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HelicopterOff Topics › NooB to Planks...Just got a Goldberg target Drone...need help
04-29-2004 04:44 PM  13 years agoPost 1
Salty

rrElite Veteran

St. Augustine

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Just aquired a Military Carl Goldberg target drone (Mig 27) i got it for free so Dont flame me on the styrofoam selection....as I said Its all styrofoam, visually Its a neat looking plane and friggen big, has a 90 sized engine in it and is in unfinished foam...still has all the military recievers and servos and such in it.which will get replaced with lighter more modern equipment..my question is is how do you cover or paint it put landing gear on (due to the styrofoam melt issue) (they wernt built with gear with the idea that they were going to get shot up anyway) It already has a KB90 size engine with it (new) I jst wanted to try my hand at planks and this freebee presented itself... I have heard that people build these things and fly em and there is web sites out there but am highly uneducated on this matter....any help (and I mean ANY!) would be greatly appreciated.....like I said this is a raw kit (oh it also has the duct tape hinges on the control surfaces......stock mil spec from what I was told????I would like to make it More visually appealing and functional.

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04-29-2004 04:50 PM  13 years agoPost 2
cannonfoo

rrNovice

Richmond, VA

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visit your lhs or local plank club

or buy a planker trainer kit to see how everything goes together - its easier to learn on too.

theres a wealth of websites on them too
http://www.google.com/search?q=Mili...a-search&num=20

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04-29-2004 06:53 PM  13 years agoPost 3
Steve Campbell

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Baton Rouge, LA

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Let me preface my remarks by saying I understand your desire to use a freebie.

Having said that, I have a question for you; knowing what you now know about helicopters, if someone gave you an MFA Sport 500, would you try to learn on it, or say "Thanks" and go get something more suitable for the task????

Those CG drones can be made rather respectable looking. But what you want to do is the equivalent of making a semi-scaler out of a Raptor by a raw beginner. IOW, it can be done, but there are easier things to attempt. Somebody well-versed in building with foam would not have any trouble. For a first attempt this project presents a lot of hurdles.

As for landing gear, you can probably epoxy some hardwood blocks into the foam at proper areas to mount wire gear. There are several ways to hinge foam flying surfaces, besides duct tape...

And once you got the plane ready, would you be able to handle it? Perhaps. Would you be able to land it safely. Without any prior experience, absolutely not. Imagine the way you felt the first time you tried nose-in; that's what landing a plank is like when you first try it.

If I'm not being clear here, I'll add that if you are really interested in being successful with planks, spend the $250 or so for an ARF trainer/engine/radio combo and find an experienced plank instructor. I think you would be happier doing that than putting some new radio gear in the Mig and watching it disappear in a cloud of foam pieces/parts...

.

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04-29-2004 11:27 PM  13 years agoPost 4
Salty

rrElite Veteran

St. Augustine

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already got all the electronics and quite frankly dont really care if they go up in a cloud of foam....Just wanted some Ideas to do the job...gonna have a few months of nothing but time on my hands (going to sea) soooo Figured I would make it work...I dont like planks enough to go spend 250 bucks on a good trainer...not worth it to me... rather take what I got and make it work till it dies...then light it on fire and move on.... was just looking for Ideas on people that have done it...

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04-29-2004 11:55 PM  13 years agoPost 5
S_Owen

rrApprentice

Wichita Falls, TX.

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Step one, remove engine.

Step two, replace everything else.

Chalk it up to a free motor and move on. Get a trainer.

250bucks? If you have the radio gear, the plane minus motor is like 100 bucks. Get a 60 for 150 and stuff that 90 in it. hehe

[b]Murphy's Constant:[/b] Matter will be damaged in direct proportion to its value.

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04-30-2004 02:24 AM  13 years agoPost 6
Salty

rrElite Veteran

St. Augustine

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ok topic closed....ya'll arnt any help in this matter I'll figure it out on my own and let ya know when its done or when its a pile of shreaded foam...then you can say I told you so...thanks for all the help

cannonfoo....thank you for the search....turned up alot of good info...the kind Of info I was actually Looking for anyway

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04-30-2004 12:30 PM  13 years agoPost 7
Steve Campbell

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Baton Rouge, LA

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<<(ANY help)>>

You asked for advice from those of us experienced with planks. We offered it.

Too bad it wasn't what you wanted to hear; sorry for wasting your time and mine.

.

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04-30-2004 02:06 PM  13 years agoPost 8
S_Owen

rrApprentice

Wichita Falls, TX.

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No doubt. It's not like some of us have flown planks for longer than some members have been alive.

[b]Murphy's Constant:[/b] Matter will be damaged in direct proportion to its value.

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04-30-2004 06:04 PM  13 years agoPost 9
deckerv

rrVeteran

Wellsville, NY

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I'd take a set of aluminum landing gear and fasten it onto the body with some 1/4" plywood recessed into the belly of that beast.. The nosegear my be a bit more difficult... not quite sure how to pull that off easily.

Anyway... use some top-flight econokote and set the iron at a LOW temp.. the foam will melt away rather easily

Good luck...not my choice of a trainer.. but heck.. the price was right

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04-30-2004 10:15 PM  13 years agoPost 10
A. Bundy

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Aurora,IL. 30W/SW of Chicago

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Planes can kill you just as easy as a heli in untrained hands.I'm not saying to junk it,but a plane guy helping you on the box is a good idea.

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05-01-2004 01:01 AM  13 years agoPost 11
Salty

rrElite Veteran

St. Augustine

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Typically when someone asks for help they are not looking for "throw it away and get something else" they are looking for answers.... you may have all the experience in the world but ya didnt pass any of it along by telling me to trash it did ya? I dont do that to new guys in helis...I may tell them "well thats not what I would do this is what I would do but if thats what you want to do then lets put our heads together and do it!
for those of you that had good ideas thank you
all others

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05-01-2004 08:47 PM  13 years agoPost 12
sweetP

rrApprentice

Sarasota,Florida

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I've flown and crashed several

Rotorpsyco,
Don’t despair I have flown and crashed several of the Goldberg Mig 27s. They came three airframes to a box and were powered by a K&B 65. The Transmitter looked very much Government Issue big and ugly with an 8’ antenna. The transmitter had four channels to broadcast from marked A, B, C and D. We would put them together with epoxy and duct tape. The epoxy would hold the firewall, and tail parts as I recall and the hinges were made from the duct tape. We would hand launch the finished planes and fly them as targets for the Hum Vee mounted missile system Phoenix I think. Oh they never shot at us, they would just practice tracking the plane (it had a big piece of aluminum foil in it). The planes were very easy to fly, controls were throttle, elevator and ailerons. The planes would crash do to the tape hinges coming apart during flight caused by heat and wing flex. A member of my club had one with gear mounted to plywood plates glued to the fuse. He painted the foam with O.D. camouflage latex house paint that he had made at the Home Depot. His plane flew very well and looked good as a stand off, fun scale plane. My thoughts; replace the duct tape hinges with Robarts hinges glued in with epoxy. Add a controllable rudder to the plane. Replace the push rods and control horns with better quality hardware. You may want to add a carbon spare top and bottom, the wings flex a lot! And might fail. Then fly it with someone that has plank time, I’ll do it if you want to drive to Sarasota. The one my friend had lasted so long that he traded it off to Trader Bob at House of Hobbies in Largo Fl. For all I know it’s still flying. Good Luck.

What was my tag line? AMA 139721

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05-01-2004 08:51 PM  13 years agoPost 13
sweetP

rrApprentice

Sarasota,Florida

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Mayports a long ways from here!

What was my tag line? AMA 139721

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05-02-2004 06:45 PM  13 years agoPost 14
rcnuts

rrVeteran

Millersville, Penna

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Dude, I think its way cool! Ultra Cote is a low temp covering that you can iron on. (I fly slope ships also, and use this covering on EPP foam and the basic stuff) As far as hinging goes, a plane that size really needs proper hinges to stay together for any lenth of time. Small hard balsa blocks recessed and glued into the trailing edges of your wing and tail surfaces will provide the necessary support for real hinges to be installed. Once the blocks are epoxied in, cut the hinge slots with one of those hinge cutting machines or by hand. For your sake, DONT USE CA HINGES! Use real hinges with a barrel and pivot point. Robart hinge points are good also, just make sure the blocks are deep enough to accept the hinges.
The firewall is a main concern. You may want to cut channels in the fuse, and epoxy in hardwood blocks, that will later be screwed into, through the firwall itself. This is really important, as that plane isnt designed to withstand sustained vibrations.
PM me if you have specific questions, and post some pics!
Harris,

Hooligan, at large

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05-02-2004 10:09 PM  13 years agoPost 15
Salty

rrElite Veteran

St. Augustine

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started smoothing her out today.... gonna make a hobby store run tomorrow...ok here's the deal....the wing has too much flex in it so I am epoxying two spars of kevlar (total of four) on top and on bottom (I had the kevlar angle peices at the squadron) for right now Once I reinforce the wing and the fuse (gonna put kevlar behind the engine mount and behind the wing and run a spar the whole length of the fuse) I believe I'm just gonna paint it with standard latex house paint as thats what I've heard others doing.... (any better ideas on paint like non foam eating aerosol) epoxied the hardwood engine mount in today also and will get the flaps properly installed soon....need to make a rudder also...

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HelicopterOff Topics › NooB to Planks...Just got a Goldberg target Drone...need help
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