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Carl Goldberg Extra 300. Any suggestion is appreciated.

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Carl Goldberg Extra 300. Any suggestion is appreciated.

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Old 06-08-2004, 11:10 PM
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Abras
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Default Carl Goldberg Extra 300. Any suggestion is appreciated.

Today I just started building my Carl Goldberg Extra 300. This is my fist kit I ever build. I'm 4 months in the hobby and I'm just loving it. I'm already in my second plane (4*), and the Extra is going to be my third.
I already bought the engine, OS 91 4-Stroke Surpass II. And it came with I very beautiful fiberglass crow.

Today I just finish the stabilizer and I done it perfectly, I'm very excited to how things is going to be.

Just one question: Do you have any Suggestions or Tip about this kit?

I didn't choose any covering schemes, Any Suggestions? Where is a good place to find some?

Thanks.
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Old 06-09-2004, 02:43 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Hi
I had that airplane years ago, go with dual aileron servos, dont do the one servo with bellcranks.
How is the landing gear, when I had it in the early 90's it was real light, I liked a stiffer gear much better.


Good Luck

Bill
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Old 06-09-2004, 04:54 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Do a search on Extra 300. Under Search terms found in -> Change the default Subject to Body.

http://www.rcuniverse.com/forum/sear...mitbutton=+OK+

Here is just one of the posts.
http://www.rcuniverse.com/forum/m_10...tm.htm#1062376

Lots of postings,
John
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Old 06-09-2004, 11:24 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Thanks JNorton.

whidbey1, I will use two servos in the wing and about the landing gear it's the same one, but I think it is real light too. I will put another one, But I didn't choose one yet.
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Old 06-10-2004, 08:26 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

I am a little leary on the engine. A freind had one with a 61 in it. It barely flew. A Super tiger 90 fixed it. I'm kinda thinkin a 120 would have been a better choice. The power reccomendations in the kit are a little low. BTW the guy was a fantastic builder with over 30 years experience. It was not a lead sled. It flew fantastic with the bigger engine though. Good luck with your project.

Mark Shuman
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Old 06-11-2004, 04:15 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

I'm sure that with the OS 91 I can do what I want it for. I read a lot, and this engine do any acrobatic I want. I don't want 3D.

His is the photo of the KIT and the stabilizer.

I will shoot the entire project.

Any Help would be appreciated.
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Old 06-11-2004, 07:14 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

I flew mine on floats and it was great...
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Old 06-11-2004, 11:38 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

ORIGINAL: 69chevelle

I flew mine on floats and it was great...
That should be fun.

Did you made any modification so with something happends the water don't go inside and you lost your receiver and servos?
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Old 06-13-2004, 12:13 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Wrap the reciever in a plastic bag. The servos hold out water for a little while. Just have a retrieval boat nearby.

Good luck...
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Old 06-13-2004, 02:05 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

I'm not going to put my extra on floats. I was just curious because eletronics stuff don't like any kind of water.
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Old 06-13-2004, 05:16 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Abras I am only saying to do scale like airobatics I feel the engine will be too weak. On loops and such I feel it will not have enough power to pull it through. Verticle menuvers will be very hard. Energy management will be critical. The 91 will fly it. But to do what you want I still feel that you may need a little more power. BTW I do understand what you want. I don't think you could hang this plane on the prop with a 120. I would not want too either. It is just what you want. A great airobatic airplane. Just give the engine selection some consideration. I wish you well with this project. Good luck with it.

Mark Shuman
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Old 06-13-2004, 11:11 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Thank you for your opinion Mark.

Here is the facts:

I bought this KIT for a very good price, you know that kind of opportunity you can't miss. I was looking for a KIT to build, but with the money that I had, I wouldn't get a nice plane like this. And this already came with a fiberglass cowl that is a little more to spend.

My Father is in US right now, and I ask him if he could bring me a engine as a gift. He agreed but he said a limit of $$$ I could spend. I choose OS because I know their engines are easy to tune and don't give much trouble. I wanted a four stroke because I never had one, so it's good to "fell" new things. With the limit my father gave to me I could only ask him the OS 91. But fist I asked about it to a very close friend of mine that had the same airplane with a OS 91 and he told me that if I could build the plane very light then, the plane should fly perfectly in acrobatics stuff. Then my father bought it, So I already bought the engine, and I didn't got the 120 because of money problem (Was $100-$150 more expensive).

So I don't have any other choice.

The funny thing is I searched a lot in this forum, and some people says that it's flies well with a 91, others don't. In Tom Pierce review he says that it flow great with a 91, but I asked him in a e-mail about any tips and he said that the plane was underpowered. Then this very close friend that I trust says that I 91 works great. So as I can't change the engine I will build my CG Extra 300 With a OS 91 4-Stroke and review it. So we can all talk about if a CG Extra 300 can do all acrobatics using a OS 91 4-Stroke.
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Old 06-13-2004, 11:36 PM
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Default RE: Just started my CG Extra 300 Today. Any Suggestions?

Other thing that I didn't decided is the covering.
I will use oracover, but I didn't decided in what scheme.

Because it will be my fist covering the scheme can't be to complex, don't you thing?

I Liked 2 Schemes.
The Goodrich and Chile Air Force.

What do you guys like most? Same difficult or one is easier? And about my view from the ground, what is better?

Thanks a lot for the help!
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Old 06-15-2004, 05:34 PM
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Default RE: Carl Goldberg Extra 300. Covering schemes suggestions?

Abras,
The Chile Airforce (lower picture) would be much easier to cover as it is straight lines and no checkerboard on the nose. Additional it looks pretty straight forward and a beautiful machine as well.
John
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Old 06-15-2004, 07:19 PM
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Default RE: Carl Goldberg Extra 300. Covering schemes suggestions?

the engine wiil be a little weak emphasis on little .abras i completely under stand your position the os 91 fs will fly the air plane BUT the vertical will be very limited. understand im not talking for 3d either just basic vertical climd mine climbed about 25- 40 feet and completely stopped .but with that said it is a very enjoyable plane mine had very good slow flight charicteritics and you will enoy the plane very much
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Old 06-15-2004, 09:50 PM
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Default RE: Carl Goldberg Extra 300. Covering schemes suggestions?

ORIGINAL: rokevin

the engine wiil be a little weak emphasis on little .abras i completely under stand your position the os 91 fs will fly the air plane BUT the vertical will be very limited. understand im not talking for 3d either just basic vertical climd mine climbed about 25- 40 feet and completely stopped .but with that said it is a very enjoyable plane mine had very good slow flight charicteritics and you will enoy the plane very much
Do you have this plane with a OS 91?
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Old 06-15-2004, 10:55 PM
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Default RE: Carl Goldberg Extra 300. Covering schemes suggestions?

I already finished the Horizontal Stabilizer, Elevator, Vertical Fin and Rudder. Everything went great.
Now I have to begin the hardest part (I think), the wing.
I already read 5 times the instructions and I'm still confused.[&:] I don't know if is my english that isn't very good or the manual that is little bit confused. But I'm sure everything is going to be fine, I just have to be pantient.
I will post pictures tomorrow of what I already done.
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Old 06-18-2004, 02:28 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

Here in Brazil we use metric to measure stuff.
In US you guys use inch.
1 inch = 2.54 cm.
So When the say something like "3/8 sq. Basswood Spar" in the Instructions, I just divide 3 per 8, get this number and multiplies per 2.54 and I have the same measure in centimeters.
But Now I'm stuck because I didn't understood I measure.

Fist I have to edge glue two sets of three 1/16 x 3 x 36" balsa sheets. (Done!)
Then a have to Measure 3-5/16!QUOT! from opposite edges and mark.
Then Cut along the line established by the two marks.

My problem is that I didn't understood what is a 3-5/16" measure is.

Can anyone help me? Thanks.
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Old 06-18-2004, 03:52 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

If you're looking for a pretty simply color scheme that looks great on an Extra, try the Denny Dobson royal blue and cub yellow two-color scheme. Search for "Dobson" on www.airliners.net for lots of good pictures of the plane. I did my recent great planes extra 300 as a copy of his "protech asbestos removal" plane. The lettering is from customcutgrafix.com.
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Old 06-18-2004, 04:17 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

Nice Plane.
But I already decided. I'm going to do a Goodrich color sheme. Here in Brazil there is a guy that sells the goodrich lettering in any size I want, so it's going to be easy.

But Now I'm stuck because I don't know the measure thing. Can you help me too on that?

Thanks.
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Old 06-18-2004, 04:45 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

The measurement of 3-5/16 inches can be converted to 3.3125 inches by dividing 5 by 16 and adding this number to 3 inches. Then multiply by 2.54 to obtain centimeters, ie 3-5/16 = 3.3125 inches. Then 3.3125 x 2.54 = 8.4 cm. Hope this helps.
Godd luck.
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Old 06-18-2004, 06:00 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

Thanks a lot.
So everytime I see something like X-Y/Z", it's X" + Y/Z", right?
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Old 06-18-2004, 07:10 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

Abras, you are correct. In the old days, when documents were prepared by professional editors, 3-5/16" would be read aloud as "three and five sixteenths inches." In recent years the editing profession has lost its former standing, and we often see the same measurement expressed as 3 5/16", a space instead of a - (hyphen). Modern readers sometimes see 3-5/16" and wonder if that means "three minus five sixteenths." They don't know the difference between a - (hyphen, or to typesetters an en-dash) and a -- (minus sign or typesetters em-dash). Our PC keyboards and common word processing software no longer distinguish between the en-dash and em-dash. This is another argument in favor of metric and decimal expressions, which are simpler to exress and comprehend... but I think a hundred years from now the U.S. will still be measuring inches and ounces. If this confuses you, that's the normal reaction. But you are correct.
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Old 06-18-2004, 11:40 PM
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Default RE: Carl Goldberg Extra 300. Some Translation problem, Please Help!

Thank you very much, your explanations was perfect!

For us, that were born with the metric expression is very hard to imagine something in inches, miles, pounds and F (temp).
What I'm saying is that is someone says, it's 3 Km far away, It have 60 Centimeters and weight 10 Kg, It's 10 Celsus today. I can imagine in my head what is everything, but in yours system I can only imagine converting to mine.
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Old 06-23-2004, 08:35 AM
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Default RE: Carl Goldberg Extra 300. Any suggestion is appreciated.

I was with a camera problem, I manage that and here is the photos of what I already did.

I still have to cover the horizontal stabilizer, fin and left wing with a 1/16 balsa sheet. I will do that Later.

I just started the right wing.

(It's supposed to have 4 pictures here, But I think the upload is broken)
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