RE: New Giant GP Super Sportster!!!!!  
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All Forums >> RC Airplanes >> ARF or RTF >> RE: New Giant GP Super Sportster!!!!!
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RE: New Giant GP Super Sportster!!!!! - 3/23/2008 10:09:01 PM   
jben


 

Posts: 63
Joined: 8/31/2002
From: Waldorf, MD, USA
Status: offline 		Steve,

Have you flown your GSS yet?

James

_____________________________

"It's better to have it and not need it, than need it and not have it."

(in reply to SBrian)
       Post #: 426

RE: New Giant GP Super Sportster!!!!! - 3/24/2008 3:57:38 PM   
SBrian



Posts: 65
Joined: 4/14/2006
From: Bedford, NH, USA
Status: offline 		Not yet! Still snow on the ground here in NH.

(in reply to jben)
       Post #: 427

RE: New Giant GP Super Sportster!!!!! - 3/24/2008 5:27:40 PM   
jben


 

Posts: 63
Joined: 8/31/2002
From: Waldorf, MD, USA
Status: offline 		Steve,

I haven't been able to work much on mr GSS, but I did finish my Landing gear, except for wheel pants. I used a Hanger 9 CAP 232 gear 25%, but I did have to cut it in the center. Pictures forthcoming. The Fuji 34 is installed on the firewall, now all I have to do is make the cut-outs for the carborator and muffler in the cowl. I will send pictures when finished. I haven't even started with the assembly of the airplane, I like to get the modifications out of the way first. I went out flying yesterday, weather is getting better here.

James

< Message edited by jben -- 3/24/2008 10:55:37 PM >

_____________________________

"It's better to have it and not need it, than need it and not have it."

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       Post #: 428

RE: New Giant GP Super Sportster!!!!! - 3/24/2008 8:52:04 PM   
bhorton


 

Posts: 32
Joined: 2/19/2003
From: Corinth, MS, USA
Status: offline 		SBrian, thanks for the pics. I don't know why I thought you put a 35GT in the plane. I have been checking the size of the 35GT vs the Moki 180. I think the 35GT is almost 1" wider than the Moki so it would require a large cowl cutout for the muffler. The 35GT weighs 52.8 oz + the muffler so it is about 12oz heavier than the Moki. How did your plane balance? Did it need any weight added to the nose or tail? Please post some rpm figures for the Moki.

(in reply to SBrian)
       Post #: 429

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:24:47 PM   
jben


 

Posts: 63
Joined: 8/31/2002
From: Waldorf, MD, USA
Status: offline 		As promised, here is the first pictures of how I converted my GSS to fuselage mounted landing gear.

James

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_____________________________

"It's better to have it and not need it, than need it and not have it."

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       Post #: 430

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:29:21 PM   
SBrian



Posts: 65
Joined: 4/14/2006
From: Bedford, NH, USA
Status: offline 		I'll confirm the size again, but I was sure they were very close in size.

I added about 4oz of weight to the tail to offset the heavier gears on the front and about a 1/4 of an oz the right wing. As far as the motor goes it is turning out to be a Monster. I'm just start to zero in on the settings, Timing, throttle, carb settings... Today I start getting some great results using an Evolution 18x6 prop. Here is what got so far.

Static thrust 18lbs
Idle 1800 to 2100 RPM
Full throttle 12000 to 13000 RPM ? More prop required for future tests. Max RPM is supposed to be 11000. I am to understand that this motor requires about 5 gal of fuel to break in the sun of a gun… Scary!

Most interesting thing is the throttle response. 2000 to 12000 RPM in the blink of an eye well ok two blinks.


Steve

(in reply to bhorton)
       Post #: 431

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:29:37 PM   
jben


 

Posts: 63
Joined: 8/31/2002
From: Waldorf, MD, USA
Status: offline 		And some more.

James

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_____________________________

"It's better to have it and not need it, than need it and not have it."

(in reply to jben)
       Post #: 432

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:32:25 PM   
SBrian



Posts: 65
Joined: 4/14/2006
From: Bedford, NH, USA
Status: offline 		Nice job! Very professional...

(in reply to jben)
       Post #: 433

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:35:52 PM   
jben


 

Posts: 63
Joined: 8/31/2002
From: Waldorf, MD, USA
Status: offline 		Steve,

Thank you, I see that you are online, I will post pictures of the engine as soon as I make the cutouts in the cowl.

James

_____________________________

"It's better to have it and not need it, than need it and not have it."

(in reply to SBrian)
       Post #: 434

RE: New Giant GP Super Sportster!!!!! - 3/25/2008 9:45:19 PM   
fireman7875


 

Posts: 639
Joined: 2/26/2002
From: Durham, NC, USA
Status: offline 		Nice work! You essentially did the same thing that I did except yours is much prettier!

Brian

(in reply to jben)
       Post #: 435

RE: New Giant GP Super Sportster!!!!! - 3/26/2008 4:55:32 AM   
yyyh412


 

Posts: 12
Joined: 7/15/2006
From: Monterey, CA, USA
Status: offline
quote:

ORIGINAL: fireman7875


quote:

ORIGINAL: yyyh412


She's tried to kill herself 3 times now...
users
Thank for the help





Yeah, I had a suicidal airplane once too! It can be quite maddening.

Brian


Well, I heard from someone else that's having the same issues with their GSS + Fuji 32B. The vibration is still bad. went to the MG servo's and at least the gears are holding up (But they are going sloppy fast) and this weekend lost another clevis in flight. My wife says "ground it" till I can find out whats up with this. Since I now have two other folks having the same issues as me. So if anyone else is out there having very bad vibration issues with this combo, please drop me a line.

~johnny

(in reply to fireman7875)
       Post #: 436

RE: New Giant GP Super Sportster!!!!! - 3/26/2008 3:47:53 PM   
SBrian



Posts: 65
Joined: 4/14/2006
From: Bedford, NH, USA
Status: offline 		John, are you having vibration through the whole power range or just at a specific RPM?

(in reply to yyyh412)
       Post #: 437

RE: New Giant GP Super Sportster!!!!! - 3/26/2008 4:03:27 PM   
yyyh412


 

Posts: 12
Joined: 7/15/2006
From: Monterey, CA, USA
Status: offline
quote:

ORIGINAL: SBrian

John, are you having vibration through the whole power range or just at a specific RPM?


Just a specific range. Its some kind of harmonic resonance in the wings. Mostly on one side. I might try to add a few small sections of material to the fuse saddle and see if that helps.

Tried different props, or no spinner, didn't help

(in reply to SBrian)
       Post #: 438

RE: New Giant GP Super Sportster!!!!! -