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Little Jumping Bean

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Little Jumping Bean

Post  706jim on Fri Apr 03, 2015 5:31 pm

I built one of these several years ago powered with a Black Widow 0.049.

Never got around to flying it and was wondering how twitchy it would be for someone who hasn't flown U/C for many years.

In earlier years, I successfully flew an Ambroid Whipsaw, PDQ Circus Prince, Jr Nobler, CG Voodoo etc.

Anybody else have one of these?
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Re: Little Jumping Bean

Post  rogermharris on Fri Apr 03, 2015 6:01 pm

i built a few and am building a couple trainers now.  that plane is very responsive and the blackwidow has the larger fuel tank. i even added flaps to them for more response.
 i would think you would want to start back with something slow and a shorter running engine as i plan to do to get my feet wet again


Last edited by rogermharris on Mon Jul 27, 2015 5:58 pm; edited 1 time in total
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Re: Little Jumping Bean

Post  Ken Cook on Fri Apr 03, 2015 6:31 pm

The Jumping Bean is a very good flying airplane. If you were to build another, keep the controls slowed down and all should be fine. Replace the stock control horn with a larger horn minimum of 3/4" and place the pushrod in the hole furthest away from the hinge point. Most bellcranks from the era that the plane was produced (Perfect) for example only utilized one hole which generally gave the bellcrank quite an advantage over the elevator. I prefer to make my own or if need be redrill the pushrod hole as close as possible to the center point which slows the controls down making the twitchiest plane a timid flyer. Combine this with the proper handle with the line spacing no greater than 2" allows for a point and shoot plane. Ken
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Re: Little Jumping Bean

Post  larrys4227 on Mon Jul 27, 2015 5:53 pm

Rather than starting a new thread, I figured I'd jump on this one.

Coming in a Brodak order this week is a Jumping Bean. I've wanted a regular type 049 plane, but I also need a plane to practice some finishing techniques on. You see, I have a 35-sized Prowler stunt plane on my bench, and will be finished silk and dope. The silk I've done before, but always finished with rattle cans. I don't want to practice dope colors on the Prowler.

Not sure what engine for the Bean, but most likely be an integral tank. I keep seeing a Texaco Tapien Serpent engine .... its got a stunt tank.

Looking forward to the Bean.... and I'll try to fix all the things others have reported in other threads.
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Re: Little Jumping Bean

Post  rogermharris on Mon Jul 27, 2015 6:04 pm

I have been up in the air about what to build as my next step up but liked the bean. I would use a black widow though.  I have not read up on what to change to improve it..  please do a bit of a build log if you would. May bee it's one to do a modified kit for...
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Re: Little Jumping Bean

Post  Cribbs74 on Mon Jul 27, 2015 6:50 pm

Do yourself a favor and use a Medallion.

The Brodak kit should come as a beam mount with instructions on how to modify it to a radial mount.

So... If you use a Medallion you won't have to modify anything. The Medallion works well with an external tank and also easier to start and achieve consistent runs.

I have a build thread around here somewhere that chronicles all the headaches I went through before I changed the nose and mounted a TD.

Ron
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Re: Little Jumping Bean

Post  larrys4227 on Mon Jul 27, 2015 6:59 pm

Ron, I believe I did go through a thread with your name on it. I'll need to go back and review as I build.

Are the Medallions available? I don't think I saw them on EX or Cox canada.
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Re: Little Jumping Bean

Post  rogermharris on Mon Jul 27, 2015 7:03 pm

Cribbs74 wrote:Do yourself a favor and use a Medallion.

The Brodak kit should come as a beam mount with instructions on how to modify it to a radial mount.

So... If you use a Medallion you won't have to modify anything. The Medallion works well with an external tank and also easier to start and achieve consistent runs.

I have a build thread around here somewhere that chronicles all the headaches I went through before I changed the nose and mounted a TD.

Ron

Well Ron it looks like I have a lot of reading to do. I see 4 different threads by you on the bean.

Larry. EBay... I just won one for $35 over the weekend!
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Re: Little Jumping Bean

Post  larrys4227 on Mon Jul 27, 2015 7:19 pm

Thanks.... I'll have a look.
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Re: Little Jumping Bean

Post  Cribbs74 on Mon Jul 27, 2015 7:33 pm

larrys4227 wrote:Ron, I believe I did go through a thread with your name on it. I'll need to go back and review as I build.

Are the Medallions available? I don't think I saw them on EX or Cox canada.

Not through those sources, although Exmodel deals wirh refurbished engines that are affordable. May be worth a look.

Your best bet would be Ebay, they can be found there new or used. Don't shy away from used units as most parts are available if needed. Often times they just need a little cleaning.

Another option is to post a want ad here, Stuka Stunt and Stunthangar. You may have better luck with the latter as lot's of folks here plan on being buried with their Cox engines... lol!

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Re: Little Jumping Bean

Post  RknRusty on Mon Jul 27, 2015 7:35 pm

I have a huge build thread on the Bean. It might be at RCG. But I knew nothing about building a quality model at the time, and that's the plane that got me on the right track. Boy did i ask some dumb stuff... and resisted advice... man was I hard headed. I'll see if i can dig it up. I bought it when I decided 46 years was too long to have been flying and still not know how to fly a loop.

Meanwhile here are before, during and after pics. See my avatar, guess what that is..

Young and beautiful




Later in life




End of life and resurrection. After having yanked the bellcrank out of the center and cleaning out every inboard rib... in the middle of a loop. Notice the added wing area at the TE and tips.




Reborn as The Refried Bean Norvel .061. Now this is a true pocket rocket!

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Re: Little Jumping Bean

Post  RknRusty on Mon Jul 27, 2015 10:06 pm

Here's my build thread. Watch me grow from a modeling Doofus to a somewhat decent builder. lol!

http://www.rcgroups.com/forums/showthread.php?t=1422829

And the Refried Bean thread on CEF
https://www.coxengineforum.com/t3359-the-refried-bean-build-it-flies#46324

Both are listed in my RC Groups blog page
http://www.rcgroups.com/forums/member.php?u=313307

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Re: Little Jumping Bean

Post  larrys4227 on Tue Jul 28, 2015 6:23 am

Nice build thread on RCG Rusty. I've already got a mental list of things I want to change/improve. Yeah, I want it to fly good, but the fiirst reason for this kit is the practice finishing. I also want it for duty if someone wants to try C/L flying. I have no planes currently that will do that .... or willing to sacrifice on a newb/retread. Got lots of time to consider an engine .... I'm still leaning toward something with built in tank for simplicity.
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Re: Little Jumping Bean

Post  RknRusty on Tue Jul 28, 2015 9:51 am

larrys4227 wrote:...Got lots of time to consider an engine .... I'm still leaning toward something with built in tank for simplicity.
I prefer the engines with separate tanks, so as to avoid the maddening air leaks and unplanned teardowns. But if you go with a new one, Bernie's Super Bee probably gives you the best bang for the buck. http://www.exmodelengines.com/product.php?productid=17877&cat=279&page=1 It has the short-piston type SPI and a hex drive plate so you can use an anti-reverse cam starter(at least in the picture). Matt's Red Arrow is basically an old style Black Widow, but it doesn't have a dual vent stunt tank. http://www.exmodelengines.com/product.php?productid=17877&cat=279&page=1

Both would do the job of flying your Bean for a good price. I kind of like Ron's suggestion of a Medallion. Super simple, always cranks and has lots of power. Then again, so does the Killer Bee II, http://coxengines.ca/cox-.049-engine-killer-bee-ii.html  Just chop half of that yellow extension off the needle so it doesn't vibrate its threads off.
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Re: Little Jumping Bean

Post  rogermharris on Tue Jul 28, 2015 9:56 am

i read through most of that thread too rusty.. thanks for finding it.

i always like the decal sets and the different way a goldberg kits were went together. the rubber band shock mounted landing gear was cool i thought at the time

here my two favorite 1/2A's from 74 i think.

my blackwidow powered and flapped baby ringmaster and golden bee powered bean. don't recall what the plane was in between them.  may have been one of my brother in law's planes. i think that is the one i started converting to a combat wing....  i am lucky to still have these two engines but the planes are long gone.
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Re: Little Jumping Bean

Post  RknRusty on Tue Jul 28, 2015 3:24 pm

I bet that Baby Ring could just about catch its tail with flaps on it.


Last edited by RknRusty on Tue Jul 28, 2015 5:47 pm; edited 1 time in total

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Re: Little Jumping Bean

Post  TDbandit on Tue Jul 28, 2015 5:30 pm

I can vouch for the Red Arrow, I have one on my Skyray and it's a strong engine! yanks it around the circle like it doesn't know there's a plane stuck to it but as rusty said, it lacks a stunt tank. (Bandit)
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Re: Little Jumping Bean

Post  larrys4227 on Thu Jul 30, 2015 8:27 pm

My Brodak order arrived to day ..... just a couple of the sundries below.

I've been in search of a ceiling tile to build on, but can't seem to find a single sheet. No, I don't need a whole case Mr Lowe's .... geez, dont they understand that stuff is used for other things than ceilings???  lol!

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Re: Little Jumping Bean

Post  dckrsn on Thu Jul 30, 2015 9:04 pm

Maybe try a local lumber yard, Larry.
They're usually a little more accommodating.
Call ahead.
Bob
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Re: Little Jumping Bean

Post  larrys4227 on Thu Jul 30, 2015 9:17 pm

Thanks Bob .... I'll try that too. I was also thinking of stopping by an Ace Hardware .... they're usually pretty helpful.
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Re: Little Jumping Bean

Post  RknRusty on Thu Jul 30, 2015 9:26 pm

larrys4227 wrote:...I've been in search of a ceiling tile to build on, but can't seem to find a single sheet. No, I don't need a whole case Mr Lowe's .... geez, dont they understand that stuff is used for other things than ceilings???  lol!...
Lowes sells 24x24 drywall squares for a buck or two each. I tape 4 of them together with blue painters tape, and seal the edges with blue tape too. It works well, but is a bit harder to press pins into.

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Re: Little Jumping Bean

Post  larrys4227 on Fri Jul 31, 2015 4:41 am

As a last resort, I'll use drywall. I've used it before, and it is nice to keep things flat/straight, but it is a bugger trying to get the pins in. I'm going to exhaust a bunch of options before I turn to it.

My current build has foam core wings, so I escaped having to deal with it
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Re: Little Jumping Bean

Post  larrys4227 on Fri Jul 31, 2015 10:33 am

Found it!

HobbyLobby
1/2" X 10" X 30" Foam board. Both sides have a thin lamination. Boards are displayed flat, and not on end like a couple of other possibilities I saw. These are flat as pancakes with no warp that I could see.

It's a homerun @ $5.00
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Re: Little Jumping Bean

Post  Marleysky on Fri Jul 31, 2015 1:45 pm

[quote="larrys4227"]
I've been in search of a ceiling tile to build on, but can't seem to find a single sheet. No, I don't need a whole case Mr Lowe's .... geez, dont they understand that stuff is used for other things than ceilings???  lol!

Are you near any construction projects, strip malls or commercial building sites?  I recently got a life time supply of small diameter copper tubes (lead out line guides) out of a discarded air conditioner, I also got a 1/2 full  5 gal bucket of drywall joint compound and enough drywall  pieces to patch the water damaged wall and ceiling in my kids bedroom. The school system is spending their building fund money upgrading the fluorescent lights to LED's  so their dumpster had all sorts of 2x2 and 2x4 light fixtures and "old" 2 x 4 ceiling tiles that were being dumped.....not recycled.....just dumped. Plus they came out of a "non-smoking building" so they weren't stained.  I did not take any cause I didn't need any, but if you look around your neighborhood if there's any construction / remodeling going on you should be able to get what you need, if you want to recycle what others  are throwing away. tongue
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Re: Little Jumping Bean

Post  Ken Cook on Fri Jul 31, 2015 2:38 pm

Go to a construction site. We throw out thousands of them. Half the time the other trades aren't complete prior to installation and new tiles are thrown out by the cases due to scuffs. If you can get a Humigard tile, even better. They're a bit softer and will tolerate moisture and dampness. Ken
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