Einzpfeil (oz12553)


Einzpfeil (oz12553) by Charlie Fite 2020 - plan thumbnail

About this Plan

Einzpfeil (Single Arrow). Radio control sport model for electric power with 70mm ducted fan.

Quote: "Steve, the Einzpfeil is the most successful and easiest to fly of all my flat jets. 27 in WS with a 70mm fan. It can be built in a day."

Direct submission to Outerzone.

Update 24/03/2021: Added article from FlugModell Apr 2021, thanks to Charlie. Note this is retrospective, the Einzpfeil plan was published first on Outerzone, and the printed article is later.

Quote: "I'm not one to toot his own horn, but the events of the last few months prompt me to share this with y'all. It started with a middle school teacher in Cologne, Germany that had scaled down one of my flat jets and converted it to a catapult launched glider. He sent me a video of his kids flinging the thing into the air on the school soccer field.....I was both amazed and gratified to see kids actually out playing, and not staring at their phone....One thing led to another, and FlugModell Magazine ended up featuring my little airplane in this months issue..Enjoy"

Quote: The Einzpfeil - The Rocket From Memphis. Why go far away when the good stuff is so close? Because there are also great things in the distance, for example the Delta Einzpfeil - it comes from overseas. FlugModell author Thomas Buchwald liked the model so much that he contacted the designer and one thing led to another.

Memphis in the US state of Tennessee is not only the epicenter of rock n roll, it is also home to creative model aircraft designers. One of them is Charlie Fite, a retired engineer, pilot and model airplane pilot by passion. His designs shine with minimalist construction, excellent flight characteristics and very interesting flight patterns. You can see them in the model flight forum RC-Groups: https://www.rcgroups.com/forums/member.php?u=451376.
Charlie's username here is Old_Pilot. There is also a Youtube channel from him: https://www.youtube.com/channel/UCzeGdsL-ZSMY_1K8E09zVXQ/videos.

Charlie has already successfully built and flown the single arrow presented here invarious sizes. For FlugModell he drew a version with 610 mm wingspan for 50 to 64mm diameter impellers and we built and flew it.

Concept: Charlie's idea was to build a ground-launchable impeller model with maximum top speed and minimum landing speed. A simple design with as few parts as possible was also in the specifications. He was inspired by MBB's Lampyridae stealth study from the 1980s. This influence is most evident in the triangular fuselage cross-section.

The model is made of 6-mm Depron, the wing has a Kline-Fogleman 2 airfoil and is reinforced with a CFRP tube or flat section. Ground takeoff capability is provided by two skids under the wing.

The model is designed to use a minimal number of components to create a lightweight yet strong structure. And the whole thing looks good, too.

Equipment: Suitable for propulsion are impellers with 50 to 64 mm diameter, powered by a LiPo in 3s version with 1,600 mAh or a 4s battery with 2,200 mAh capacity. Our model flies with a 50 mm impeller from FMS, 4s-LiPo with 1,600 mAh and a 45 A regulator. Only two servos from the 9- to 12-g class are needed. The transmitter only needs to have a delta mix function.

Since the whole model consists of only 13 parts, construction is easy and quick. You can tell that the parts were designed by an engineer and carefully refined - a minimum of material and build time is used to produce a strong and lightweight airframe.

Charlie Fite builds his models from Elmer's Foam, which is a paper-backed rigid foam. As Europeans, we have the advantage over our American model aviation friends of being able to easily obtain Depron, which makes the model much lighter. However, there are only a few differences in construction between the two materials. Here I describe the construction from Depron..."

Supplementary file notes



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

Einzpfeil (oz12553) by Charlie Fite 2020 - model pic

  • (oz12553)
    by Charlie Fite
    27in span
    Electric R/C LowWing
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 17/09/2020
    Filesize: 241KB
    Format: • PDFbitmap
    Credit*: CharlieFite
    Downloads: 1615

Einzpfeil (oz12553) by Charlie Fite 2020 - pic 003.jpg
Einzpfeil (oz12553) by Charlie Fite 2020 - pic 004.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

Many thanks to Victor for mailing in to point out there is a free plan available for download from: https://www.flugmodell-magazin.de/downl... of a slightly smaller version of the Einzipfeil at wingspan 610mm, for 60mm fan. It is a small but perhaps useful difference. The oz12553 planfile here is larger at wingspan 27 in (685mm), for 70mm fan. I think the German article text here in fact covers the smaller version. The drawings are almost the same.
SteveWMD - 14/01/2022
Add a comment



Download File(s):


* 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.


Terms of Use

© Outerzone, 2011-2024.

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.