The plan shows virtually everything, but you will have to draw up most of the ribs yourself. The shape of the root rib is given, and you can measure the height of the others from the front view, so this should be enough to work with. The sketches indicate that all ribs were flat-bottomed, with no reflex built-in.
The original plan had quite a lot of marks on it, and some dark areas, so I have spent some time cleaning it up. It will print onto 8 pages of A4 or similar sized paper.
Good luck!
Download Delta 16 pdf file here (184 KB)
Download Delta 16 bmp files here (261 KB)
Jim Millisky from Blackwood, New Jersey, USA is the first to send me photos of a finished Delta 16. He says he really enjoyed building the model and it went together nicely. Here are his comments:
"I covered the model with silver tissue and made a canopy for it.The silver tissue proved to be very tricky to cover with, as you can see by some wrinkles in the covering. The finished weight of the model was 18 grams, but test glides have shown it to be nose heavy with a plastic prop, so I will have to make a balsa prop.Properly balanced the model glided very fast, flat and stable. One modification I made was to enlarge the elevons to make it easier to adjust for flight. Hopefully some powered flights will happen in the spring."
Sidney Higgs has also built a Delta 16, and here is his nicely finished example. It has not been flown yet, and I will be more than interested to hear how it goes.
Goblin
Here is something a little simpler to build and fly than the Delta 16. The Goblin dates from 1950
(so SAM legal), has a span of 24 inches and
was sold as a "junior duration" model. The construction could politely be described as "sturdy", but
I guess this was to help it survive the rigours of trimming in inexperienced hands. Chris Strachan
built one for the SAM35 Gala a few years ago, when Frog models were featured and says it flew
surprisingly well. In fact it defeated all the Sprites that were entered in the competition. I think it would
make a fine windy weather model.
Many thanks to Chris Strachan for sending me his original example of the plan to scan.
As a bonus, I can now offer a pdf file with parts for the Goblin, including all the wing ribs. This was drawn up by Bill Brown, who was kind enough to send me a copy. Thanks Bill!
Download Goblin pdf file here (291 KB)
Download Goblin bmp files here (325 KB)
Download Goblin parts file here (20 KB)
Sprite
Another nice little two-footer, this time dating from 1949. Like the Goblin, it was sold as a "junior
duration" model and is also SAM legal.
Looks like it should be a good flyer, though there is not as much room for piling in the rubber as
the Goblin. It should come out rather lighter though.
Should you build one, photos and flying reports would be most welcome.
There are 12 pages to assemble, as the plan is quite large. You may be better
just taping together the bits for each part of the model as you build it, rather than
trying to get all 12 sheets perfectly lined up. I taped up a test plan to check it and
it worked fairly well, though it is hard to avoid vertical drift as you put in the
last corner sheets!
Download Sprite pdf file here (222 KB)
Download Sprite bmp files here (327 KB)
Many thanks to Bill Brown for sending this photo of his very smart Sprite, completed May 2005. I will let you know how it goes, as I am bound
to see it in action at Old Warden or Peterborough. It only weighs 25 grams without rubber, so I think he had better hang onto it if there are thermals around.
Bryan Stichbury has also built a Sprite, and has made a very nice job of it. and I took this photo at Old Warden while he was giving the model its first test flights.
Fawn
The 22 inch span Fawn was issued in 1959 as a sports model, and was only produced until 1962, so the chances
of finding an original kit would I think be quite slim. No matter, because you can build one now from the plan here. It is
a simple design, so even a beginner should have no problem constructing the model, and it certainly looks like it should fly well.
I have drawn up part sheets myself, so would like to know if anyone has any fit problems. The wing ribs do look rather fat,
but they are in agreement with the front view of the wing on the plan.
One construction point to watch is that the 1/16" sheet parts labelled 1, 2 and 3
are pinned to the building board during construction of the first 3/32" thick fuselage half. However, when building the opposite half on top of
the first one, the new 1/16" sheet pieces are packed with scrap 1/16" balsa underneath to bring them up flush to the upper face of the second fuselage half.
Quite clever really, and it saved Frog having to put any 3/32" sheet in the kit.
I was delighted to get this picture from Mark Massingill in the USA of his completed Fawn.
Mark reported that the parts all fitted well (always a relief!) and the model has flown successfully. The model is covered in yellow domestic tissue, with the lettering and logos
printed onto the tissue using an ink jet printer. Very smart it looks too.
The plan is on 8 A4 sized sheets, plus two parts sheets, in both bitmap and pdf format.
The plan was scanned at 150 dpi and the small bitmaps are all 1000 pixels wide, so to print out full
size you need to set the print width to 6.67 inches (1000/150).
I have also provided the plan as one large sheet in bitmap format, in case you feel like tiling it yourself
Download Fawn pdf file here (252 KB)
Download Fawn plan as tiled bmp files (zipped) here (366 KB)
Download Fawn plan as single bmp file (zipped) here (240 KB)
General notes on printing the plans
The small T shaped marks you will see on the sheets are spaced 50 mm apart, to help you get the pages the correct size.
The pdf files should print off at exactly full size if you set your printer to A4 paper.
This should work even if you
do not have A4 paper in the printer, as the margins have been left deliberately large.
You will need Acrobat reader to view the pdf files, which is a free download from
the Adobe web site
Bitmap files are also provided in case you prefer to work with those.
Back to home page
Back to Frog Senior Series plans
Back to Senior Series photo gallery
Back to rubber powered scale plans
On to Frog Junior Series plans
On to Frog Junior Series scale plans
On to Frog glider plans
On to the 1960 catalogue page
On to the Wilmot Mansour Commemorative Exhibition report
On to the links page
Looks like it should be a good flyer, though there is not as much room for piling in the rubber as the Goblin. It should come out rather lighter though.
Should you build one, photos and flying reports would be most welcome.
There are 12 pages to assemble, as the plan is quite large. You may be better just taping together the bits for each part of the model as you build it, rather than trying to get all 12 sheets perfectly lined up. I taped up a test plan to check it and it worked fairly well, though it is hard to avoid vertical drift as you put in the last corner sheets!
Download Sprite pdf file here (222 KB)
Download Sprite bmp files here (327 KB)
Many thanks to Bill Brown for sending this photo of his very smart Sprite, completed May 2005. I will let you know how it goes, as I am bound to see it in action at Old Warden or Peterborough. It only weighs 25 grams without rubber, so I think he had better hang onto it if there are thermals around.
Bryan Stichbury has also built a Sprite, and has made a very nice job of it. and I took this photo at Old Warden while he was giving the model its first test flights.