Carl Goldberg extra 300 engine
 

I am very new to building kits, and flying period. This site was recommended by a friend for a better direction on building kits due to most of you having previous experience with this kit (hopefully). Well, I'm almost done building the wing, I do see slight mis-perfections, but that is getting better as I go on. Finding different types of tools to make something a little easier and more of a tighter fit.

Anywho, on to my question. I've looked on through the book, and the first few steps on building the fuselage it tells me to mount the engine...Ok that's fine and all, only problem is I don't have an engine. I have been doing research on engines left and right and decided I would like to put a gas engine in it. I've been looking at the DLE-30cc and I was told that may be to heavy. But I did see a Aero-works extra 300 with a 78" wingspan(only 10" larger) that takes a 35-45 cc engine.

Also it would be nice if you could give me pointers on servo's. I don't really want to put in 100$ or more servo's in. but I also don't want to put in cheap-o-crap in.

Can you give suggestions or lead me in a direction or two? That would be very helpful.

RE: Carl Goldberg extra 300 engine
 

Are we talking about the 68 inch Goldberg kit? Or the larger Goldberg arf?

Since we are in the kit forum, I am assuming th 68 inch kit.

The best engines for this airplane would be the YS 1.10- 1.40.

Any .90-1.20 two cycle will work.

Have you visited the Goldberg Extra 300 thread yet? There is a WEALTH of information for you regarding this airplane.

Brian

RE: Carl Goldberg extra 300 engine
 

The gas engine would be a BAD choice. This airplane builds heavy as it is. The airframe will not hold up to these gas engines unless you are willing to completely re-design the fuse. Even with th YS engines, you will find that people have needed to add doublers and bracing to the front of the airplane to accomidate the YS's.

If you are wanting to run gas, The Aeroworks airplane would be the far better choice to go.


You don't need to go too crazy with servos.

My opinion would say run servos with at least 60+ oz of torque, and a minimum speed of .15/sec.

Brian

RE: Carl Goldberg extra 300 engine
 

If you are "very new" to building & flying WHY are you even thinking of tangleing with an Extra with no less a gas engine??????? If you had experience in flying you would know the answers to your questions. When learning this hobby, the BIGGEST favor you can do yourself is keep it simple & reasonably priced. You see there is a "learning curve" that will take it's share of equipment. If the equipment is simple to repair & reasonably priced,it makes it a lot easier to stay in the hobby !!! Good Luck

RE: Carl Goldberg extra 300 engine
 

The Extra 300 is not designed for novice flyers.

It's a great building kit, and an even better flyer.....but works best with people who have building experience under their belt.

But I have a YS 1.10 in mine and it couldn't be a better flyer.

RE: Carl Goldberg extra 300 engine
 

Thanks for the help Brian, i will definitely look at the Goldberg thread. I just didn't see it earlier when I was browsing the site, And I'll look into those engines.

And for "outdoorhunting" ..I have the Extra here because I got it for a great deal (20 bucks), and thought it would be a nice project to build. I would like a gas engine because personally, I think it sounds a lot better. I have a couple trainers that i purchased on Craigslist, and I entend to fly those for a good year or two before I take the extra up. Both engines in the plane were ceased. I cleaned them, got new bearings and put them back together, and they are probably better than new (Having much experience with other engines).I will hopefully get flying on one within the next week or two.

RE: Carl Goldberg extra 300 engine
 

A gas engine is just too heavy for that plane.

Power to weight ratio would dictate a glow motor for that plane....I'd personally use a 4 stroke since the power band is wider, and will accomodate aerobatics a lot better.

A Saito 1.25 would be a great motor for that plane....and they sound cool!

Out of curiosity ....what gasoline motor were you planning on using?

RE: Carl Goldberg extra 300 engine
 

tycoonelyk-

Please. find a club near you (if you haven't already) and find an instructor that will help you. Not just with flying, but your build as well. There are many things to consider. Is the building surface you are building on flat?

I say this because I went through eight airplanes before decided to get help. Once I got help, I stopped losing money. We just want to see you be successful.

Obviously, I breezed by your comment regarding your experience without listening. The guys here aren't ribbing you, but want you to succeed as well.

Have someone inspect your Extra, and finish it, but keep it in a safe place until you have mastered a trainer, then a low wing trainer. At the VERY lest, this should be a 3rd kit in this regard.

I recommend a Hobby Lobby Telemaster, or a Sig LT 40 as a first airplane. You could even look into Hanger 9's P-51 trainer.

Good luck.

Brian

RE: Carl Goldberg extra 300 engine
 

I agree with the other fellows, a gasser for this plane is too much, too heavy, the structure is not designed to carry that type of engine. I am starting to cover my second CG Extra. The first one flew for 10 years and now my son has it. It started out with an O.S. 1.20 4 stroke and was later fitted with a Saito 1.50. Both provided plenty of power. While constructing #2 i couldn't decide which engine to power it with either. So in the mean time while i was pondering that, i simply taped the firewall in place (as shown in the picture) so i could keep on building, perhaps you could do the same until you decide what is best for you. This one will have an O.S. 1.08 2 stroke.

RE: Carl Goldberg extra 300 engine
 

I've found a club, and one of my friends has been flying for about 15 years and he is the one helping me out, and giving me pointers. I also built a 94 long by 40 wide table to build it on, and im using a pink foam drywall board for the pins. I did a lot of work before starting the build, and built a 27" P51 mustang to get my foot in the building door.

I was just looking at the DLE 30, but the weight and size of the engine is much larger than the recommended size, so I was looking for something else. But considering the advice, I'll look into the 1.10 and 1.20 sizes.

Thanks old scale, I'll tape it as well, because I'll be ready to start the fuselage tonight, but don't have the engine yet. And It is a good thing that my wing looks exactly like yours. So nothing is wrong with it.

RE: Carl Goldberg extra 300 engine
 

As far as building kits go the CG Extra is a pretty easy kit to build, the flying part could snap around and bite you. A 30cc gasser is really out of the park on this plane, it just wouldn't take the weight or vibration. I do have one of the 1.40 gassers from RC Showcase that I plan on using in my next CG Extra build but that's just a 22cc light weight high performance engine, the air frame will need some extra work but I know where, I have built several of these kits. I have so far run the OS 1.20 FS, the YS 1.20 FS and the YS 1.40 FS. The 1.40 was my top choice but the YS 1.10 would be another good one. This plane was designed back in the day when we had what are just standard servos and they worked quite well so you really don't need any of the super duper servos in this plane for sport flying. Have fun with the build and enjoy yourself.;)

RE: Carl Goldberg extra 300 engine
 

Here is a 20 cc aerovate gas engine - http://www.troybuiltmodels.com/items/AEROVATE20R.html Its not to heavy, and it's not bad priced, but I don't really know much about that company. The only problem I see with having a glow engine is that it seems to be very pricey to buy/run.

As for servos, I'll look in the $40-50 range. Any prefered companies? or specific type?

RE: Carl Goldberg extra 300 engine
 

Sorry, i don't know that engine brand either. I prefer Hitec servos. PM me for more details on the servos if you would like.

RE: Carl Goldberg extra 300 engine
 

Go pull up Servo City and see what they have on sale, I use Hitec servos or Futaba, a few JRs. Usually some very good deals at SC plus free shipping on orders over 100 bucks. Worth a look.

RE: Carl Goldberg extra 300 engine
 

Thanks for the info on Servocity, I've been searching around the site, and found this Hi-Tech servo - http://www.servocity.com/html/hs-663...hi-torque.html

That one looks nice and its not to much money.  It says "<font size="2">The Karbonite gears offer 4 times more strength than nylon gears and it comes with a great array of heavy duty horns and arms including mounting hardware."  That statement is quite appealing to me. I'm also using the 2 servo system for the ailerons. </font>

RE: Carl Goldberg extra 300 engine
 

Looks like a good servo to me.

Brian

RE: Carl Goldberg extra 300 engine
 

Now would I get 6 of those? or would I get 5 and a different one for the throttle?

The name is Kyle BTW

RE: Carl Goldberg extra 300 engine
 

Those are great servos. You can use a standard servo for throttle, i like the HS-425BB.

RE: Carl Goldberg extra 300 engine
 

All of the digital servos are pretty good. I tell my students to just buy the best servos they can afford because they , like your radio will be with you for a long time. The Karbonite gears are strong but they are also brittle. Don't misunderstand me on this because I use them all the time. By being brittle they will break if you have any flutter or you have a crash and the control surface snaps. All gears will do this, even metal but the metal gears do stand up a bit better. They do wear out quicker then the Karbonites though. The good news is you can just buy gear sets for a few bucks and it only takes a few minutes to rebuild them. How do I know this??? Those servos you are looking at are a very good choice. OSG and I use the same servo for the throttle too.

RE: Carl Goldberg extra 300 engine
 

One note, if you do use a gas engine Karbonite geared servos are out, hitec does not recommend using them with gas, only glow.

RE: Carl Goldberg extra 300 engine
 

That's good to know about the karbonite gears. I wouldn't want them to break and have to pay $20 or more just for each set of gears. Also from previous posts I understand how it would be better to go glow on this plane. I'll have to save the gasser for my future bi-plane (mmmmm) but that will only be in maybe 4 years. I'm in no hurry to buy things here and there. Just whats needed for the extra project.

 My one friend thats been flying for many many years came over today and saw one of two old planes I got on craigslist and told me it was a chipmunk and I didnt want to start on that either. The other plane that came with it is exactly like a trainer plane. I found an ad on craigslist, a guy was selling two older planes 4 radios a starter and a bunch of other stuff (everything thats needed for flying) came with a Royal .46 in the chipmunk and the other one has a Magnum Pro .45 in it. Both of the engines were ceased  and I rebuilt them as I mension earlier.

I will do more research on servo's and look around, but I am set on the HS-6635HB and I'd like to find a different one for the throttle because I wouldn't need that much torque.

RE: Carl Goldberg extra 300 engine
 

I've owned both the Royal a the Magnum Pro. The Magnum Pro was a SCREAMING MACHINE!!!!!!!!

Th Royal was difficult at higher altitudes, but eventually it ran very well. I wish I could get the magnum back. [sm=rolleyes.gif] Oh well.

Is the chipmunk a Goldberg Chippy?

Brian

RE: Carl Goldberg extra 300 engine
 

The Royal is running well, but I'll get it running better. All I know is that it's a chipmunk, and it has a sticker that says "Super Chipmunk" on the side.

RE: Carl Goldberg extra 300 engine
 

Waco, where did you read this information??? I haven't seen it before and been running the Karbonites for several years in my gassers. As I buy new servos I am going to steel gears but I have been using the 6985 in both of these planes. The Sukhoi is running a Brison 2.4 and the Extra is running a Zenoah G-62. I also have a Bipe with a 2.4 and the cheap 5425s and Kaos with a 1.4 with the same servos. So far no gears broken or stripped from vibration, that crash or bad landing thing I mentioned did creat a gear problem on two aileron servos but that was a me thing, pilot error.

RE: Carl Goldberg extra 300 engine
 

Sorry, but i am not buying in to this either.