Goldberg Extra 300
05-07-2018, 09:09 AM
#1826
Glad that your Extra finally took to the skies and had a successful maiden flight. You mentioned that the model does not glide well but is well balanced, a statement that just seems quite out of place when referring to a CG Extra. I would definitely check your balance again as it sounds like it could be nose heavy. What is your present CG location ? The Extra does have a nose over tendency during take off runs especially on grass strips but an easy fix with an alum l/gear is to rotate the main wheels forward about 1" by adding a 3/8" thk. wedge piece between the top of the gear and the fuse. It is also a very good practice to hold a tad of up elevator during the take off run on most tail dragger types. Regarding the fuel consumption of your DLE30, what size tank are you using and last but not least how much does the model weigh ?
Last edited by karolh; 05-07-2018 at 09:12 AM.
05-07-2018, 09:34 AM
#1827
My Feedback: (11)
New guy to this thread here. I've enjoyed reading up on all of the previous builds, it looks to be an easy build and a great flyer. I just picked up an unstarted kit at a local swap meet, and plan to build it over this next winter. I have a number of Super Tigre 90s for power, and the landing gear is being made by TNT as we speak.
09-14-2018, 05:29 AM
#1828
Join Date: Sep 2018
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I am pulling my 25 year old extra down from the rafters and starting on a conversion to electric.
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
09-14-2018, 05:34 AM
#1829
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Join Date: Mar 2004
Location: coolidge,
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I am pulling my 25 year old extra down from the rafters and starting on a conversion to electric.
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
09-14-2018, 07:59 AM
#1830
I am pulling my 25 year old extra down from the rafters and starting on a conversion to electric.
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
I'm thinking RimFire 1.20, CC Talon 90 ESC, 6s 8000Mah Lipo to start. That should give me pretty good performance and flight time as long as I can keep the weight under control.
Has anyone had experience good or bad with a similar setup?
Last edited by karolh; 09-14-2018 at 08:07 AM.
10-04-2018, 06:09 AM
#1835
A DLE 20cc would be an excellent power choice for your CG Extra. This engine is a fairly smooth running unit and once securely mounted there should no unwanted vibrations.
02-23-2019, 12:04 AM
#1839
Hello,
I have been working on the CAD Conversion of the Carl Goldberg Extra 300 - 68" wing span. I only have sheet one of the plans. Still looking for sheet two (wing and stab) to be able to finish it up. I took a guess at the stab based on what is on the sheet one. Take a look let me know what you think. I'll get a full size PDF posted once they're complete.
If anyone has a scan of sheet 2 that they can send me, I would greatly appreciate it.
I have been working on the CAD Conversion of the Carl Goldberg Extra 300 - 68" wing span. I only have sheet one of the plans. Still looking for sheet two (wing and stab) to be able to finish it up. I took a guess at the stab based on what is on the sheet one. Take a look let me know what you think. I'll get a full size PDF posted once they're complete.
If anyone has a scan of sheet 2 that they can send me, I would greatly appreciate it.
The instruction manual is available here: http://www.greatplanes.com/manuals/discontinued.php
02-23-2019, 04:54 AM
#1841
It's all looking quite good so far. I unfortunately don't have scan of sheet 2 and it's a pity I am located so far away from you as I do have a full set of plans.
02-24-2019, 06:26 AM
#1845
Join Date: Feb 2003
Location: N.Canton,
OH
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Hi Alan,
Your page 1 plans look great, I think you've got the hardest part done. When you draw the wing are you considering making any enhancements such as adding separate aileron servos, and maybe a 2 piece wing? Also, I've scratch built wings before, and the primary concern is the wing jig so that everything comes out straight. The Goldberg kit used break away tabs on a flat surface, along with the jig for getting the dihedral correct, will this be included in your drawing? You could also add capabilities for a 1/4 inch rod wing jig if you draw out individual wing ribs. This is more common in control line, but works well.
Thank you for sharing your efforts!
Jim
Your page 1 plans look great, I think you've got the hardest part done. When you draw the wing are you considering making any enhancements such as adding separate aileron servos, and maybe a 2 piece wing? Also, I've scratch built wings before, and the primary concern is the wing jig so that everything comes out straight. The Goldberg kit used break away tabs on a flat surface, along with the jig for getting the dihedral correct, will this be included in your drawing? You could also add capabilities for a 1/4 inch rod wing jig if you draw out individual wing ribs. This is more common in control line, but works well.
Thank you for sharing your efforts!
Jim
Last edited by jimamosn8cah; 02-24-2019 at 06:29 AM.
02-24-2019, 09:06 AM
#1846
Imcrazy - I am just a modeler and a draftsman, I have no desire to manufacture kits. Once I'm finished they'll be posted and make available the DXF file to those that want it. I'll also send them to OuterZone for posting as I have done with my other conversions.
Alan
Alan
02-24-2019, 09:15 AM
#1847
Thank you, I like to recreate the plans as originally published and then a work up the mods sperate. This thread has outlined a number of improvements that I would like to document. I perfer to use a wing jig also. I can add the 1/4" holes easy enough, say 4" on center?If I can get acurate info on the ribs I will add the breakaway tabs.
Hi Alan,
Your page 1 plans look great, I think you've got the hardest part done. When you draw the wing are you considering making any enhancements such as adding separate aileron servos, and maybe a 2 piece wing? Also, I've scratch built wings before, and the primary concern is the wing jig so that everything comes out straight. The Goldberg kit used break away tabs on a flat surface, along with the jig for getting the dihedral correct, will this be included in your drawing? You could also add capabilities for a 1/4 inch rod wing jig if you draw out individual wing ribs. This is more common in control line, but works well.
Thank you for sharing your efforts!
Jim
Your page 1 plans look great, I think you've got the hardest part done. When you draw the wing are you considering making any enhancements such as adding separate aileron servos, and maybe a 2 piece wing? Also, I've scratch built wings before, and the primary concern is the wing jig so that everything comes out straight. The Goldberg kit used break away tabs on a flat surface, along with the jig for getting the dihedral correct, will this be included in your drawing? You could also add capabilities for a 1/4 inch rod wing jig if you draw out individual wing ribs. This is more common in control line, but works well.
Thank you for sharing your efforts!
Jim
02-24-2019, 10:14 AM
#1848
Join Date: Dec 2016
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Imcrazy - I am just a modeler and a draftsman, I have no desire to manufacture kits. Once I'm finished they'll be posted and make available the DXF file to those that want it. I'll also send them to OuterZone for posting as I have done with my other conversions.
Alan
Alan
I bought the kit from a modeler but he forgot to tell me he hacked some parts.
I just had copy's of the plans made. And I got a hold of a copy of the 2 manuals.
But I am missing some parts.🙁
I will have to scratch some parts hopefully I may get some help here if I need it.
I am thinking the rccf 26cc gasser for power.
Thanks.
02-24-2019, 10:52 AM
#1849
Hello,
Let me know which parts you need, I'll put them on standard size paper
Alan
My next build is the Goldberg extra 300.
I bought the kit from a modeler but he forgot to tell me he hacked some parts.
I just had copy's of the plans made. And I got a hold of a copy of the 2 manuals.
But I am missing some parts.🙁
I will have to scratch some parts hopefully I may get some help here if I need it.
I am thinking the rccf 26cc gasser for power.
Thanks.
Let me know which parts you need, I'll put them on standard size paper
Alan
My next build is the Goldberg extra 300.
I bought the kit from a modeler but he forgot to tell me he hacked some parts.
I just had copy's of the plans made. And I got a hold of a copy of the 2 manuals.
But I am missing some parts.🙁
I will have to scratch some parts hopefully I may get some help here if I need it.
I am thinking the rccf 26cc gasser for power.
Thanks.
02-24-2019, 10:58 AM
#1850
Join Date: Dec 2016
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I am programming my cap and then run in the engine.
But I learned from the old timers years ago to have a new plane on the bench at all times. But I will start the 300 as soon as I can. . No arfs for me😝