Night Hawk (oz522)


Night Hawk - plan thumbnail image

About this Plan

Night Hawk. Gull-wing sailplane by Frank Ehling, from Model Airplane News, May, 1945.

Quote: "Lost your glider to thermals? Then avoid them by flying this high performance soarer at night. Night Hawk, by Frankk Ehling.

FLYING by night is not new, but when flying by day means there is a chance of losing our model we stop and think. That was how the 'Night Hawk' was born. This ship will fly as well at night as any during the day. However, here where this model was built, daytime thermals are as strong as any we ever witnessed - and as there is still a shortage of balsa we thought twice before we flew her even at night.

We soon found our fears in vain. The gull dihedral works well but is harder to adjust than the conventional dihedral. While flying at night there is less wind so a beginner has a greater chance of getting her in the air. The ship has a real flat glide and can be flown without having to chase it all over the countryside to recover her once she is on her own. She can be adjusted to fly in circles and land very near the takeoff spot. (This ought to induce anyone to build her.)

Balsa was used in the construction, but pine can be used successfully if all parts are reduced in size. The wing and stabilizer plan along with the rudder should be drawn to the required size. This is all that will be needed.

FUSELAGE: Cut the formers to size and notch. Then take two 1/4 in squares and cement together at one end. Measure from the end of the fuselage and see where the first former will be located. Cement in place and continue forward to the nose of the ship until all are in posi-tion. Now cut the keel to shape and cement in place. This should be done while the fuselage is still on the table as that will align the lower part so as to get a perfect job.

When the lower formers are all cemented in place and dry, the top formers should be added. The stringers are now joined. The nose block should be added and carved to shape, after which which it should be sanded well and doped. Take a pencil and wrap a piece of sandpaper around it and sand out the former between the stringers. This will afford a smooth covering job and the formers will not protrude.

WING: Since the plans have to be drawn up this should be done first. The ribs are now cut to shape as explained on the plans. Simply place one rib tem-plate over the other and mark the lower one to the required length. Slide the template down until the upper edge of the rib coincides to the mark at the lower edge of the rib..."

Update 18/01/2019: Added article, thanks to RFJ.

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

Night Hawk - completed model photo



Do you have a photo you'd like to submit for this page? Then email

User comments

No comments yet for this plan. Got something to say about this one?
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, 2011-2019.

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.