Straight Arrow (oz8794)

 

Straight Arrow (oz8794) by Hank Stumpf from Model Aviation 1980 - plan thumbnail

About this Plan

Straight Arrow. Radio control pattern ship for 1/2A power. Uses the Ace foam wing.

Quote: "Tired of look-alike 1/2A aerobatic jobs? Grouchy over the cost of everything? With neutral stability, this exotic 24 oz, 3-channel bird performs advanced maneouvers with unusual precision - and gets 15 to 20 minutes on a 2oz tank. But it's not for the beginning pilot.

Combining a swept-back wing and tail, and adding a throttle-equipped engine and tripod gear. Straight Arrow is, in Hank's eyes, a second generation of 1/2A stunters. We'll buy that!

WHEN the Ace Pacer (oz7186) was introduced, it revolutionized 1/2A flying by providing for the first time pattern ship appearance and performance. Since then it has been imitated by numerous designs similar in appearance and capability.

The Straight Arrow is not more of the same. It is the next generation in 1/2A pattern flying, combining swept back wing and tail, tripod landing gear and throttle-equipped engine.

As you can see, in addition to sweep back, the wing has anhedral. This is required to cancel out the aerodynamic dihedral effect of the swept back wing and, incidentally, has the desirable result of making the tip-mounted wheel struts shorter. The result is a plane with neutral stability and flight characteristics similar to the Pacer.

The availability of micro miniature radio flight packs, such as the Litco Systems and Ace RC equipment, makes the three-channel setup pos-sible with a total airplane weight of only 24 ounces. If you desire, rudder and nose wheel steering could be added for one more ounce to make your Straight Arrow full-house.

Similarly, there is a group of throttles now available for Cox TD engines. In order of cost they are Hiscott, $16.95 (includes muffler), Tarno, $12.95, and the Ace Throttle Sleeve, $2.50. A Hiscott was used because it includes a muffler and noise abatement is very important in our field. This unit does reduce engine power somewhat, so if you want a throttle with almost zero power loss use the Ace Sleeve. I have also tried this unit and found a noticeable improve-ment in airplane speed and climb rate.

Wing: Foam cores are Ace part no: 13L207 wing kit, $4.75. These cores are joined at the center by two 1/8 ply carry-through spars which establish both wing sweep and anhedral angle. The constant-chord foam section must be sawed into six pieces at the correct angles to form the center section which is the heart of the wing..."

Straight Arrow, Model Aviation, July 1980.

Direct submission to Outerzone.

Supplementary file notes

Article pages, thanks to RFJ.

Corrections?

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

Straight Arrow (oz8794) by Hank Stumpf from Model Aviation 1980 - model pic

Datafile:
  • (oz8794)
    Straight Arrow
    by Hank Stumpf
    from Model Aviation
    July 1980 
    42in span
    IC R/C LowWing
    all formers complete :)
    got article :)
  • Submitted: 29/05/2017
    Filesize: 466KB
    Format: • PDFbitmap
    Credit*: Circlip, RFJ

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

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment

 

 
 

Download File(s):
 

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.

 

Terms of Use

© Outerzone, 2011-2019.

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.