RE: New Giant GP Super Sportster!!!!!  
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RE: New Giant GP Super Sportster!!!!! - 7/14/2006 12:05:21 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline 		Flight report

SuperTiger 3250 1.98 cu
Inverted Slimline Pitts
18-10 prop
wildcat 10 percent

2 clicks down 2 clicks right ail 2 clicks right rud

3 flights and I love it. First big plane and I'm not going back to small stuff. Motor has ample power and for $179.00 you cant hardly beat it. I did the math and It would take 117 flights to break even on the cost of a gas engine ( thats old math and based on the cost of a DA-50, so maybe 80 flights on a Fuji) Anyway, Recommended throws were right on, the only thing I might change would be more low rate rudder, but only for better ground handling. Neutral ail knife edge, pulled ever so slightly to the belly, only made roll to the right, didn't try knife edge on left roll. Snaps were clean and predictable. Landings were a bit fast and elevator sensitive. Will add a bit of tail weight and a bit more expo for next flights. (even though knife edge would indicate less tail weight, I can fine tune that latter with ail diff) Vertical unlimited at 3/4 throttle

No complaints at all

Bill




(in reply to ckangaroo70)
       Post #: 26

RE: New Giant GP Super Sportster!!!!! - 7/15/2006 3:15:55 PM   
Blueyonder


 

Posts: 73
Joined: 1/22/2002
From: Denver, CO, USA
Status: offline 		Bill, thanks for the report. I've always loved the Sporster. Any photos??

Would the OS 160fx be enough engine for this bird? I assume it would be....
I happen to have one needing a home.

Joe

(in reply to biplane bill)
       Post #: 27

RE: New Giant GP Super Sportster!!!!! - 7/15/2006 8:35:24 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline 		os 160 would be enough. Ive always liked my stuff a little overpowered though. Think Ill hook up smoke on it. makes hugh loops!!. No pictures yet. Going on vacation tommorrow, try to hit you with some next week.

Bill

(in reply to Blueyonder)
       Post #: 28

RE: New Giant GP Super Sportster!!!!! - 7/16/2006 4:10:01 AM   
gary41



Posts: 50
Joined: 3/5/2002
From: Huntsville, AL, USA
Status: offline 		I received my Giant SS a few days ago, and the quality and fit of the contents is outstanding! It looks like GP has done a really thorough job of selecting and working with the Chinese factory. Let's hope the quality doesnot degrade. The only complaint I have is the Monokote..the workmanship in its application was very good, however those darn wrinkles just keep comming back within 16 to 20 hours after I follow the instructions in the manual on removing them. Has anyone got a good solution to this problem?
(Other than removing the Monokote and replacing it with Ultracote) The covering looked nearly wrinke free when I opened the box. The plane has not even been out of my workshop, yet. Temperture in shop is about 75 F.

Power for the SS will be my Fuji 32, so I am sue I'll be adding tail weight!

_____________________________

Gary Taber

(in reply to biplane bill)
       Post #: 29

RE: New Giant GP Super Sportster!!!!! - 7/16/2006 8:04:58 PM   
mnrcaerobat


 

Posts: 1111
Joined: 10/24/2003
From: Minnetonka, MN, USA
Status: offline
quote:

ORIGINAL: gary41

I received my Giant SS a few days ago, and the quality and fit of the contents is outstanding! It looks like GP has done a really thorough job of selecting and working with the Chinese factory. Let's hope the quality doesnot degrade. The only complaint I have is the Monokote..the workmanship in its application was very good, however those darn wrinkles just keep comming back within 16 to 20 hours after I follow the instructions in the manual on removing them. Has anyone got a good solution to this problem?
(Other than removing the Monokote and replacing it with Ultracote) The covering looked nearly wrinke free when I opened the box. The plane has not even been out of my workshop, yet. Temperture in shop is about 75 F.

Power for the SS will be my Fuji 32, so I am sue I'll be adding tail weight!


I have had better luck removing wrinkles on my arf's with an iron. They seem to come back for me when using a heat gun? Which are you doing?

_____________________________

Brian

(in reply to gary41)
       Post #: 30

RE: New Giant GP Super Sportster!!!!! - 7/16/2006 10:41:20 PM   
gary41



Posts: 50
Joined: 3/5/2002
From: Huntsville, AL, USA
Status: offline 		Used a heat gun the first time, 2nd time I used my Hangar 9 Iron set at 350...the last time, I set the iron at 380...seems to have worked-so far!

Thanks for the reply

_____________________________

Gary Taber

(in reply to mnrcaerobat)
       Post #: 31

RE: New Giant GP Super Sportster!!!!! - 7/21/2006 12:23:53 PM   
frabru


 

Posts: 17
Joined: 7/2/2006
From: Altadena, CA, USA
Status: offline 		I just received my Giant Supersporster and it look good. I was considering either a BCMA or Brillelli 40, however, from what I've been told by both of the above engine suppliers, I will have to cut the cowl for clearence for the muffler. It appears it will be a pretty big hole and I really don't want to do it. Is there any other engine that will fot withour cutting a big hole in the cowl. Although I want to try gas, the Magnum 1.80 4 stroke looks interesting.

any feedback will be appriciated.

(in reply to gary41)
       Post #: 32

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 4:04:23 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline 		Crash Report

8th flight started uneventful. Motor started 1st flip, a little warm up and off we go. Couple low passes, Cuban 8, inverted pass, immalman (sp) and POW horizonal stab self destucts on the down line. Wasn't even pulling elevator and off power. (I know you don't believe, but had witness) Both sides failed in the same place. Was able to make somewhat level knife edge but no directional control, so into the woods it went. Found it 20 feet in a tree. Made comment to helper that prop wasn't even broke. I climbed the tree, knocked the plane down, and broke the prop. Just added insult to injury. Oh well Hobby services says they are going to replace. Still love the plane, flys out of this world.



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(in reply to frabru)
       Post #: 33

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 5:09:18 PM   
jrf


 

Posts: 2335
Joined: 12/30/2001
From: Burbank, CA, USA
Status: offline 		That is the result of elevator flutter. Super Sportsters are particularly prone to it. On the next one, make sure your control systems have the proper mechanical advantage and are slop free. Seal the hinge gaps and set your ATV at 100% or more at the recommended travels.

The first prototype Super Sportster 90/120 lost it's tail twice from the same problem. (That was in the days of plastic pushrods.) They initially recommended that you use lead weights to balance the elevators, but the final solution was to move the hinge line back 1/2" to make the elevators smaller and use solid steel pushrods.

Jim

(in reply to biplane bill)
       Post #: 34

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 5:53:18 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline

Yes, I'd buy off on that explanation. This is my first "BIG" plane. The only place I didn't go along with the instructions to a T was that I put higher torque rated servos on everything. Everything was aligned properly, all controls were 90 degrees, used the included push rods. Control horns were right on the hinge line. All travels were set per the book and was flying on low rates. I didn't seal hinge gaps. Not sure what you mean by !QUOT!ATV!QUOT! There was no slop in the setup.


Thanks for advise
Bill

(in reply to jrf)
       Post #: 35

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 6:10:34 PM   
jrf


 

Posts: 2335
Joined: 12/30/2001
From: Burbank, CA, USA
Status: offline 		ATV = EPA Transmitter adjustment of servo travel. Setting up the linkages for higher travel and then turning it down by using ATV/EPA instead of reducing the travel mechanically (by moving the pushrod in on the servo arm) reduces servo torque available to the control surface, reduces servo resolution at the control surface, and increases free-play around center. ATV/EPA should be set at 100% or higher wherever possible.

Dual rates have the same effect, so the worst case is having ATV/EPA set at something like 50% and then using a 50% low rate. Your 100 oz. servo would be delivering less force to the control surface than a 25 oz. mini servo that was set up for proper mechanical advantage. Not to mention, much worse resolution and four or five times the centering slop.

Jim

< Message edited by jrf -- 8/4/2006 6:24:20 PM >

(in reply to biplane bill)
       Post #: 36

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 6:45:01 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline 		Just so I understand what you are saying: You want max movement from servo from given input accomplished by moving linkange IN on the servo arm and using the farthest hole out on the control horn. This radio runs up to 140%. So if I read what you are saying corectly: 1. mechanical adjust to achive close to 140% or stick with 100% ? on high rates with proper throw, and then 2. Dial down on the radio to achive low rates?


Thanks for the advise

Bill

(in reply to jrf)
       Post #: 37

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 8:05:20 PM   
jrf


 

Posts: 2335
Joined: 12/30/2001
From: Burbank, CA, USA
Status: offline 		Essentially, yes. But because the servo moves in a rotary pattern, 140% doesn't give a lot more linear movement to the pushrod than 100% and you wind up with reverse exponential travel toward the higher %. You can balance that out by offsetting it with the expo feature of the transmitter, but for most purposes, 100% is a good number. Once you have set the high rate mechanically, you will need to set the low rate on the transmitter (I don't know of any other way to do it), but if you find that you never use the high rates, it will be beneficial to go back and reset the travel mechanically to the low rates (or whatever rate you like best).

Servo torque is given in inch/ounces. If your pushrod is 1" out on the servo arm, the servo should deliver it's rated torque to the pushrod. If you move the pushrod in to 1/2" on the servo arm, the servo should deliver twice its rated torque to the pushrod. The closer you can get that pushrod to the center of the servo arm, and still get the control surface travel you need, the more power the servo will deliver to the pushrod.

And yes, always use the farthest out hole of the control horn. Leverage.

Jim

< Message edited by jrf -- 8/4/2006 8:20:47 PM >

(in reply to biplane bill)
       Post #: 38

RE: New Giant GP Super Sportster!!!!! - 8/4/2006 8:11:19 PM   
biplane bill


 

Posts: 39
Joined: 7/15/2005
From: Evansville, IN, USA
Status: offline 		Jim,

Thanks for the input, I will definatly put that in practice when the new one comes in. Im also checking all the other planes in the hanger. Never put much thought in in. I checked and was not far off the curve, but some yes.

Bill

(in reply to jrf)