Gray,

I am out of town currently but once i get back i will definitely have to get you guys some more pictures. The plane is no where near mint. shes has been crashed and put back together. The owner before me did a good job repairing her but she could definitely use some more work. as for as the controls linkages go..... It currently has a pull-pull system for the rudder and a single servo operating the elevator. Both servos are mounted in the stock servo tray. I am not totally sure what I should change and what i should leave. Like i said once i get home and find some damn time I'll get you guys some pictures. Once again Thanks you all for you help! Its much appreciated.

Mike

Would anybody have some good tips for removing MonoKote? Just to make the process less harmless.

Mike

Use A heat gun to warm it up as you peal it off. Any left over glue/color on the wood I use some acetone to help remove it.

I tired to capture what the current planes modifications are. The two pictures below show the area right in front of the wing and the landing gear area. Judging by the looks would anybody say that I need more reinforcement?

Mike

Bump..... Help please!

Mike,
Here's my pushrod set-up on the Goldberg Extra, two elevator servo's with Central hobbies carbon fiber pushrods, pull-pull setup on the rudder.

Pushrods cross down in the fuse and servo's arms are pointed the same direction, this allows the use of a simple Y harness instead of those dreaded reversing Y's, just build up one servo with blocks to avoid the rods hitting each other.

This happens to be a picture of my Goldberg Sukhoi but it's the same set-up.

Here's a couple pics of the of the weak frontal area I did during the build. Custom cut a piece of lite ply with the angle and start where the former angles and go all the way to the firewall, I stayed below the opening to keep it lite. I can't really show a pic because I did'nt get any of it during the build.
I also put a piece of basswood vertically along the fuse side and the firewall to tie it all together.

Second pic shows the beefed up LG plate I installed, trashed the weak original.

You can actually see the first part of my reinforcement in the second pic, I did it in two pieces. second piece was actually a 1 inch wide piece that tied the firewall to the fuse side. The samll angled piece is really enough to solve the weak area forward of the gear. The other trick here is too make you LG plate larger and move it forward as far as possible, as the plane has a tendency to nose over with the original gear placement.

StuntPilot:

Thanks for the great pictures. Instead of putting the servos in the tray (stock position) why didn't you tail mount the servos for the elevator? Do you think my fuse is been strengthened enough? I am not firmular with this model in its factory trim...



Mike

Mike,
With a 1.08 up front and the 6 volt battery sitting as far back as possible in the fuse the plane balances perfectly. If I put the servo's in the tail I would need too much nose weight to balance it. Plus the fuse get's kind of skinny back there so fit is a problem, add the fact that I would have to build servo mounts and add more weight. You never want to add too much tail weight as it takes 5 times the weight to counteract it up front. The carbon pushrods solve the problem of pushrod flex you eliminate moving servo's to the back. It is much better to have them back there if the plane was designed that way, this one was'nt.
It looks like you have plenty of reinforcement up there, although it's kind of hard to tell.
You can kind of see the doublers in the first picture if you look close, nothing is doubled forward of the LG plate and that's why this plane always breaks there. The other two show the plane bare bones.

StuntPilot:

Thanks for you Help! Looks like i have to re think my servo tray to accommodate the extra servo... Once again thanks. I guess there is only one way to find out of the plane has been reinforced enough to with stand the stress.

Would you have any good ideas about a color combo for this particular plane... I was thinking about black on bottom and white on top........ with the wing line dividing them them....

Mike

The only thing about black on a airplane, sometimes they do not show up too good in the air. I myself like yellow and white with black pin stripes. On how much to reinforce....you do not add so much weight it ends up being a flying brick. Most airplanes fly much better "on the wing" instead of brute power and too much weight. Right Guys????? Capt,n P.S. Keep asking questions Mike...thats how you learn!

Stupid question time.... is it illegal to have a kit cutting company cut a short kit for the Goldberg Extra in a .40 size? This would make a fantastic smaller Extra for the likes of an OS70 to 90 size. Just a thought...

Mike,
Stay away from black, not a good color for the bottom. Red and white with a little black trim is what I'm striving for.

You can use a split elevator pushrod if you like, just use a quality servo.

Mike, the reason I installed the two elevator servos in the rear of the fuse on the yellow one was the engine, A YS 1.40 was going to make the plane nose heavy right from the get go. Before I hard mount my gear I always assemble my planes in the bones then sit the gear that can be moved in different places, I tape things on like servos and switches then see how it is going to CG. With the plane CGed I then hard mount my gear and make up my control rods, I have everything working while it is still in the bones then I take it apart and put all the nuts, bolts and screws in A container. {I tend to loose things in my shop} I do my final sand then cover and reassemble the plane. The CG should be very close and only need minor movement of the battery for the final CG. Colors?? I'm color blind so yellow with any dark contrasting trim works well for me and shows up in most any light conditions. This time of year white gets eaten up in any clouds floating by and in the air the plane is black enough. I have one blue and white plane that stays real close to me except for when I take it way up for A long flat spin. I hope the assemble first idea helps out, it makes doing any changes A lot easier. There is A photo of my 30% Extra above, the red and white one, it has four servos in the tail section of the fuse, two each for rudder and elevator, the weight of the G-62 up front dictated that right away. A lot depends on what you are putting in the plane.
Gene

Do you still have he 30 % Extra. thanks capt,n

Yes, it's photo is in this thread up at the top. I'm waiting on A new carb right now. I ordered the wrong one on ebay, sent it back and am giving the person I bought the carb from A week from now to reply and see if they have the correct one. If not I will order another one from someone else using the correct numbers. My mistake but I really need that carb to get back in the air.

Is this the 30% Extra? the airplane with the G62 in it? Thanks Capt,n

That doesnt look like a Carl Goldberg extra... That looks a bit bigger....

That is because it is not a Carl.G. Extra 300. It is a 30% (much bigger) Exta built by another company. Capt,n Think I will get a peaunt butter cookie! MMMMmmm

Send some Peanut Butter Cookies to Big Rapids!!!!

That is because it is not a Carl.G. Extra 300. It is a 30% (much bigger) Exta built by another company. Capt,n Think I will get a peaunt butter cookie! MMMMmmm
[/quote]

You know what...a 30% must be bigger that a 1/5 scale????? I goint to get another C O O K I E MMMMMMMmmm Capt,n ...peanut butter

That is A one of A kind 30% Extra, not an ARF. It was A gift from A friend I fly with once in A while, Handle on RCU is Bobzilla, A good pilot with A giving hart. I was just showing in the photo the set up for the rear servos but I have other planes in the shop that would have been better subjects but I would have had to pull one down, this one was on the work stand. There were two of these proto type planes built and submited to Tower trying for the contract for the Patty Wagstaff Extra but as we all know, they went to China. One of them was crashed so this is the only other one ever built, I'm now the forth owner of this plane. Too bad Tower didn't go with this one, it is so much better built then the Tower PWS with some features I have never seen before on any of the ARFs they are making. Bob flew it with A ZDZ 50 and it's one very smooth flying plane. Any questions on it just PM or email me so we don't clog up this thread. I think I had photos of Harley on here too, that's the CG Extra I'm flying these days. Can't go wrong with the CG Extras, other then the one little weak spot it's an outstanding build and flying machine. Gene

Carl.

Even though its not a CG its still a great looking plane! Thanks again for all your insight!

Mike

Hey Guys!


Its been a while I thought I would do some updating!

Well with some help from captain john and all of you I have got some progress to report! With the mono coat off as well as some minor fixes (broken bits, fire wall reconstruction, etc) the plane is now ready for a table jig for some straightening. Some where in the planes past life the tail assembly got twisted during either construction or an interesting crash. And as a result the right horizontal stabilizer is 1 and 3/8 of an inch higher then the left...

The plan of correction is as follows: use ammonia to wet the wood and use blocks to adjust the horizontal stabilizer to hopefully correct the issue. Hopes are high, cause I have a lot of time and effort invested. Wish me luck and please chime in and give some suggestions along the way!

Mike

I am helping Mike on this project. What we are trying to do is use a jig to hold the horizontal stab where it should be and soak with amonia in hopes to get a 1 &3/8 twist out. This would put the horizontal stab level again. We hope! Below..photo of Mikes photos from computer screen below. Any more ideas are sure welcome. Thanks Capt,n