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Author Topic: Lunchbox HLG  (Read 614 times)
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dosco
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« on: June 25, 2020, 10:40:34 AM »

Currently going through some 'life changes' and am trying to focus on fun activities. I haven't built anything in a long while, and thought it would be super fun to knock out some small HLGs. After looking at several plans, I settled on the Lunchbox. I built 3. I had to deviate from the plan regarding the wing thickness, I used what I had on hand which was 3/16" (instead of the called-for 3/32")...with the "I don't care so much, and want to have some fun" attitude I didn't worry about it too much. Used my newly acquired razor plane to shave the wings, which was fun. Had some relatively nice 1/32" and 1/8" C-grain for the tailfeathers and fuse. Sprayed the wing and forward fuselage with Deft spray laquer, then in the spirit of fun I sprayed the top and bottom of the wing with color (the bottle of orange crapped out and I had to switch to red). Added some numbers for more fun.

Yesterday I tested #1 in the front yard and it flew ... surprisingly "floatily" (I was really surprised, figuring it would be a lead sled) ... without any nose weight.

I pulled out the scale this morning and weighed them, #1 is 7g, #2 and #3 are 8g. Probably downright porcine, but this is about fun, and I really hope to have them fly away.

Every time I look at them, I giggle a little bit. A bunch of Lunchboxes ... haha!

(the pic of all 3 ... they look a bit wonky, I think it's because they're sitting on a soft futon and are all slightly askew from one another ...)

-Dave
Attached files Thumbnail(s):
Lunchbox HLG
Lunchbox HLG
Lunchbox HLG
Lunchbox HLG
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OZPAF
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« Reply #1 on: June 25, 2020, 09:22:44 PM »

Very colourful little beasts Dosco.

Happy flying
John
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flyfac
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« Reply #2 on: June 25, 2020, 11:51:46 PM »

Lovely builds. 

The Lunchbox was the first hlg I ever built.  I may still have the original blue line mimeograph plan for it somewhere.

Best,

Scot Dobberfuhl
Forest Grove, OR
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dosco
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« Reply #3 on: June 26, 2020, 11:17:25 AM »

Just returned from the local elementary school. Sunny and warm. I had #1 and #2 with me, #3 remained at home.

Had to add a small touch of clay to the nose of both to handle the choppy air. #2 flies in nice left-hand circles of about 10' diameter. Several flights it strayed over warm air and got some hang time.

#1 ... has issues. At first it tended to have a strong left turn and dive. I worked on setting some washin to the left panel ... helped a little. I took out the left rudder. Helped a bit. I took out the down elevator on the right panel. Had some good flights and bad flights, it was remarkably inconsistent. I played with the CG by adding and removing clay, it affected performance but the plane was still quite inconsistent. Hrrmmmm.

Of course the harder I throw, the worse they behave. So, lesson there is throw firmly but don't "try." Very Zen.

I can see maybe losing #2 in a thermal. I wished it a few times today, happily, but only got a little lift.

Will be interesting to observe #3's performance.

Had fun, though, which was great. Will try to get out earlier in the AM tomorrow to get some smoother air.

-Dave

 
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dosco
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« Reply #4 on: June 27, 2020, 11:47:56 AM »

I took the birds to a local sports field and chucked them around. It's pretty humid outside, and I arrived at the field around 10:15AM, so I was expecting some barely-suitable thermal conditions. As I chucked the beasties around, I was hitting small patches of lift here and there. Remembering the various Zaic articles I read when I was much younger, I was able to feel the air get still, warm up, and a cool breeze come in (signaling the thermal is detaching/moving away).

I decided to try and take a flight picture ... the requisite shabby "pictures with speck in the middle" are provided for your viewing pleasure (haha). Oddly on that flight, Murphy must have showed up to enforce his law of the universe. On that flight I hooked some good lift(!).

Arm started to hurt, decided "one more flight" and launched #3, which hooked a thermal (the best of the session). I wasn't timing the flight, but I was convinced for about a minute, as it gained altitude, that it was going to fulfill its purpose and fly away. Sadly, Hung decided not to take her, and she fell out of the lift.

Haha! Super fun time!!

Side note ... am guessing if that last flight was with a larger Zweibox, it may have flown away. Have to think about building the larger cousin ...

-Dave
Attached files Thumbnail(s):
Re: Lunchbox HLG
Re: Lunchbox HLG
Re: Lunchbox HLG
Re: Lunchbox HLG
Re: Lunchbox HLG
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dosco
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« Reply #5 on: July 18, 2020, 04:19:14 PM »

Just returned from throwing the Lunchboxes around. Caught some small/light lift on a few flights, was super fun.

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Re: Lunchbox HLG
Re: Lunchbox HLG
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OZPAF
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« Reply #6 on: July 18, 2020, 08:47:32 PM »

You are certainly getting your money's worth out of these little guys. Have you thought of converting them to catapult gliders? It's much easier on the arm Smiley

John
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dosco
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« Reply #7 on: July 18, 2020, 08:49:59 PM »

You are certainly getting your money's worth out of these little guys. Have you thought of converting them to catapult gliders? It's much easier on the arm Smiley

John

John:
The thought has occurred to me, however I'm in the midst of building some Zweiboxes ... I think the throwing practice is mildly helpful.

The Lunchboxes are so super fun! I'm hoping Hung will take one soon!

-Dave
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dosco
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« Reply #8 on: July 18, 2020, 09:07:50 PM »

I have to say that I'm really impressed with the Lunchbox design. All 3 flew off the board, the only trim setting that I need to pay attention to is the washin on the left wing. Otherwise the only other adjustment I've made is to the CG. It's remarkable that they fly so well(!).
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w_Tom
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« Reply #9 on: July 18, 2020, 10:15:42 PM »

They are a great plane and the catapult version BEAMSBOX can be found in the plan gallery. I have lost two to the treetops in small themas at the park.
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Re: Lunchbox HLG
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dosco
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« Reply #10 on: October 06, 2020, 01:12:13 PM »

So we've moved to Annapolis, the place is 1 block from the Naval Academy Stadium ... which has a very large verflow parking lot. Hyuge. I took a panoramic picture, I need to edit it because I can't email it or upload it to this forum.

Anyhow, found a good spot at 11:30 AM or so, warm and slightly breezy, although the thermal infill breezes were quite strong.

Tossed them around a bit, I think I hit the edge of a couple of thermals because the poor little planes got tossed and flipped around and then promptly circled for a landing.

Finally, I threw #2 as it felt like a thermal might be breaking loose. Up up and away! I watched her circle and gain altitude as it drifted towards the Stadium(!!). Hung took her! Last saw her drifting eastwards in circles ... there's a good chance she may have landed on the Academy grounds(!).

I'm not sure what to think about her gliding characteristics, as she was getting hammered in the thermal. Lots of rolling, stalling, and aerobatics.

This was the first time I've lost a FF plane to Hung. Fun! Have to build #4 (I need to setup my workbench in the basement!).

-Dave
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flydean1
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« Reply #11 on: October 06, 2020, 05:26:22 PM »

If you had your name and address, the NavCad Cadets might pay you a visit.  Socially, of course.
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dosco
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« Reply #12 on: October 06, 2020, 05:36:55 PM »

If you had your name and address, the NavCad Cadets might pay you a visit.  Socially, of course.

But of course.  Wink

Haha, the thought occurred to me.

I purposefully left my info *off* of the Lunchboxes ... in today's day and age, you never know how people will react to those sorts of things ... which is an unfortunate commentary on our culture. Sigh.

All joking aside, I can't be losing a stream of gliders, as I imagine that may catch up to me (in a negative sort of way). Maybe need to build bigger birds with RDT or maybe just fly R/C.

-Dave
 
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OZPAF
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« Reply #13 on: October 06, 2020, 06:20:33 PM »

Well that's a sign of success Dave! Smiley. I have lost a few of my 12"WS CLG's in the last few years - I now try to avoid thermally active conditions - late evenings usually with light winds.

I have still to build one of mine with a timer/DT. I think a viscous damper version would save a  lot of chuckies but would still require about a 18" min WS. The largest version of mine that I used for HLG, was 21"WS and it was very competitive but perhaps a bit too big for a CLG.

Good to hear that you have settled in your new home.

John
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flydean1
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« Reply #14 on: October 06, 2020, 09:28:27 PM »

14 - 16 inches works with Stan Buddenbohm's Tumbling Pigeon DT.  All the weight is forward of the CG.  Many times no nose weight is needed.  They come out pretty light.  I will be building a new fleet this Fall/Winter.
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OZPAF
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« Reply #15 on: October 07, 2020, 07:50:14 PM »

That's interesting thanks Flydean.

John
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dosco
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« Reply #16 on: October 08, 2020, 07:32:23 AM »

14 - 16 inches works with Stan Buddenbohm's Tumbling Pigeon DT.  All the weight is forward of the CG.  Many times no nose weight is needed.  They come out pretty light.  I will be building a new fleet this Fall/Winter.

Tumbling Pigeon DT?

Where would one find more info about this setup? (I'm familiar with Stan, but I'm only loosely coupled to organized FF such as NFFS, etc.)

-Dave
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Sailaway
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« Reply #17 on: October 08, 2020, 11:31:53 AM »

Perhaps helpful


https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=24873.0
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dosco
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« Reply #18 on: October 08, 2020, 02:10:20 PM »

Ah, very good.

Thank you for the URL!

-Dave
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