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

RE: Great Planes Reactor GP/EP 3D ARF .46-.70
View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: none

Printable Version

All Forums >> RC Airplanes >> 3D Flying! >> RE: Great Planes Reactor GP/EP 3D ARF .46-.70

Page: << < prev 22 23 [24] 25 26 27 28 29 30 31 next > >>

Login

Message

<< Older Topic Newer Topic >>

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 5:13:53 AM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

what about a pumpo that tank seems a long ways away for my saito.....

(in reply to rclement)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 1:24:13 PM

Posts: 2516
Joined: 3/24/2004
From: Auburn, WA, USA
Status: offline

I just put the tank into the front of the fuse right behind the bulkhead and it fit just fine. I have noticed though that the tank is higher than the carb and while it didn't flood the engine I still wondered if it was effecting how the engine runs.

_____________________________

Any government, that''s big enough to give you what you want, is big enough to take what you have.

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 7:13:13 PM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

So there is two differnt locations for the tank, you can mount it forward or over the wing tube??? I just need to buy the plane and find ouit for myself

(in reply to rclement)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 7:20:01 PM

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

quote:

ORIGINAL: mikejr718

So there is two differnt locations for the tank, you can mount it forward or over the wing tube??? I just need to buy the plane and find ouit for myself

Mike, I don't know if there is more than one "official" location for the tank. The stock location is immediately behind the firewall, just like in most sport ships. In my case, however, I suspended it under the wing tube to minimize CG shift during flight and get some weight out of the nose as I had read the plane tended to be nose heavy. Using a YS .63, the remote tank location was not an issue. Without it, I'd personally recommend a Cline or Iron Bay regulator. These can be used on 2- or 4-stroke engines and in my experience, they are a reliable and effective means of getting fuel to the engine from a remote location.

Erik

_____________________________

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

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 8:35:07 PM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

oh, Ok that clears that up do you think that it will balance out fine with a saito 82 and the tank in the stock location?

I will use 9650s on the elevators and a 9451 (full size sevo metal geared) On the rudder. I will probably snag some more 9650s on the ailerons too.

Are those really eneough servo for this plane and a saito 82s thrust?? ( I am sure they are though...)

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/6/2007 9:15:20 PM

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

I'm guessing you'll probably have to add a bit of weight to the tail or perhaps build a hatch and put your RX battery back near the horizontal stab. I don't recall who did it, but if you poke around a bit in this thread, I'm sure you can find it. As far as the servos, I'm sure the 9650s are fine for the elevator halves and ailerons, but since you'll probably need some weight in the tail, why not go with a meatier rudder servo. If I had it to do over, that's probably what I'd do.

_____________________________

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

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/7/2007 4:50:56 AM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

ok cool, I am going on the right track...I will have to see if I can find the hatch setup...

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/7/2007 5:40:23 PM

Posts: 193
Joined: 1/13/2003
From: Barrie, ON, CANADA
Status: offline

So many choices.

Haven't maidened yet. Still confirming the CG and hoping the graphtec landing gear arrives soon.
The manual says CG should be at 4 3/4" or 121mm which happens to be right at the wing bar. Another thread some are saying CG should be back as far as 5 1/4".

For those who have flown theirs, is the manual correct? Just thinking out load but JustErik is that why you may have needed the change in thrust line?

My recommendation to all is go with the YS 63 or the Saito 82. More power less weight than the recommended engines.

On mine with the 82 I added no dead weight in the tail.
I have the Hitec 5625 for the rudder in a pull pull. The servo is in the same place that the rudder was intended just horizotally. I also added the Dubro pull pull tail wheel and instead of the supplied metal control rods for the elevators I still had some graphite rods ready for use.
My larger tank is under the wing bar and Battery is strapped down just in front of the bar for a 121mm CG.
I didn't put a pump in. I recently found that a 2 oz header tank works just fine on my Saitos even when drawing fuel from the main tank 12" away (I.e. measured from the carb to the back of the tank for vertical flight).
I discovered Saitos fuel draw ability when my muffler broke off in flight (failed at the 90 exhaust joint). I was still flying vertical 3D after I heard the change in engine tone and only realized 6 min later the cause when I landed noting the muffler dangling from the pressure hose.

I'm still waiting on the lighter Graphtec landing gear but I figure I'll need to move the battery forward when I added them unless the CG should be further back.

I did all this and the weight still came out (with the factor gear) at 6 lbs 1 oz. Thats the same as the max recommended factory weight.

Did I say I luv this plane!

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/7/2007 7:10:44 PM

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

Max,

I haven't made any thrust line adjustments. I'm still a bit nose heavy, I just haven't had much opportunity to dial it in lately. What little time I do get to myself is usually spent on non-hobby activities.

The header tank sounds like a simple, inexpensive and effective solution. I wonder why no one thought of it sooner?

When I first finished up my Reactor, the all up weight was 5 lbs 10 ounces. Since then, I've removed the cowl (until I get the YS properly tuned), removed the wheel pants (bumpy grass field + wheel pants = no joy), and switched to the Graphtec gear. Right now it's 5 lbs 6 ounces, but after I reinstall the cowl, I think it will be right at 5.5 pounds, which might still be a little heavy for all out, balls-to-the-wall 3D, but it should be fine for a hack like me.

_____________________________

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

(in reply to MaxThrottle)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/8/2007 5:22:35 AM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

thats where I am planning to be at total.... Have to get the saito sunning good before i put on the cowel too...... so my confiremed setup right now is

9650s on the elevator
9451 on the rudder
JR DS811s on ailerons
Saito 82
Stock tank location
Spektrum DX7 and AR7000
5 cell 1650mah Ni-Mh reciever pack
and a ....voltwatch...

(in reply to JustErik)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/10/2007 4:26:18 PM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

welll just finished uo the reactor, I dont know what you guys were talking about with the cg issues and the weight too...

I used the above setup but I put the ds811s on the elevator and the 9451 on the rudder. AUW is 5.3lbs or 5lbs 5 oz..... My cg ended up about 5in back.....

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/12/2007 8:08:18 PM

Posts: 1
Joined: 5/16/2007
From: Morgan Hill, CA, USA
Status: offline

I have a reactor set up with an older OS 70 surpass. I use the stock location, plastic spinner and found the planes balances perfectly with a 6v battery mounted to a long wooden plate shoved all the way donw the fuselage so that the battery touches the rear servos. I am currently using the Hitec miniservos in the tail but I do recommends standard size in the rear and MG for aileron. Power is good-unlimited vertical at 60% throttle and a 13-5 prop.

Hope this helps,

(in reply to bluehawkbm)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/12/2007 11:00:49 PM

Posts: 193
Joined: 1/13/2003
From: Barrie, ON, CANADA
Status: offline

mikejr718

Great to hear it but I'm not trying to acheive the lightest plane. The wing area gives a lot of flexibility. Putting the lighter .82 in allows me an extra 4 oz or more of fuel. I've also put heavier but faster higher torque MG servos which adds up but saves me having stripped servos later.

I also prefer longer flying times and a non shifting CG if it only costs a few extra ozs. The 82 and the wing area can easily pull this. My experience has been I can match the manuevers of others but while they are refueling I'm still up there having fun. So I don't mind my girl a few ozs chubby.

You mentioned you have the CG at 5". the book says 4 3/4 while others have taken it back to 5 1/2" in response to your "I dont know what you guys were talking about with the cg issues and the weight too... ".
Its not an issue just a queestion about what some are finding is better.

Either way it tells me I've got room to play with weight. In fact I'm not sure why some have to balance the plane by putting the battery in the tail. My tanks and battery are ahead of CG while still being within the weight limit. It's surprising that the some are moving their batteries so far back.

Mike is your landing gear facing forward or back and is it the stock gear or the Graphtec?

(in reply to mikejr718)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/12/2007 11:39:03 PM

Posts: 62
Joined: 9/25/2006
From: Bennington, NE, USA
Status: offline

facing back and its the stock gear very flimsy but I like it makes for very gentle landings... I fly off a asphalt runway at Omaha's hawk Field

(in reply to MaxThrottle)

RE: Great Planes Reactor GP/EP 3D ARF .46-.70 - 8/13/2007 4:43:36 AM

Posts: 193
Joined: 1/13/2003
From: Barrie, ON, CANADA
Status: offline

I still like the landing gear design (GPs or Graphtecs) since it allows for flex. A simple shock absorber. But the stock gear in tall grass; I had to full up elevator at times to stop it from nosing over and thats with CG at 4 3/4".

I planned on moving it back but for now I'm grounded.

Something got into my 82 exhaust valve that caused a notable change in compression. I pulled the head apart and confirmed something got in there scratched the valves.

I ordered a new head and valves but my sister in law who was supposed to bring them is holding them hostage State side until I pay for sending my wife home to visit. Talk about hostage situation. There was the usual exchange of words but I'm probably grounded for weeks unless I get a new engine which means staying home with a very unhappy wife.
Its better to send her to keep the peace but I could have bought a new engine for less.

Sorry I know I'm off topic but this is theropy at this point. Is there a thread for when our spouses put themselves between us and our hobby?

. Marriage couselling???