I just finished Dayton R6 after a succesful run with Revision five. Revision six has

• less parts,
• a slanted toothpick (20 degrees),
• some unique shapes so there is only one way to assemble and
• laser vector labeling.

The slanted toothpick doesn’t look very slanted in the assembled picture but on the parts-cut you can see the angle near the number “8”.

The vector labeling goes on very fast. It took a few tries to get the power right but it’s definitely very functional.

There were 6 kids in the Dayton Free Flight workshop yesterday.

Everything went very well. Kids and parents had fun. I had fun too! I’m really enjoying this project since they fly nicely and is so easy to make. It’s easy to direct others to make as well.

I made a Dayton just before the workshop so I could show the kids what they were making and demo it while they were working. I find this is necessary in a workshop environment if the kids are new at it.

The revision 5 Dayton performed extremely well. By the way, that’s laser revision 5. There were four or five non laser prototypes before I started doing batches on the laser.

Here are a few points on the technical side:

1. My favorite thing was the flexibility of the flying surfaces. The planes were able to tolerate a fair amount of bumping and rough handling. The wing and tail surfaces would just wobble and bounce around and the integrity of the structure stayed intact. I think I found a sweet spot for the right amount of flex and rigidity.
2. The round corners of the winglets and tailplanes didn’t catch on things so I believe that contributed to survival of the planes with children.
3. Some of the kids forgot to cap the toothpick (rear motor hangar). I noticed it but made a conscious decision to not correct it and see what happened. No problems came forward despite short glue dry time and high humidity. So I may drop the step. Even without the cap it is considerably stronger than the Squirrel since it is supported on three sides (vs. two sides for the Squirrel).
4. I forgot to add the motor stick triplers where the tape holds the wing. Again I noticed this later and decided to proceed without it. No problems came forward so I will look at dropping this. The challenge here is that a narrower motor stick means a narrower wing mount. So this needs to be studied.
5. In this revision the wing is a little further back. I think it could be even further back and will try that. In this position a slight amount of down elevator is required and it’s very floaty and slow.
6. This batch of Daytons was made from heavier wood. That seemed to be okay as far as wing loading.
7. The planes were able to rise of ground (ROG).
8. Out of the box they stall a bit and recover instantaneously. I rather like this as the default behavior.  Some of the kids put the wing further back. This works well if the elevator is adjusted.

I just finished a revision with a collection of improvements for the Dayton project.

There is an improvement missing (slanted toothpick from Richard). That should be in revision 6. This was initially in the Squirrel project but it was rejected since it made the instructions more complex. But with Dayton that may not apply since the parts are laser cut. I suspect the slanted toothpick may make it through testing so watch for revision 6 to see how it gels in the test environment.

Tomorrow I’m mainly testing a new version of the motorstick and the wing. Some issues with the wing come forward in high humidity. That’s still in the works so if we have high humidity I’ll use an alternate wing so we won’t disrupt the motor stick test.

There are eight 12 year old kids in the test tomorrow.

I look forward to reporting what comes forward.

This evening I finished another revision of the Dayton. I made the motor stick thicker and moved the thin part further back.  I made the tailplane spar thinner. Few other small things. If all goes well, tomorrow (Thursday) I will make one at the pub!