Curtiss JN-4D Jenny (oz4767)
About this Plan
Curtiss JN-4D Jenny. Radio control scale model. For .29 to .49 power.
Direct submission to Outerzone.
Planfile includes build instructions.
Quote: "GENERAL NOTES
ENGINE: A .35 or .40 is recomended. If a .29 is used it must have good power and the Jenny must be kept light (4 lb complete, less radio).
BALANCE POINT: On the first flight, balance 1/8 to 1/4 in ahead of point shown.
DOWNTHRUST: Engine muht be at 6° downthrust.
CONTROLS: All control surface movement must be as shown.
INCIDENCE: Both wings and stab must be at 0 incidence.
TURNBUCKLES: Turnbuckles must be safely wired.
GLUE: It is recommended that epoxy be used throughout .
CONSTRUCTION NOTES: The construction notes below do not cover any standard building practice, only the unusual or different points of the Jenny. Read construction notes and study plans until all details are understood.
Fuselage: Keep fuselage from balance point aft as light as possible. If a .29 or .35 engine is used it is suggested that the X bracing be replaced with fishline and the tailskid be moiunted permanentlr. Note that nose build is in two pieces, see front wiew. Be sure to build one right and one left side.
Do not install bottom plywood (between gear struts) as this area must be open to install aileron servo mounts, see setup. Clamp both 3/16 x 3/8 bass uprights together to drill 1/8 dia hole for control linkage, leave one upright out until fuselage is assembled and control linkage is ready to install.
Tail Surfaces: Form rudder and elevator trailing edgeh and stab leading edge as shown in detail 'B'. Do not eliminate gussets as they are necessary. Keep tail surface as light as possible.
Wings: Note Location of interplane struts for flying models on lower wing plan. Leave wingtip skids off until after setup. If drag bracing is desired, drill two 3/32 dia holes in each rib 1/4 in up from bottom at location shown..."
Update 14/5/2023: Added engineering change sheets, thanks to Mark Snowden.
Quote: "Hello Outerzone Admin, Please add these pdf files: 2 engineering change sheets to the Curtiss JN-4 Jenny 66 in plans by Joy Products. It goes with plan oz4767. The updated sheets were in the kit that I recently purchased. The kit was first made in 1971, so the pages have yellowed. Mark"
Supplementary file notes
Engineering change sheets.
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(oz4767)
Curtiss JN-4D Jenny
from Joy Products
1971
66in span
Scale IC R/C Biplane Civil Kit
clean :)
all formers complete :)
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Submitted: 19/08/2013
Filesize: 1647KB
Format: • PDFbitmap
Credit*: JJ, MarkSnowden
Downloads: 5153
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ScaleType: This (oz4767) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.
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User comments
Hi Steve, Have found your wonderful site to be a treasure trove of plans and information. The article is not complete for this plan. Regards,LarryColeman - 15/01/2015
Quotes from Joe Vermillion: In 1946 Paul Shultz started Joy Products. Among stamped gaskets and other small manufactured metal parts he also produced some 1/2A control line models and started selling balsa wood mail order. In 1968 Ron Busch purchased Joy Products and renamed it Balsa USA. … Walt Mocha was connected to Aerodrome, his Joy Products Jenni [sic] is in Academy of Model Aeronautics National Museum. (2-22-22)
Vermillion put a concern to rest. He said the 3/32” width ribs in the kit should work okay even though the plans called for 1/16” width ribs.
“A lot of times the wood got changed,” Joe explained in a text, “but they never updated the manuals or parts lists.” This helped. The remaining Joy Products Jenny kit pieces have long sheets of 3/32” and 1/16” thick balsa. (5-10-23)
Mark Snowden - 13/05/2023
Nice job updating the Jenny today. Thank you. Some notes on converting the Jenny to electric:
800KV Brushless Motor.
35A ESC.
11x7e inch Propeller.
2 Servos - 37g.
2 Servos - 17g - in wings optional.
Mark Snowden - 15/05/2023
Photos of my Joy Products Curtiss JN-4D Jenny [main pic, 008].
Glenn Albrecht - 03/07/2023
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- Curtiss JN-4D Jenny (oz4767)
- Plan File Filesize: 1647KB Filename: Curtiss_JN-4D_Jenny_oz4767.pdf
- Supplement Filesize: 541KB Filename: Curtiss_JN-4D_Jenny_oz4767_engineering_change_sheets.pdf
- help with downloads
Notes
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
Scaling
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
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