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Eflite Jenny Put-together-thread

Old 11-08-2007, 05:37 AM
  #1  
aviatordave
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Default Eflite Jenny Put-together-thread

I got this about a week ago and am ready to put it together. Here is the link:

http://www.horizonhobby.com/Products...ProdID=EFL1900

Here are the specs:

Specs
Wing Span: 32 in (810mm)
Overall Length: 26 in (660mm)
Wing Area: 304 sq in (19.6 sq dm)
Flying Weight: with Battery 7.5–8 oz (210–225 g); without Battery: 6.9 oz (195 g)
Motor Size: E-flite Park 250 2200 Kv
Radio: 3 channels with 2 super sub-micro servos (6-gram)Servos: S60 Super sub-microProp Size: GWS 6x5 slow flyer (GWSEP6050B)
Speed Control : E-flite 10A Pro Brushless (EFLA1010)
Recommended Battery: 480 2-cell Li-Po (THP4802SJPL)
Approx. Assembly Time: 3 hours

Here is what it looks like out of the well packaged box:




The detail they provide is appreciated -




The cowl is off and the motor mount area exposed:




Notice the amount of built in right thrust that is provided:

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Old 11-08-2007, 05:42 AM
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Yes...'Dave' luck has set in and the cowl is damaged. I can fix it so it wont be noticed, alot easier than trying to get a new one:




The gapless hinges are perfectly installed....I'm impressed!



The tail section gets assembled only one way, cant screw this up!



Make sure it gets glued on square -



Then glue square to the fuse -

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Old 11-08-2007, 05:46 AM
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Notice the flat profile type wing with a bit of undercamber to provide the slow flight -




Although the tops of the wings provide that 'ribbed' look -



I am even impressed with their solder work on the landing gear.




I put the wings on to see how it looks. I'm still waiting on the motor and servos to show up in the mail.


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Old 11-08-2007, 07:59 AM
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BradT
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Good timing with this thread, Dave, as I just picked mine up a few days ago, and hope to start assembling it this weekend. I bought the motor, esc, and battery pack at the lhs, along with the kit, so I don't have to wait for anything other than the time for this little project. I've seen on other threads that installing the rigging is a good idea, and that the wheel hubs need some inserts to strengthen them. I'm looking forward to having an indoor model, as my past experiences with trying to fly "parkflyers" indoors have been less than satisfying. No real crashes doing that, but no real fun either, as constantly banking and yanking to keep off the walls gets a bit stressful.
Brad.

BTW, the wingspan is actually 33" at the LE, and 35" at the TE, so averages 34" at the middle. That's an inch or so more than my SE5a, but the wing loading should be less than half as much.

Last edited by BradT; 11-08-2007 at 08:10 AM. Reason: add P.S.
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Old 11-08-2007, 05:51 PM
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Hello Dave. Glad to see you are doing a build thread on this one. What motor did you decide on?

I can't keep this plane out of my head! I can just picture it floating around the cul du sac that I live on. We have frequent no-wind days here, and it would be nice to get some flights in without having to load up the car. I am definately going to get one soon.
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Old 11-09-2007, 05:10 AM
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Default Power System

I got my motor, servos, props, and batteries in the mail today!

I'll show you the components and give you links to where I got them.

Here is the motor, it is from Heads Up RC. A 2712-12 Outrunner






I already had this ESC....its an 18 amp, way overkill. I'll see if it fits in to save me a buck.




Here is a 9 gram servo I will be using. I also got this from Heads up RC



Also...the battery from Heads Up RC. Its a 2 cell 20C 500 mah Lipo -




Here is the recommended prop, a GWS EP9047 Propeller




and last but not least, here is the prop saver from Heads Up RC


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Old 11-09-2007, 05:34 AM
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Looks good Dave,
you've done a great job of laying your build out for us. A lot of good detail. Keep up the great job!..
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Old 11-09-2007, 05:40 AM
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I ordered my Jenny today!

I also went to HeadsUpRC for my power setup. I decided on the 2210-21 outrunner with a 12A ESC. Not quite as much power as yours, but it should do nicely. I also got servos from them (the smaller 5g ones), and the same battery and prop saver as you. About the only thing I still need is an Rx. I will probably get a Berg 4 channel.
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Old 11-09-2007, 05:43 AM
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lol...you beat me Doug...I just sent you a pm...
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Old 11-09-2007, 05:45 AM
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as one who is into photography also I appreciate the good clear pictures.
Here is a picture I have taken
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Old 11-09-2007, 05:52 AM
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So are you gonna use the same saetup on the GWS biplane also?

Jim
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Old 11-09-2007, 05:57 AM
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Hi Dave that looks like a very nice plane, lots of detail to it, I still think that your having to much fun with these Rc planes Take care, Chellie
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Old 11-09-2007, 03:09 PM
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Originally Posted by JimClark View Post
So are you gonna use the same saetup on the GWS biplane also?

Jim
Yep, exactly the same. I bought 2 of everything from Heads Up RC.

[edit...cool pic Jim! I didnt see that before. If we have another contest I would use that if I were you!]

Last edited by aviatordave; 11-10-2007 at 10:03 PM.
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Old 11-10-2007, 10:00 PM
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Installing the motor.

Well......first modification. I kind of knew this was going to be needed. The black carbon tube is made especially for the eflite 250 outrunner. That motor was a bit pricey so I got a little stronger motor from Heads up. I'll walk you thru the fit -

Here is a picture of the carbon tube and the rear of the outrunner I will be using, they are the same size. The tube is supposed to fit over the shaft.




Here is the new piece that I made, its just nylon stock I found at work and drilled out to fit the shaft.





Here is an idea of what the black tube does to hold the eflite 250 outrunner in place (if you so determine you need that motor)




Here is a big picture of the pieces:


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Old 11-10-2007, 10:01 PM
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Here I just cut everything down to size. You need to measure the length to make sure the motor shaft (prop side) extends out of the cowl





Here is a side view:





And another view looking from the bottom:





More to come later...I have to go to a wedding tonight
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Old 11-11-2007, 01:11 AM
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Hey Dave, do you think the heat disipating from the motor will be a problem for that plastic tube you made? I really have no idea how hot they get.

Glad you are blazing the way, because I am going to have the exact same problem when I am putting mine together next weekend!
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Old 11-11-2007, 03:52 AM
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Originally Posted by D Payne View Post
I ordered my Jenny today!

I also went to HeadsUpRC for my power setup. I decided on the 2210-21 outrunner with a 12A ESC. Not quite as much power as yours, but it should do nicely. I also got servos from them (the smaller 5g ones), and the same battery and prop saver as you. About the only thing I still need is an Rx. I will probably get a Berg 4 channel.
I noticed the back end of this motor is a little different, the carbon tube might work or you might be able to use the base mount and secure it to the motor box.



------------------------------------------------------------------
With my motor I dont think the heat will be too much of a factor. From the specs it draws 8-9 amps max and there seems to be alot of metal to help share the heat. I have a similiar motor on a 3D foamie and it barely gets warm after 10-15 min of flight. In the manual it says you do most cruising around @ 1/2 throttle....I dunno, we'll see
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Old 11-11-2007, 04:54 AM
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Hi Dave,
I've been following your build.. Nice job. Real good close-up photos too. Really helps go along with your explanations.. Thanks.
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Old 11-11-2007, 06:00 AM
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Thanks Dave
Humm contest I didn't know there were this kind of contest. I thought they were ariel photography. Im up for it.

JIm

Originally Posted by aviatordave View Post
Yep, exactly the same. I bought 2 of everything from Heads Up RC.

[edit...cool pic Jim! I didnt see that before. If we have another contest I would use that if I were you!]
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Old 11-11-2007, 06:25 AM
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Originally Posted by Airhead View Post
Hi Dave,
I've been following your build.. Nice job. Real good close-up photos too. Really helps go along with your explanations.. Thanks.
Glad you like. Are these big pics too much on the PC? I wasnt sure if I should do it this way or use the thumbnails. I like the close up pics also, I just turned 40 this year and needed glasses. The macro shots help us older guy to put things into perspective

Originally Posted by JimClark View Post
Thanks Dave
Humm contest I didn't know there were this kind of contest. I thought they were ariel photography. Im up for it.

JIm
They had a calendar contest a little while ago for 2008. Once in awhile they have other contests, so keep that in mind, it doesnt need to be aerial photo shots at all.
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Old 11-11-2007, 06:28 AM
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The Jenny is looking good Dave. Glad to see I'm not the only one up late building.
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Old 11-11-2007, 06:32 AM
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Originally Posted by Grasshopper View Post
The Jenny is looking good Dave. Glad to see I'm not the only one up late building.
yep...lol

aint we some wild and crazy guys? Sitting up Saturday night working on RC planes. And some people lead boring lives.....
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Old 11-11-2007, 06:35 AM
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Originally Posted by D Payne View Post
Hey Dave, do you think the heat disipating from the motor will be a problem for that plastic tube you made? I really have no idea how hot they get.

Glad you are blazing the way, because I am going to have the exact same problem when I am putting mine together next weekend!

Hi That was my thought too, as the motor might spin in the nylon motor mount, and damage the wires, hope not, the build is looking great, take care, Chellie
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Old 11-11-2007, 06:41 AM
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Originally Posted by CHELLIE View Post
Hi That was my thought too, as the motor might spin in the nylon motor mount, and damage the wires, hope not, the build is looking great, take care, Chellie
That is the same basic system that eflite uses for the recommended 250 outrunner. They said to use RTV to secure the shaft to the tube. It feels very strong & a tight fit. The plane only weighs 8 oz and the motor pushes 12 oz of thrust (a bit overpowered, no biggie )

So....all in all its really a small plane with a small motor. RTV can withstand temps that internal combustion engines produce & make a strong bond, so I assume it should hold.

(right?)
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Old 11-11-2007, 06:55 AM
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Originally Posted by aviatordave View Post
That is the same basic system that eflite uses for the recommended 250 outrunner. They said to use RTV to secure the shaft to the tube. It feels very strong & a tight fit. The plane only weighs 8 oz and the motor pushes 12 oz of thrust (a bit overpowered, no biggie )

So....all in all its really a small plane with a small motor. RTV can withstand temps that internal combustion engines produce & make a strong bond, so I assume it should hold.

(right?)
Ok I Learn something new every day, Take care, Chellie
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