Scary delta

[Mr Man]

Kinda what I figured 👍

 

[AIRFORGE]

NOTE TO EVERYONE:
We are all from different backgrounds/regions and we don't all speak the same language. Sometimes posts are misinterpreted by both the translator and reader. It is best to assume the comments mean well, not harm. Mods will take care of the harmful stuff.

SO... PLEASE be as respectful as possible when a post seems a bit "different".

Not a complaint, just a reminder for everyone, including myself, to...
REMAIN CALM AND AIRPLANE ON!

 

[AMMO193]

NOTE TO EVERYONE:
We are all from different backgrounds/regions and we don't all speak the same language. Sometimes posts are misinterpreted by both the translator and reader. It is best to assume the comments mean well, not harm. Mods will take care of the harmful stuff.

SO... PLEASE be as respectful as possible when a post seems a bit "different".

Not a complaint, just a reminder for everyone, including myself, to...
REMAIN CALM AND AIRPLANE ON!

Me will always rules be respected 😉

 

[Houndpup Rc]

Sounds like it was tail heavy....


That drawing looks awesome!!!!!

Yup, I had that with my Radjet! 😂

 

[Houndpup Rc]

NOTE TO EVERYONE:
We are all from different backgrounds/regions and we don't all speak the same language. Sometimes posts are misinterpreted by both the translator and reader. It is best to assume the comments mean well, not harm. Mods will take care of the harmful stuff.

SO... PLEASE be as respectful as possible when a post seems a bit "different".

Not a complaint, just a reminder for everyone, including myself, to...
REMAIN CALM AND AIRPLANE ON!

Roger

 

[Mr Man]

I forgot that he wasn’t from here, good point 👍

 

[L Edge]

Ammo193:
Another point that cause the dragon movement is that did you check if the motor/prop is perpendicular to the airframe in both axis? If not, use thin washers to correct.
Did you use ECalc to determine your CG as well as chucking it to see if it's close?

 

[AMMO193]

Another point that cause the dragon movement is that did you check if the motor/prop is perpendicular to the airframe in both axis? If not, use thin washers to correct.
Did you use ECalc to determine your CG as well as chucking it to see if it's close?

A picture is worth a thousand cookies:

No lush greenery where I live hence nothing to glide test on... I could've invested in a spare foam or polystyrene sheet and cut out the same planform for glide testing. Another huge goof would have to be the ridiculously oversized slot.... The only feasible thing to do is fill it with a foam cutout and convert it to a puller perhaps.

 

[telnar1236]

Dunno about tail heavy, but it definitely was stalling. If its bobbling, it is decently stable, typically one wingtip stalls before the other and it goes into an accelerated roll to inverted faster than an eye blink. Usually doesnt make back to flite as the ground interrupts the flight

I suspect what was happening was parts of it stalling while other parts kept flying - one my earliest designs from well before I started posting on here was like that - one moment it was flying well and the next it was out of control - technically flyable but not at all fun

 

[telnar1236]

Bad news folks; Disaster!
Way out of trim and way off balance, the way it bobbed up and down like a Chinese dragon....

Managed to land it safely, didn't bother trying again... got too disorientated after the maiden flight. I guess there's a reason they don't use props in slots in actual planes, it almost ruins the integrity and gets really bendy around that area. Oh well... Back to the drawing board, thinking about filling the slot and extending the nose to make some kind of edf jet like so:


View attachment 254358

That drawing looks amazing. A word of caution on cranked arrow deltas - they also can suffer from a shifting center of pressure so make sure to do a few chuck gliders before flying and to make sure they need to up trim to fly well and maintain a stable glide slope instead of bobbing. The less swept outboard portion will start stalling before the more swept inboard which makes the COP shift forwards

 

[Shurik-1960]

AMMO 193 .Sorry.I didn't mean to offend you. I gave a link to 600 models that actually fly. I don't believe you have much experience.: you made a huge hole under the propeller - it's unwise. Look at the design of other models, and if you don't understand where exactly, they will tell you. I use Google Translate, and sometimes I have to make a lot of edits. An example of talent is Julius Perdana.He's self-taught. His standard drawings are perfect. I'm not interested in your topic anymore.
P.S. The vertical tilt of the engine is zero degrees on all wings.

 

[Houndpup Rc]

AMMO 193 .Sorry.I didn't mean to offend you. I gave a link to 600 models that actually fly. I don't believe you have much experience.: you made a huge hole under the propeller - it's unwise. Look at the design of other models, and if you don't understand where exactly, they will tell you. I use Google Translate, and sometimes I have to make a lot of edits. An example of talent is Julius Perdana.He's self-taught. His standard drawings are perfect. I'm not interested in your topic anymore.
P.S. The vertical tilt of the engine is zero degrees on all wings.

People learn form experience and like to try new things....

 

[AMMO193]

AMMO 193 .Sorry.I didn't mean to offend you. I gave a link to 600 models that actually fly. I don't believe you have much experience.: you made a huge hole under the propeller - it's unwise. Look at the design of other models, and if you don't understand where exactly, they will tell you. I use Google Translate, and sometimes I have to make a lot of edits. An example of talent is Julius Perdana.He's self-taught. His standard drawings are perfect. I'm not interested in your topic anymore.
P.S. The vertical tilt of the engine is zero degrees on all wings.

OK no hard feelings 🤝

Yes these are the same links on
rc-plans.com and here's proof of what I got from there:

My take on the above design:

I wish I had videos to show but since I usually fly alone...

 

[Houndpup Rc]

OK no hard feelings 🤝

Yes these are the same links on
rc-plans.com and here's proof of what I got from there:

View attachment 254384

My take on the above design:
View attachment 254385

I wish I had videos to show but since I usually fly alone...

I like using a Gopro on top of my head

 

[AMMO193]

That drawing looks amazing. A word of caution on cranked arrow deltas - they also can suffer from a shifting center of pressure so make sure to do a few chuck gliders before flying and to make sure they need to up trim to fly well and maintain a stable glide slope instead of bobbing. The less swept outboard portion will start stalling before the more swept inboard which makes the COP shift forwards

Coolio Julio, as I mentioned I need to buy spare polystyrene sheets and cut out the planform to test glide 👍

 

[L Edge]

I suspect what was happening was parts of it stalling while other parts kept flying - one my earliest designs from well before I started posting on here was like that - one moment it was flying well and the next it was out of control - technically flyable but not at all fun

That's why when I see a new designer's plane it not stable to me if they don't show slow, fast turns, both directions, figure 8's, launches and landings. Just like you, you have a number of flights before you release your plans. Jets are sure good examples of flying well and then going haywire.

 

[Piotrsko]

Well, actually, for test glides and test plans, cardboard box sides work as generally direct interchanges, except for strength and waterproof. If you get it to work in cardboard, it works generally in other materials.

I see you prefer severe pointy and sweep designs

 

[AMMO193]

Well, actually, for test glides and test plans, cardboard box sides work as generally direct interchanges, except for strength and waterproof. If you get it to work in cardboard, it works generally in other materials.

I see you prefer severe pointy and sweep designs

I'm an avid wing enthusiast (mini arrow being an all time favourite). I've had lots of fellow club members complain that I never fly anything other than wings they beg me to build or try something consisting of tailplanes for a change.... I've only done it ONCE, Bloody Wonder! Here's me final take which is some kind of abomination-bastardized-spawn of the bloody wonder and old fogey fuselage (with kfm4 thrown in).

And yes, just like you they're noticing (with great concern 😉) that my wing sweepage has been gradually increasing and getting sharper.... Also with the occasional " your plane designs are getting a bit too sci-fi" from the club manager🤣🤣🤣

 

[AMMO193]

I like using a Gopro on top of my head

OK, what sweat resistant glue do you recommend using? 😉

Don't people usually use them for fpv recordings like on the versa wing/spear.... Filming from the ground usually needs lots of zooming and focusing in my experience

 

[Houndpup Rc]

OK, what sweat resistant glue do you recommend using? 😉

Don't people usually use them for fpv recordings like on the versa wing/spear.... Filming from the ground usually needs lots of zooming and focusing in my experience

That is true and that is why I have a Sony A6500 camera on the way (Has a REALLY fast auto focus) but some footage is better than none and if a gopro is all yo can get....(You can zoom a little in the editor too...It just loses some photo quality)