sailortrash said..jaumet said..utcminusfour said..
Welcome, Jaumet!
I am keen to learn and discuss, but I am not an expert on airfoil theory. I have picked up a little through school, work, and my own interest in foils, but this discussion may be slightly beyond my depth, so a couple of questions first.
Could you clarify how you define camber and reflex, and what distinguishes one from the other? I have heard reflex described as a convex hook (down) in the aft portion of the lower surface. In that description, it is related to the camber line but treated as a separate feature. You seem to be describing reflex as the aft portion of the section turning upward, or effectively moving the trailing edge up. Some clarifications of the nomenclature would help me a ton.
We also need to get you the ability to post pictures. I would really like to see two comparable sections, one with the stronger nose-down pitching moment and one with the subtle reflex that reduces it. I think seeing the difference would make this click for me. Maybe PM me the images and I can post them?
I think I found the Takeoff Technologies home page, but not the article you mentioned. Regardless, it looks like an amazing resource that was not on my radar. Thanks for posting!
Thanks
utcminusfour,
I am planning on doing more posts like this here,
Its nice to engage with the community, so hopefully I can get the ability to upload soon.
Meanwhile you can find the article with images here:
app.takeoff-technologies.com/community/blog
It makes it easier to follow
best,
Jaume
Wouldn’t an “auto” adjusting stabilizer be a good for the kind of foils we use (one mast, one wing, one stab)? On the water, i get the sense that a given AoA of the stab works well within a certain speed range, but ideally AoA would change with speed.
looks like you could support this open source project
jaumet said..utcminusfour said..
Welcome, Jaumet!
I am keen to learn and discuss, but I am not an expert on airfoil theory. I have picked up a little through school, work, and my own interest in foils, but this discussion may be slightly beyond my depth, so a couple of questions first.
Could you clarify how you define camber and reflex, and what distinguishes one from the other? I have heard reflex described as a convex hook (down) in the aft portion of the lower surface. In that description, it is related to the camber line but treated as a separate feature. You seem to be describing reflex as the aft portion of the section turning upward, or effectively moving the trailing edge up. Some clarifications of the nomenclature would help me a ton.
We also need to get you the ability to post pictures. I would really like to see two comparable sections, one with the stronger nose-down pitching moment and one with the subtle reflex that reduces it. I think seeing the difference would make this click for me. Maybe PM me the images and I can post them?
I think I found the Takeoff Technologies home page, but not the article you mentioned. Regardless, it looks like an amazing resource that was not on my radar. Thanks for posting!
Thanks
utcminusfour,
I am planning on doing more posts like this here,
Its nice to engage with the community, so hopefully I can get the ability to upload soon.
Meanwhile you can find the article with images here:
app.takeoff-technologies.com/community/blog
It makes it easier to follow
best,
Jaume
Looks like u could support this open source project!
3hxyqkzsskexg9sja54q3l.streamlit.app/ This is what aircraft do! They change the AoA of their Horizontal Tails depending on the speed and CG (fuel is burned over time).
Its just hard to manufacture at these small scales.
Unfortunately, I am quite busy devloping our Conceptual Design Tool.
