Hi Spy (oz2129)
About this Plan
Hi Spy. California contest model. Free flight power. Atwood engine shown.
Update 07/06/2021: Added article, thanks to akvose.
Quote: "From out of the west comes this ultra simple high-performance engine-in-wing pylon, by Hal Roth.
HI-SPY California Contest Plane. To win contests you've got to get up high - and do it often. Most conventional models entered in competition have plenty of potential climb but usually waste at least half of it doing loops, dangerous spins, fall-offs, stalls and other maneuvers better left for the control line stunt flyers.
Hi-Spy's best and smartest attribute is a grooved climb. The model climbs straight, no turn, no loop, no violent circles, no wasted power. Just up. Up at 75 degrees for the full 20 seconds of motor run. When the motor shuts off, the ship is high enough to glide for five minutes.
No fooling! Try this high engine pylon set-up. Take any pylon model you have and mount the fan up high and go set for yourself. Adjusted to climb straight. the ship ascends without any lost motion, using all the forward impetus to build up climbing speed. There is no looping or spinning tendency because the pro-peller slipstream (methinks) is above the pylon, fuselage side area, and rudder.
Hi-Spy is big for a Half-A model. The wing has 300 square inches of area, but don't try .099 engine; too powerful.
Complete construction details available on full-size plans."
Supplementary file notes
Planfile includes full build instructions.
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
by Hal Roth
from Air Trails
IC F/F Pylon
all formers complete :)
got article :)
Found online 29/12/2011 at:
Format: • PDFbitmap
Credit*: Ratracer, tri-pacer
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* 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.
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.
© Outerzone, 2011-2021.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.