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 9:37:05 PM

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Joined: 3/9/2003
From: Vancouver, BC, CANADA
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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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(in reply to RobertC)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/3/2007 10:20:48 PM

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From: 3DWorld, FL, USA
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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 10:21:38 PM >

(in reply to BoneDoc)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 3:14:15 AM

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From: Auburn, WA, USA
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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 8:01:26 AM

Posts: 383
Joined: 9/12/2004
From: Powell, OH, USA
Status: online

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 9:47:13 PM >

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RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 6:54:39 PM

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From: Spruce Pine, NC, USA
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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.

(in reply to rustypep)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/4/2007 7:05:15 PM

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From: Charlottesville, VA, USA
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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 11:11:23 PM

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From: -, ARGENTINA
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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.

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 12:58:08 AM

zeng62

Posts: 85
Joined: 3/8/2004
From: Durand, MI, USA
Status: offline

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.

(in reply to Guillermito)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 1:53:57 AM

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From: Vancouver, BC, CANADA
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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

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/5/2007 1:47:08 PM

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Joined: 7/19/2006
From: Charlottesville, VA, USA
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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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(in reply to malcolmm)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/6/2007 8:18:07 PM

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From: Tacoma, WA, USA
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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

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/6/2007 8:27:26 PM

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From: Charlottesville, VA, USA
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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 8:15:09 PM

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From: Tacoma, WA, USA
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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

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 3/7/2007 8:55:10 PM

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From: Charlottesville, VA, USA
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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 6:44:54 AM

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From: Tacoma, WA, USA
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That's considerably lighter than my AA pack. Do you have a field charger?

Ernie

(in reply to JustErik)