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Author Topic: Bungee Launch 36" Gliders  (Read 25526 times)
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LASTWOODSMAN
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« Reply #350 on: June 23, 2018, 03:28:13 PM »

Hi Pete - you guys are getting me hooked on the FROG GLIDERS,  and I am really enjoying gliders in general.

   LIST OF FROG GLIDERS in increasing size and numerical order of the pics.

1     20"     Junior  (Sailplane )
2     25"     Wren  ( twin rudder)
3     27"     Slingsby Skylark  -  my favorite
4     30"     Vespa
5     33"     Petrel
6     36"     Diana

LASTWOODSMAN
Richard

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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
FLYBOY49
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« Reply #351 on: June 23, 2018, 07:07:43 PM »

I've built 2 Wrens.  The 1st one went up in smoke when my cabin burned down a couple years ago.  But, I have another one hanging in my building room.

Both have been to Boulder City for a SAM CHAMPS contest.

I also have another laser cut kit and plans from Bob Holman and Jim O'Reilly.  So, I can build a 3rd one soon.

Van...
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OZPAF
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« Reply #352 on: June 24, 2018, 08:15:05 AM »

The Diana looks clean and well proportioned to my eyes anyway.

John
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Pete Fardell
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« Reply #353 on: June 24, 2018, 09:36:58 AM »

Thanks for posting the FROG collection like that, Richard. They all look nice but for me the Petrel is still the prettiest, mainly due to the slender fus. and tip dihedral I think.
Anyway, I have now covered mine using whatever was handy in my tissue box. Co-incidentally it matches the flowers in our garden quite well! The yellow is the stuff which came with my recent Eindecker kit, so I'm glad I saved it for this instead.

The plan says to acetate the top and triangular side bays just in front of the wing to make a window. I'm not sure about this though. It's not a scale model and I think it might look smarter just to leave that area tissue covered. What do people think?

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PeeTee
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« Reply #354 on: June 24, 2018, 09:51:48 AM »

Hello Pete, I'd leave it as it is, it looks pretty good to me!
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Indoorflyer
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« Reply #355 on: June 24, 2018, 10:28:19 AM »

I agree with you and PeeTee.  Glazing would be superfluous.
Nice pics indeed.
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FLYBOY49
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« Reply #356 on: June 24, 2018, 10:38:50 AM »

I, too like it as is.   Great job!

But, if'n anybody gives you a convincing argument about having windowz, just overlay this tissue with black or blue tissue and maybe add a paper cutout of a pilots head.

Or, another way is to carefully add 'em with a magic marker.

Van...
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Crabby
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« Reply #357 on: June 24, 2018, 10:44:35 AM »

Don't do it Pete, remember, the trick is knowing when to stop don't "gild the lilly"
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LASTWOODSMAN
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« Reply #358 on: June 24, 2018, 11:57:48 AM »

Hi Pete - beautiful pics, excellent 36" PETREL Glider !    Cool    I also agree - it looks perfect as is.    Shocked Shocked

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Richard
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« Reply #359 on: June 24, 2018, 01:46:53 PM »

Agreed - leave it 'as is'

Nice lawn ......
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TheLurker
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« Reply #360 on: June 24, 2018, 02:18:38 PM »

Quote from: applehoney
Agreed - leave it 'as is'
Nice lawn ......
+1 on both counts. I'm very jealous of Pete's test glide area.
If real life doesn't get in the way I hope to see the Petrel for real at Port Meadow next weekend.
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OZPAF
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« Reply #361 on: June 24, 2018, 07:55:23 PM »

Definitely leave it as it is Pete. Nice effort. Now set up the DT and go fly it Smiley

John
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Pete Fardell
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« Reply #362 on: July 01, 2018, 06:25:51 PM »

Thanks to all who suggested bungee/high-start launching post wing rebuild for the Swallow; works a treat.   Had a very pleasant morning at the Oxford Club's FF rally on Port Meadow today and, after some modifications to the hook suggested by David H. who was up from Chichester, got three (by my lights) very good bungee launched flights out it, a couple in the 30s+ region and one somewhere around about a minute in some really rather awkward wind conditions. 

Also nice to meet Pete Fardell who was there with his Petrel.

Very good to meet you too, Lurks! And big thanks for your help today. That 30 second flight you timed for me was easily my best of the day. Even so, I still sneaked third by default (and this nice little trophy!) largely thanks to you electing not to hand in your own superior times- so thanks for that too! I also learned a lot from from Dave Etherton who helped me mess with it some more after lunch. I think my problems getting it to come off the line were largely due to the rubber band which held the AR line not coming off the tow hook and so keeping the tow ring on there too. He said I should really use a metal ring after the rubber band for the AR line so that it slips off the tow hook metal to metal, so that's what I'll do next time. There were other useful little tips he gave me too, probably obvious to all you non-newbies in the glider game, such as waiting for the wind to pick up before releasing. The exact opposite of scale flying!
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LASTWOODSMAN
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« Reply #363 on: July 01, 2018, 09:07:41 PM »

Congrats on that nice little trophy Pete !   Cheesy

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Richard
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OH, I HAVE SLIPPED THE SURLY BONDS OF EARTH ... UP, UP THE LONG DELIRIOUS BURNING BLUE ... SUNWARD I'VE CLIMBED AND JOINED THE TUMBLING MIRTH OF SUN-SPLIT CLOUDS ...
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« Reply #364 on: July 02, 2018, 06:37:43 AM »

Hi Pete
I watched your flights after lunch and I'm inclined to agree with Dave. He flies at Beaulieu,usually gliders, and his advice is good!

Peter
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Pete Fardell
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« Reply #365 on: July 02, 2018, 07:22:36 AM »

Thanks Peter- I was very glad of his help and advice, and shall proceed accordingly. Hopefully I'll soon have the pleasure of walking miles in the hot sun to fetch my model and maybe even not finding it for hours!  Grin
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skycafe
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« Reply #366 on: July 02, 2018, 10:04:01 AM »

...I'll soon have the pleasure of walking miles in the hot sun to fetch my model and maybe even not finding it for hours!  Grin

By golly, it is the definition of free flight!
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TheLurker
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« Reply #367 on: July 02, 2018, 01:51:34 PM »

Quote from: TheLurker
... after some modifications to the hook suggested by David H. who was up from Chichester...
...thanks for your help today.

...I also learned a lot from from Dave Etherton...
Having received a great deal of help from others I'm pleased I was able to offer even a little help.  And it was Dave E who very kindly helped me out as well not Dave H.  Blame my poor heat-addled brain for that mistake.

Quote from: Pete Fardell
...I still sneaked third by default...
No, no, noo.  That place was achieved fair and square.   I didn't nominate any of my flights for timing so that trophy is rightfully yours. I also meant to say yesterday before I shot off the flights that I saw your Petrel make were beautifully stable and it looks even better IRL than it does in its publicity stills upthread.

Quote from: Pete Fardell
I'll soon have the pleasure of walking miles in the hot sun...
Keeps you fit. Smiley

Many thanks to the Oxford bods for running the event.  I had a great time.
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OZPAF
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« Reply #368 on: July 02, 2018, 08:52:07 PM »

Good one Peter - now you can go and get fit!

John
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Indoorflyer
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« Reply #369 on: July 05, 2018, 12:28:22 AM »

I think it worked!   Top secret photo of Pete F practicing for the next level of bungee launch gliders!  (from San Diego Air and Space Museum, no known copyright restrictions)     It's very easy to spend way too much time browsing the SDASM online photo albums...

HERE
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Pete Fardell
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« Reply #370 on: July 05, 2018, 01:50:22 AM »

You know how it is- you're only trying to fix a loose strut, but suddenly get CA all over your fingers...
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Indoorflyer
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« Reply #371 on: July 05, 2018, 02:23:21 AM »

 Cheesy
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TheLurker
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« Reply #372 on: July 08, 2018, 06:29:14 AM »

Anyone got any suggestions, explanations or even cures for "sideways" tows?

Most of the time the Swallow tracks straight and level and lets go of the tow cleanly into a level flight, but sometimes it'll veer, always port, with a distinct bank and come off the line at a nasty nose down angle into a horrible stally, tight turning, flight from which it never really recovers.  These flights are horrid to watch and nearly always end in a harder (nose first) landing than I'd like.   Next flight out will be fine.  Puzzled and concerned by this.   It's not a problem on long grass, but the Lurker Industries Aerodrome has been mowed and is now doing a passable imitation of concrete at the moment.

Launches are into wind and, because I'm on a small field, I wait for light breeze to calm before letting go; I don't want it going too far down-range. 

I assume the problem is trimming issues with the model because the wind direction today was reasonably steady, certainly no wild backing or veering into a side-wind and I still got a handful of bad launches.
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OZPAF
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« Reply #373 on: July 08, 2018, 06:56:00 AM »

It may possibly be the result of a towhook a little too far aft - ie too close to the CG and a slight cross wind launch.

John
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