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

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Old 02-12-2007, 02:17 PM
  #176
Ernie Misner
 
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Bluehawk, on your 2nd clunk that is for filling/unfilling, do you run that to a fuel Dot, plug it up, or?

Thanks,

Ernie
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Old 02-12-2007, 04:29 PM
  #177
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Ernie,
The Reactor kit came with a plug for this very purpose. Just let the fill line hang down out of the cowl a bit and use the plug. If you dont have the plug that came with the kit you can us a small bolt or a piece of brass tubing with one end soldered shut. If you want to get fancy a fuel dot is fine too.
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Old 02-12-2007, 04:41 PM
  #178
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Guys I was able to get 4 flights in on my Reactor sunday. This is great flying little plane. It does a great slow knife edge and mine does'nt require any elevator or aileron to keep it straight. On high rates the roll rate is pretty fast. It is stable in a hover. So far I am pleased. The landing gear modification that I mentioned in a previous post worked perfect. Now the plane doesn't want to tip on its nose so easy. I'm even every very pleased with the little Magnum 70. This motor surprised me. So far it has run great and reliable and has enough power for 3d flight. Hobby Lobby has these engines on sale for 129 dollars now. Anyone wanting a four stroke on their Reactor and save a bunch of money over a Saito, OS or YS should consider this motor even though it is a little heavier that some. I still managed to get the plane to balance without adding any weight by putting the battery in the tail.
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Old 02-12-2007, 04:58 PM
  #179
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Wow, great report. It seems like the Magnum 70 should be a bit lighter than a Saito 82...? Even more tail weight for the Saito 82 guys?

I think it's Hobby People that sells the Magnums.

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Ernie
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Old 02-12-2007, 05:01 PM
  #180
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

I got a chance to fly mine this sunday and its great. I reversed the landing gear to prevent a nose over and added take off flaps that works great. I did manage to strip an aileron servo during one of the flights. I did not notice it until the next time I fueled the plane. Got some metal gears on order for the HS 225.
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Old 02-12-2007, 08:02 PM
  #181
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

The Magnum 70 weighs in right at 21oz. and the Saito 82 weighs in at 17.6oz. (Both weights with mufflers.).

For an all out lightweight 3D'ing 4 stroker, the 82 is king but, the Magnum is no slouch in the power department, turning an APC 14-4W at 10K RPM's on 15% Cool Power. It's just a little heavier and a whole lot cheaper.... It's a good value and all 3 of my 70's run great but,,,, so do my Saito's...
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Old 02-12-2007, 08:07 PM
  #182
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Sorry for the mistake guys it is Hobby People that has the magnum 70 for $129. Ernie the Saito 82 while having more displacement is
lighter than the Magnum 70. I have both engines. Saito is the power to weight ratio king. The Saito 82 will require less effort to get the plane to balance and have ballistic power on this plane. Howerver the Magnmum is half the price of the Saito. I already had the Magnum 70 so that is what I used and it flys the plane great. The Saito would be even better if you want to spend the extra money.
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Old 02-12-2007, 09:20 PM
  #183
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

OK, all you guys who are flying yours rigth now SUCK[>:] I am expecting 8+ inches of snow in the next 24 hours...

I had to go with an 8 ounce replacement tank. Any idea how much that two ounces will shorten my runs?

Also, post some pics with the landing gear reversed. I want to see how it looks before I consider doing it.
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Old 02-13-2007, 11:00 AM
  #184
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Guys since everyone is seeming to have a problem with the landing gear being to far rearward I decided to post some pics of the mods I made to mine. As you can see it does't look very different. It is just rotated forward enough to keep the plane from nosing over. It requires drilling new outside holes in the gear and some slight grinding of the slot in the fusealage for the needed clearance to rotate the gear forward. You then want to bent out the toe in of the gear. All of this is very simple and easy. Some have mentioned turning the gear facing the other way. I have tried this and I didn't think it looked too great. Also the plane didnt want to come off the ground in this configuration. Stealdesk did mentioned he used flaps to get the plane airborn which is a good idea but I would rather go with my mod. Hope this helps
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Old 02-13-2007, 12:05 PM
  #185
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Looks good. Simple but functional. I first thought from the picture that you slotted the holes in the gear but then I re-read your text and you drilled new holes which is good.

Just so you know, when flying off of a paved runway, I don't have any tipping problems with the stock landing gear in the stock location with the stock wheels and pants.
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Old 02-13-2007, 01:16 PM
  #186
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

cmala3,

A paved runway sure is nice. I used to get to fly at our local airport which is only 5 minutes from my home until the airport commission ran us off. Now I have to drive for 45 minutes to another field which is a turf farm and man you have unlimited room. Also the grass is a little more forgiving on those not so perfect landings. Grass is much less abrasive than pavement. If I had my choice though I like the paved runway. Glad to here that your plane didn't require any modification. Happy flying.
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Old 02-13-2007, 01:20 PM
  #187
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Who all is flying off grass? Our field is grass and I am wondering if the pants are goibg to be a problem.

By the way, we got 7 inches of snow and more on the way... BRRRRRRRRRR....
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Old 02-13-2007, 02:08 PM
  #188
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

I'm on grass and am prepared to ditch the pants if necessary. In fact, I EXPECT to ditch them soon after the first few flights. I've never had a pair last on our field. However, that's an ounce or so that can be shaved, so I guess it won't bother me too much.
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Old 02-13-2007, 02:24 PM
  #189
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Speaking of ounces, Bluehawk, is that a simple plastic spinner you are using? Do the nice Tru Turn type add a lot of extra nose weight? What are my options do ya think with my Saito 82? So far I've just use polished alum spinner nuts with my 82 on sport planes.

Thanks,

Ernie
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Old 02-13-2007, 03:21 PM
  #190
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Ernie, I'm running OS 70 surpass on mine witch is a good 4 oz more than you Satio. With a Satio 82 I'm guessing you'd run an APC 14x4W, or maybe a 15x4w prop. See the link for a Tru turn spinner cut for wide props.

2.25" Spinner for the Saito 82 for use with wide props

http://www.truturn.com/cgi-bin/store...exact_match=on

Adapter for the Saito 82

http://www.truturn.com/cgi-bin/store...dapt0717a0716a


It states the weight of 1.73oz for this spinner, plus the adapter of 1.13oz = 2.86oz.

Due to the weight and the cost of the polished aluminum spinner, I used the supplied spinner and cut the blade relief further to allow the use of my APC 14x4W prop.

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Old 02-13-2007, 04:14 PM
  #191
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Wow! Nice picture! [X(] Nice looking plane! Just when you think you have a good set of planes they come out with a new one that looks better and looks like it would fly good. Wow!
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Old 02-13-2007, 04:19 PM
  #192
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Thanks FNG. I notice you sent me to the Tru Turn page. Does Tower or anyone else have a better deal on them?

Thanks,

Ernie (Hi Rob!)
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Old 02-13-2007, 05:33 PM
  #193
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Ernie, The spinner shown in the photos of my plane is the spinner that came with the kit.I cut it to fit the prop as FNG did. You definately want to run some type of spinner on this plane or it just won't look good. The aluminum spinners are nice and in the long run a good value because they are not prone to crack like the nylon ones do. Tower Hobbies carries Great Planes 2 1/4 aluminum spinner for $15.99 plus you will need an adapter or $4.49. The GP nylon 2 1/4 is $4.71 and a Dubro is $5.19. I'm not sure about the weight difference but it won't be alot. If you are going to use the Saito 82 which is quite a bit lighter than my Magnum 70 you will be fine to go with the aluminum. I have a Saito 82 on my ModelTech Magic Formula 3D and I bet I have went through 5 or 6 nylon spinners. If I would have went with an aluminum to start with I would have saved money.
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Old 02-13-2007, 06:37 PM
  #194
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Magnum makes a reasonable polished good looking spinner, but again they are all an with wide props. I sure you could trim them, but at the price I not sure I take it on.

http://www.hobbypeople.net/gallery/237153.asp


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Old 02-13-2007, 08:30 PM
  #195
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Trimming a aluminum spinner for a wide blade prop isnt to big a job as long as you have a dremel tool. Just try to trim both sides as close a possible to match so the spinner stays in balance. You can rough cut it out with a cut off wheel and smooth it up with the drum sanding wheel. I had to trim a Dave Brown 4 inch aluminum spinnner that goes on my WildHare Extra 300 with a DA 50 and it wasnt to difficult.
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Old 02-14-2007, 02:45 PM
  #196
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Great spinner info guys. Thanks loads! Are the Tru Turns sold mainly from the dealer though?

Looking at that Hobby People page brought up a Cirrus servo. I've been amazed at the specs on those guys for some time now. I wonder if they are really rated properly....

Ernie
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Old 02-14-2007, 10:08 PM
  #197
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

I am flying off of petromat tarp. Smooth like a paved runway but very forgiving.
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Old 02-15-2007, 05:25 PM
  #198
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

OK, I am feeling dumb as a rock at this point. I can't get the travel on the two sides of my elevator to equal out. What am I missing here? I understand that one servo is farther back than the other, but what is the trick here?

Thanks
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Old 02-15-2007, 07:00 PM
  #199
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Are you using a Y cord? I'm reading with interest because that is what I will be doing too.

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Old 02-15-2007, 08:40 PM
  #200
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Default RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Celidon, I don't think you will get your elevators to match the way yours is set up. Each servo is pushing at seriously different angles.
This setup will work if the servos are mounted with the servo with the horn facing down is higher than the opposite servo with the horn facing up, so that both elevator halfs are being pushed from the same angle. You want this to be as straight a possible. My funtana 90 had extra holes for the servos to mount in this configuration. One higher than the other. I set the Funtana up this way because at the time I didn't have my 9CAP. You will either have to use the reversing y-harness or cut new holes in the plane to mount the servos. Hope this helps and I havent just confused you.
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