to go behind the canopy (YS .63), so I'm guessing yours is probably a little forward of mine.

Erik

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 11:11 PM

Guillermito

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Hello JustErik, where you bought your battery that law that is of NiMh 6v 720 mAh and single 2.5oz! another question, YS 63 can be installed to 120º, in order to use single the original silencer?

Thank you very much. Greetings.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 12:58 AM

zeng62

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I recieved mine a week or so ago. Looks like an excellent quality airplane, maybe the best quality of an ARF I've seen yet (I've been Flying for 27 years).
Still plan on using one of my Tower 75's. With an airplane such as this I would be careful on running too small a servo, not the torque output but the gear train being able to withstand accidental high speed runs and a bit of flutter. Ailerons seem to be most vaunerable surface.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 1:53 AM

malcolmm

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quote:

ORIGINAL: JustErik

malcomm,

I think you did a nice job on the cowl. You didn't have any choice but to open it up where the engine required it. And with the 55 AX in there, I doubt you'll notice the few extra ounces. I can't wait to hear a flight report with that engine.

Where did you put the battery in order to get it to balance? Mine had to go behind the canopy (YS .63), so I'm guessing yours is probably a little forward of mine.

Erik

Hi Erik

I put my battery just in front of the wing tube. It balanced perfectly, maybe just a tiny bit nose heavy. I'm going to change from a APC plastic prop to a Zinger Pro wood, so that should move the CG back a bit - wood props a quite a bit lighter.

I think you mentioned that the covering was rather strange. The plane looks great, but the quality of the covering material is really questionable. At first I thought it was just the stripes that had the problem of the clear plastic separating from the colour layer, but I've now found all the colours have that problem.

Looking forward to flying this one a lot.

Malcolm

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 1:47 PM

JustErik

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I agree with your assessment of the covering, Malcolm. You almost have to wonder if they are using a different "MonoKote" over in China, which is where I'm assuming these are being built. I've never seen domestically purchased Monokote separate the way this stuff does. I sure hope it holds up.

And thanks for the details on your battery mounting.

Guillermito, I bought my pack at CheapBatteryPacks.com. This was my first purchase with them and their service was great. I bought 2 of the 750 mAh packs for $24.50, shipped. The packs appear to be well constructed and hopefully I'll actually get to use them soon.

Erik

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/6/2007 8:18 PM

Ernie Misner

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Hi Erik, do you have a link to the exact packs you ordered? Also, Lipo, right?, and I've forgotten if you guys need a voltage regulator for those....?

I just went with the 1650mah Hydrimax 4 cell nimh from Tower.

Thanks,

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/6/2007 8:27 PM

JustErik

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Erie,

Here is an excerpt from the invoice they sent me:

QTY Item Price Total
--- -------------------------------------------------------- -------- ---------
2 5C/CBP750AA/Flat/22AWG Wire/Hitec male $ 10.00 $ 20.00

When you go to the site, you essentially build a pack from the ground up. I browsed the available nimh cells and found one with the capacity I wanted (CBP750AA, in this case) and then specified 5 of them be assembled in a flat pack with the 22 gauge wire and a Hitec plug. It's a very slick little system they have and you get to pick all the components at no extra charge.

I haven't messed with lipos as a source of receiver power. I guess I'm old fashioned.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/7/2007 8:15 PM

Ernie Misner

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Erik, that seems like a really reasonable price for TWO of those packs. Are you thinking you'll swap packs instead of maybe charging at the field? Being a 5 cell pack the good news is that you'll get a little more poop and speed to the servos @ 6 volts, but on the other hand the 5 cell packs may actually drain a bit faster. So I wouldn't expect to fly all day without thinking about charging? I sure like your idea about the weight of the AAA packs though. My 4.8v 1650 pack will weigh 4.05 oz. Did you get any weight figure on your 5 cell AAA's?

Thanks,

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/7/2007 8:55 PM

JustErik

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Ernie,

I don't plan on swapping them out, I just needed two of them.

The second one is going in a Kadet LT-25 that I'm building to teach my daughters to fly. I'm hoping to get 3 or 4 flights out of a fully charged pack. If I'll be at the field any longer, I'll just bring another airplane. Gotta give them all a chance to spread their wings, right?

If I remember correctly, the 5 cell pack weighs 2.3 ounces, but I might be off a tenth or two.

Erik

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/11/2007 6:44 AM

Ernie Misner

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That's considerably lighter than my AA pack. Do you have a field charger?

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 1:38 AM

Ralph L.

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Ok, I need some input if you please. I am going to be putting a Tower .61 2 stroke on with a bisson pitts muffler (bolt on) it comes in at 21.5oz. In the wing I am going to use two Tower servos T.S. 35's and the same servo for the rudder. Now for the eleavator I am planning on useing two Futaba 3010s. So can anyone tell me first off is their enough room to mount these full size servos across from one another? Or will they hit each other when they are installed. My next Question is has anyone put a engine up front that weights about the same as mine? If so will two standered servos be enough to balance it all out in the end? Or should I make the rudder servo a standered size also? I have the plane and I am about to order all the servos and stuff and I don't have a lot of $$ to spend at this point so will this set work?

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 8:17 AM

Ernie Misner

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Ralph, they don't have you mount any of the tail servos directly across from each other. Even the mini servos would hit if you tried that.

This threw me for a loop too because it makes the linkage a bit different for the two elevator servos, but apparently that doesn't matter.

I think you'd need all the weight you can get in the tail with that engine. The TS 35's have as much or more torque and speed than most standard servos, so it might not matter much if you used heavier standard servos or added a bit of lead in the tail.

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 1:57 PM

JustErik

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Ralph,

I agree with Ernie. Your power package weighs about the same as the OS. .70 4-stroke, and that engine has already been reported on in this thread by Mark (FNG). His balanced fine with mini servos in the tail and the battery pack just ahead of them. If you go with standards in the tail, you probably wont have to relocate the battery that far aft. That's one of the things I like about this plane; you can outfit it with a wide variety of gear and still end up a good performer. And with that .61, you sure won't have any shortage of power.

By all means, keep us posted on how it comes together for you.

Ernie, no I don't have a field charger. I suppose I could consider getting one, but for the moment, I'd be content just getting the thing maidened. This past weekend was perfect, but life got in the way so it didn't happen.

If the weather holds, I might get it in the air this week. How are you progressing on yours? Got any pics or impressions to share?

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 5:21 PM

FNG

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quote:

ORIGINAL: JustErik

Ralph,

I agree with Ernie. Your power package weighs about the same as the OS. .70 4-stroke, and that engine has already been reported on in this thread by Mark (FNG). His balanced fine with mini servos in the tail and the battery pack just ahead of them. If you go with standards in the tail, you probably wont have to relocate the battery that far aft.

Ralph, I used HS225's all the way around, HS 81 on throttle, a 720 4 cell nihm pack. The batt is just forward of the servo's. I still have lead on the tail, not done playing with the CG yet. I would sure go with 3 full sized servos in tail, that way your bat could go from nose to tail for balance and no added dead weight.

Mark

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 8:27 PM

Ernie Misner

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Mark and others, how are you going about mounting your battery just in front of the tail servos? Are you cutting out one of the openings that are only covered with Monokote, and the putting a patch over that area when finished? Also, how are you holding the battery in back there.

Thanks for any info!

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/12/2007 9:29 PM

bluehawkbm

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Erie, I cut the last hole open in the bottom of the fuselage and stuck the battery through there. The battery was a square pack wrapped in foam. I pushed the battery as far back as it would go and it was snug. I then glued a balsa stick across the former in front of the battery to keep it in place. All that I had to patch the hole with was yellow monocote and was suprised that it looked fine. Barely can tell it. After several flights with some pretty violent snap rolls the battery is staying in place fine. I did ofcourse have to use an extension lead on the battery to get it to the revceiver.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/13/2007 6:43 PM

airracer2004

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I have an evolution .61 with the stock muffler in my reactor. I used hobbico cs-35mg everywhere and my battery is in the back of the access panel area. My engine is mounted at 45 degrees ccw. I only needed 1.5 ounce put in the left tail feather. She flies great!

< Message edited by airracer2004 -- 3/13/2007 6:47 PM >

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/13/2007 7:37 PM

Ernie Misner

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This airplane will be a good test bed for all the Hitec 225 type servos that are being put to use! I'm using the MG (metal gear) type 225's. I've heard that they start developing slop actually before the nylon gear types will. I wonder when this servo will be upgraded to at least having the Karbonite gear train?

Thanks for the battery info Bluehawk. At least I'll know what to do if necessary, but with Saito 82 perhaps that won't be necessary?

Ernie

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/13/2007 10:41 PM

bluehawkbm

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Erie, A friend of mine just finished his reactor last week with a Saito 72 and he had to put the battery in the back of the plane also. He had to put his in front of the former for correct balance where I put mine behind it, but it was still nessecary to cut the hole in the bottom of the plane. As good as ours flies with 70 fourstrokes yours should be awesome with the 82.

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/13/2007 11:31 PM

Ralph L.

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Hey guys thanks for the input on my set up. I have another one for you. Can the saito .65 power this plane with enough power tho hover and pull out?? It is almost the same in power and weight as the o.s. yes.

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