Gym Dandy (
37 in. / 94 cm
)
RC Modeler's Gym DandyINDOOR R/C flying has always been a tantalizing thought. You know - sitting in your living room, with a little six inch job buzzing around at your command. Maybe we'll see it one day - in fact, we probably will, in some modified form not in existence. Meanwhile, we have to settle for what is currently available. And it's not too bad, either.Several years ago I published a design, called 'Warpy' (for obvious reasons) which was reasonably successful for that time. Since then, the .010 engine has been developed, transistorized receivers have improved, and most important, Hobby Poxy came into being. Why is Hobby Poxy most important? Simply because the structure of an indoor model must be very light, and therefore fragile. This is no prob-lem with a rubber powered job, but glow fuel requires that the model cov-ering be fuel proof. If you use dope, it pulls the model all out of shape (that's how Warpy got its name), but with Hobby Poxy you can make the structure as light as the air loads will require, since the application of Hobby Poxy won't shrink the tissue and subsequently warp the structure. Next, the .010 was a big step. The only problem is, it's too powerful, so you have to tame it down with an inefficient prop. 'Swamping' has been minimized by automatic volume control (AVC) circuits such as C&S's 'sensimatic' receivers. This is important in indoor flying because the model is frequently close to you, and swamping could cause it to 'zig' when you want it to 'zag!' Finally, the small 'Minitron' compound escapement by O.S. eliminates the sequence operation required by the simple "bing-bang" escapement. My prototype of the design shown here has a Bonner SN, and I have to admit that too often I would "bing" when I should have "banged," so a "Minitron" com-pound escapement has been utilized to solve that problem. Well, you still can't fly this design in your living room, but it's a real dandy for flying in a gymnasium - a Gym Dandy, in fact. So, build one up and get permission from the school principal to use the gym during some unscheduled periods. Light weight is essential to keep the flying speed down - the prototype weighed in at four ounces! You should try to match this, because it gives a flying speed of about five to six miles per hour, and at that speed, even if the model hits anything, the only damage is to the model itself, which is easily repairable. The engine is a pylon mounted pusher configuration. Thus it won't be likely to get the prop entangled with any obstacles in case the model does hit something. The relatively high dihedral and huge rudder area makes it possible to rack the model around in tight circles without immediately spiralling down. No landing gear is necessary. You hand launch, and with a little practice, you'll find you can fly it right to you and catch it in midair at the end of the flight. The structure is a straightforward box, spar, and tissue framework just like old time rubber models. The tissue should be ironed before applying so that it's pretty smooth (let it cool an hour or so after ironing so it's at room temperature when you attach it to the framework). The construction notes on the plans show all the required sizes of balsa; we don't have to go into it in any more detail, since it's self explanatory. Note the 'half size' pencells for receiver drain is small, and the O.S. escapement has a unique 'by-pass' feature that cuts the power requirement way down after the initial 'pull-in' power has been applied. Perhaps your biggest problem will be matching the .010 power to your plane. To do this, you need a very inefficient prop - otherwise the Gym Dandy will beat itself to pieces on the ceiling! I've shown a block from which you can carve a pusher prop, but you'll have to make a real 'club' blade in order to keep the thrust down. As a control device I've also shown a 'thrust reverser.' This is a little metal stub propeller with the blades twisted opposite to the main prop, thus counteracting the thrust. You can vary it by the amount of twist - even to the point of reducing the thrust to practically zero, even tho the engine is screaming. The amount of reverse thrust will depend on your particular plane, prop and engine combination. A couple of test flights will suffice for determining the necessary amount. Even if you don't have a gym available, you can amaze your friends with this lumbering model by flying it outdoors on windless days. No matter where you fly it, you'll get a kick out of it. So build a Gym Dandy, just for the novelty. You'll be glad you did! Link to this page: https://aerofred.com/details.php?image_id=97976 |
|
| Sources: | https://outerzone.co.uk/plan_details.asp?ID=7869 |
| Details: | Full Details |
| ID: | 97976 |
| File Size: | 121.4 KB |
| Type: | Airplane |
| Class: | Radio-Control |
| Use: | Sport |
| Motor: | Glow-Powered |
| Motor Size: | Less-Than-0.049-CI (2-strokes) |
| Wingspan: | 37 in. / 94 cm |
| Publisher: | RC Modeler |
| Magazines: | More at RCBookcase |
| Pub. Ref: | Draw by Gerardo Flores |
| Designer: | Ken Willard |
| Date: | 12/1966 |
| Weight Class: | 75g-To-100g (1.75oz-To-3.5oz) |
| Material: | Various-Wood-Types |
| Listing Editor: | André |
| Added: | 13/01/2017 16:15 |
| Updated: | 10/01/19 11:45:51pm |
| Corrections? | Contact André |
| Need Help? | Forum |
| Filetype: .pdf | Software for .pdf files |
Radio-Control Airplane Scale Outdoor Various-Wood-Types
Model designers made a invaluable work over time. However, due to lack of divulgation, several of his plans are being forgotten.
Through meticulous research at editing, is possible prevent this; keeping these projects alive, for future generations.
Please, contribute with this effort making a Pay Pal donation to me, in any value.
Thank you!
André.
Donate to André's Paypal account.
Because AeroFred.com is not just a site to grab some plans. We are a community of modelers from around the world sharing plans with each other, plans are stored on a user account, he will be able to control all the plan details, the plan comments, help others with building tips, provide hobby related services and even accept donations from other members. So, why not register?
There are lots of interesting site features and 24652 R/C plans available for download.
| Plan Attributes: Edit Attributes | |
| Plan ID: | 97976 |
| Keywords: | Indoor monochannel .010 stick construction vintage. |
| Class: | Radio-Control |
| Model Type: | Airplane |
| Channels: | 1-ch |
| Functions: | Rudder |
| Aircraft Use: | Sport |
| Wingspan: | 37 in. / 94 cm |
| Wingspan Class: | 75cm-To-100cm (30in-To-40in) |
| Wing Position: | High-Mounted-Wing |
| Wing Style: | Straight-Wing-Rect |
| Wing Dihedral: | Dihedral |
| Landing Gear: | None |
| Motor Type: | Glow-Powered |
| Motor Size: | Less-Than-0.049-CI (2-strokes) |
| Number of Motors: | 1-Tractor |
| Weight Class: | 75g-To-100g (1.75oz-To-3.5oz) |
| Material: | Various-Wood-Types |
| Construction Skills: | Novice |
| Pilot Skills: | Low-Intermediate |
| Publisher: | RC Modeler |
| Magazines: | More at RCBookcase |
| Date: | 12/1966 |
| Reference: | Draw by Gerardo Flores |
| Designer: | Ken Willard |
| Restorer: | Not identified |
| Category: | PDF Bitmap Wood Plans from American Companies |
| Similar: | Plans like Gym Dandy |
| File Details: | |
| Date: | 13/01/2017 16:15 |
| Views: | 3489 |
| Downloads: | 119 |
| Rating: | 1.00(1Votes) |
| File size: | 121.4 KB |
| File Details: | |
| Date: | 13/01/2017 16:15 |
| Views: | 3489 |
| Downloads: | 119 |
| Rating: | 1.00(1Votes) |
| File size: | 121.4 KB |
This calculator will work on pdf and image format files, if the file is very large, 5 or even 10 Mb it will take longer to process the plan file, it may finish even after the button animation stops spinning, please be patient when calculating larger files.
What are you ordering:
You are ordering a print from the main PDF file in this listing, it´s exactly like taking this file in a thumb drive to a local print shop and ask them to make a print.About the plan source:
You should verify if the source file has the quality for the type of construction you intend to do, we will print the file without any kind of enhancement or scaling. To know if the file is good please download it and open it on a pdf viewer like Adobe pdf viewer and set the view level or zoom level to 100% or 1:1 or full scale or actual size, depending on which version or pdf viewer you are using. Also, using the measuring tool make sure all the parts fit together and have the correct size.Plans Scaling:
We can scale this plan for you. But please keep in mind that if this plan is not vector, if you enlarge it too much the quality will be degraded.You will receive:
About our printers:
We use professional quality laser OCÉ and Canon printers/copiers, these printers use toner, not ink so the printings will be durable and waterproof.About the different media types:
Bond Paper: White Bond paper, 80 grams per square meter.Pricing:
We charge by print length (914mm or 91,4cm or 36in. by the length of the print)Packaging:
We will use paper or waxed paper padded envelopes for folded plans and hard cardboard tubes with plastic ends for rolled plans, depending on your choice.Shipping:
We ship from Portugal, Europe and use the reliable Portuguese mail system CTT.Postage:
We charge according to the ctt.pt postage table.Discount Coupons:
Discount coupons are valid from 3 to 30 days after purchase, you can use them any number of times you like but only once per item order.Returns:
Please keep in mind that when you order a plan it will be printed specifically for you, just like when you go to a local print shop.Payments:
Orders can be paid with Paypal or Credit Card via Paypal and are shipped to the address on your Paypal account or to the address you set at checkout.About the Calculator:
The Plans Price Calculator will read the plan file and output all the information on the panel to the right according to the selected options, you can change the options and request a new quote at any time.3D printing allow us to design not only complete airplane models but also parts to complete balsa, foam or even composite model airplanes.
Parts can be designed and printed to fit exactly a model you have or a model you plan to build, even if you are not building this model to the full size plan.
3D Printing, and 3D CAD allow us to create the actual parts to fit on our models but also allow us to create negative molds where we can make composite parts.
I´m adding this service to all the plan listings on the site knowing that not every part you imagine or need can be done, knowing this, jobs will be evaluated case by case and a price estimate will be given on request.
It is possible to design a complete model for you but keep in mind that this is a lengthy process, many hours are needed to design and test a fully 3D Printed model. The finished model cannot have the same internal structure of the wooden made counterpart because it wouldn´t be possible to print it, it would have to have a structure like the models you can see in the 3D Printed Kits section of the site.
From the outside they are very loyal to the plan but still they have to be printed in sections, typically to fit a 250X210X200 mm cube that is the printer maximum build volume.
3D Printed planes are also heavier than light balsa models, all built up and ready to fly, with an electric power system they are generally a little lighter than the same model if it were powered by a glow engine. Please have a look at the 3D Printed kits section to have an idea on this.
I will calculate a price upon request, please contact me here mentioning this PlanID: 97976 and the job you wish me to do.
| Name | Span | Class | Type | Use | Power | Publisher | Designer | Date |
| Dandy ID:80626 | 584.8 KB |
64.6 in. / 164 cm | Free-Flight | Sailplane | Sport | Not-Powered | Graupner | --- | 01/1968 |
| Dandy ID:98927 | 217.2 KB |
16.5 in. / 41.9 cm | Free-Flight | Airplane | Sport | Rubber-Band-Powered | Flying Aces. | Louis Garami | 04/1937 |
| Gym Dandy ID:97107 | 393.6 KB |
37 in. / 94 cm | Radio-Control | Glider | Trainer | Glow-Powered | RCModeler | Ken Willard | 01/1966 |
| GymDandy ID:81673 | 212.5 KB |
18 in. / 45.7 cm | Free-Flight | Airplane | Xperimental | Rubber-Band-Powered | --- | --- | --- |
AeroFred.com is a Plans Sharing Community, not just a website to grab some plans.
Every day thousands of modelers visit us and download free model airplane and boat plans, plans shared by other modelers...
If you have plans that are not here please upload them, so others can build from them.
Please login first
