RE: WORLD MODELS 80in. ZERO  
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All Forums >> RC Airplanes >> RC Warbirds and Warplanes >> RE: WORLD MODELS 80in. ZERO
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RE: WORLD MODELS 80in. ZERO - 9/1/2005 5:21:53 PM   
ultraeast


 

Posts: 25
Joined: 1/3/2005
From: , GA, USA
Status: offline 		Richard,
After looking at the pic, it looks like you have way too much weight to get it too balance. I forgot what size engine you are usinug. I have the Mokie 1.80 and I used about a pound on mine and it flys great. I would recheck the balancing point again and I would suggest that you balance it by hand, up right at the CG points that are recommended. Just a thought.

Jerry

(in reply to Richard L.)
       Post #: 126

RE: WORLD MODELS 80in. ZERO - 9/1/2005 7:09:01 PM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		Jerry, I believe my OS 160FX is lighter than your Moki 1.80. I will balance the plane by hand once I cut the cowl and have it mounted. I think it's normal to add 2 lbs of lead up front when using the OS 160.

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Tamiya Panther, Tamiya King Tiger(3), Tamiya Tiger I, HL Tiger(3), HL Panzer III(2), HL Panther, HL Pershing, HL Bulldog, WSN T-34/85, HE Leopard 2A5

(in reply to ultraeast)
       Post #: 127

RE: WORLD MODELS 80in. ZERO - 9/1/2005 7:59:24 PM   
carlbecker



Posts: 1610
Joined: 7/29/2002
From: Fairfax, VA, USA
Status: online 		The OS160 is about 32 ounces. The Moki is about 43 ounces and is quite powerful.

Carl

(in reply to Richard L.)
       Post #: 128

RE: WORLD MODELS 80in. ZERO - 9/1/2005 8:11:52 PM   
ultraeast


 

Posts: 25
Joined: 1/3/2005
From: , GA, USA
Status: offline 		Richard,
You are correct that others have used 2lbs of weight and others have not. I checked the wt of the Mokie 1.80 and it is 41oz = 2.6lbs. I did not have time to check out the wt of the OS 1.60. You are probably correct it is a little lighter. From the vibration of the engine, I do not feel that the sticky back on your weights are going to hold. I would epoxy them in place or strap them also. There is a lot of vibration. Good luck.

Let me know how it flies. I go to a war bird meet SEpt 10 and looking forward to it.

Jerry

(in reply to Richard L.)
       Post #: 129

RE: WORLD MODELS 80in. ZERO - 9/1/2005 8:15:21 PM   
ultraeast


 

Posts: 25
Joined: 1/3/2005
From: , GA, USA
Status: offline 		Carl,
thanks for your help on the OS weight, Richard was correct. My Mokie 1.80 specs sheet say 41oz.

jerry

(in reply to ultraeast)
       Post #: 130

RE: WORLD MODELS 80in. ZERO - 9/1/2005 8:35:09 PM   
seanychen



Posts: 2914
Joined: 7/20/2002
From: Canton, MI, USA
Status: offline 		Rich,

I really don't think you will be happy flying this Zero w/ the OS 160. It's nowhere close to the power to weight ratio you have on most of your other planes, not to mention the whiny sound of OS 160 on Bisson Pitts muffler and the dinky 18" prop (on a 9" cowl) you have to stick on there. If you need 2 lb additional nose weight, no single-cylinder glow engine will fit the bill. I am starting to think that something like a G-62 would be more appropriate. Not trying to be a back-seat taxi driver, as I don't own this Zero. I am sure the OS 160 has enough power to fly this plane, but having seen your videos, you do much more than just flying these warbirds around.

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(in reply to ultraeast)
       Post #: 131

RE: WORLD MODELS 80in. ZERO - 9/1/2005 8:54:55 PM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		seanychen, the plane will haul with either a G38 or a G45. It's a light plane. I'm just going to try the plane out on the OS 160 for a couple of weeks. After that, I'll switch to my Brison 2.4, which is close to 40cc.

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Tamiya Panther, Tamiya King Tiger(3), Tamiya Tiger I, HL Tiger(3), HL Panzer III(2), HL Panther, HL Pershing, HL Bulldog, WSN T-34/85, HE Leopard 2A5

(in reply to seanychen)
       Post #: 132

RE: WORLD MODELS 80in. ZERO - 9/2/2005 4:00:22 AM   
dmyers0403


 

Posts: 342
Joined: 5/30/2002
From: Muldrow, OK, USA
Status: offline 		Yep - I agree with Richard. A 40cc engine is plenty of power. Mine flys with the lower output US41 which has power to spare. A higher end 40cc would add all the extra power anyone should want. I use a 18/10 prop which looks just fine - I will eventually go to a 3 blade prop since I have the extra power to spare. It is a very good kit but I think it is too light for anything larger. Just my thoughts.

< Message edited by dmyers0403 -- 9/2/2005 4:02:17 AM >

(in reply to seanychen)
       Post #: 133

RE: WORLD MODELS 80in. ZERO - 9/2/2005 5:36:14 AM   
p39


 

Posts: 251
Joined: 10/8/2002
From: New Ulm, MN, USA
Status: offline 		I've been flying mine with a Fox 2.4. Great combo... and she seems realstic in the air....

(in reply to dmyers0403)
       Post #: 134

RE: WORLD MODELS 80in. ZERO - 9/2/2005 2:59:21 PM   
carlbecker



Posts: 1610
Joined: 7/29/2002
From: Fairfax, VA, USA
Status: online 		I am going to use the OS 160 in a Platt Zero that should come in at about 18 pounds. From my experience it will have more than enough power for scale flight. I am trying hard to keep the tail light but will probably have to add lead. The WM Zero is close to what I'm building in size and sounds to be a bit lighter. Jeff Foley has built and flown the Platt Zero at 18 pounds using a OS 108. These bigger engines should really not be required at all. From what I have seen from ARF's you should be real careful about stressing the structure, they don't seem to be as strong as a one you build. Be creative at moving items forward and you will be surprised at the results. I got my GP Stearman PT-17 flying at 13 pounds using a older Saito 120 and onboard glow. GP calls for 14-15 pounds and possibly 18 ounces of lead in the nose.

Moki's are incredibly smooth and I probably could have used a Moki 135 in mine but I use 10% nitro and will not carry two different fuels. I thought about a Webra 120 but I'm not sure my skills are good enough to lose that margin of extra power in times of knee knocking.

I currently use Webra, OS, Laser and Saito engines. Fuel would be easier if I just went straight Saito.

Carl

(in reply to p39)
       Post #: 135

RE: WORLD MODELS 80in. ZERO - 9/2/2005 4:38:11 PM   
Ragz



Posts: 1663
Joined: 12/6/2001
From: Nagpur, INDIA
Status: offline 		what servos are you guys using on this plane? Can standard futaba 148 servos be used on elevators (x2) and ailerons?

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Anurag

(in reply to carlbecker)
       Post #: 136

RE: WORLD MODELS 80in. ZERO - 9/2/2005 5:55:54 PM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline 		You might be able to use standard servos on the ailerons, but not on the elevators. This is a giant scale plane, so I would use high torque servos on all channels except throttle and air valve. The control surfaces are huge, and they would require more torque than standard servos could provide.

_____________________________

http://www.WarbirdObsession.com/
Tamiya Panther, Tamiya King Tiger(3), Tamiya Tiger I, HL Tiger(3), HL Panzer III(2), HL Panther, HL Pershing, HL Bulldog, WSN T-34/85, HE Leopard 2A5

(in reply to Ragz)
       Post #: 137

RE: WORLD MODELS 80in. ZERO - 9/2/2005 7:02:05 PM   
carlbecker



Posts: 1610
Joined: 7/29/2002
From: Fairfax, VA, USA
Status: online 		The faster the plane flies the more stress on surfaces will be. I don't have that much experience with these larger birds but I would not go with less than 75 inch ounce. The elevator being larger I would increase this one. I plan to use a 93 inch ounce on the elevator of my Zero and it will not be a speed demon. Throttle and air can be standard.

Carl

(in reply to Richard L.)
       Post #: 138

RE: WORLD MODELS 80in. ZERO - 9/4/2005 5:22:37 AM   
Richard L.



Posts: 8775
Joined: 7/28/2002
From: Redmond, WA, USA
Status: offline
quote:

ORIGINAL: ultraeast

I would recheck the balancing point again and I would suggest that you balance it by hand, up right at the CG points that are recommended.


Jerry, the plane balanced perfectly at 150mm with two pounds of lead up front, according to my fingers. Yes, I do have the stick on weights bolted on with screws.

_____________________________

http://www.WarbirdObsession.com/
Tamiya Panther, Tamiya King Tiger(3), Tamiya Tiger I, HL Tiger(3), HL Panzer III(2), HL Panther, HL Pershing, HL Bulldog, WSN T-34/85, HE Leopard 2A5

(in reply to ultraeast)
       Post #: 139