FOAM BOARD HJK SPEEDWING DISCUSSION

[khuzaima]

My dear sir.....I am hosting the 2025 Speed challenge so it's my business to know! JK
No, actually yeah he did hit it and here's the video:

hey this is a radjet this isn't a homemade foamboard plane sooo.........

 

[khuzaima]

My dear sir.....I am hosting the 2025 Speed challenge so it's my business to know! JK
No, actually yeah he did hit it and here's the video:

Minecraft music in the background 🤣

 

[Mr Man]

Minecraft music in the background 🤣

?????

 

[Mr Man]

That’s “Someone To You” By Banners…

 

[Mr Man]

hey this is a radjet this isn't a homemade foamboard plane sooo.........

Yes yes, but It’s FOAM.

 

[Mr Man]

Yes yes, but It’s FOAM.

And I’m currently working on TWO candidates for a Foamboard record plane. (Two different propulsion types)

 

[Piotrsko]

u know iv been thinking about that glider that went 500 + mph and iv been thinking how much cooler it would have been if instead of a glider going in loops someone would reach those speeds using a motor and a actual turbine there Is a "company" thats trying to reach 600 mph+ with a jet turbine here is the link

Actually it's the technique they use that allows them to go that fast (gravity) you aren't going to get enough thrust from anything hobby sized. Speed increases are huge thrust increased requirements

 

[Piotrsko]

Yes yes, but It’s FOAM.

The foam only keeps the two skins apart. All structural stresses are carried by the composite skins

 

[Mr Man]

The foam only keeps the two skins apart. All structural stresses are carried by the composite skins

Epp foam, the Radjet. (I think it’s EPP, might be EPO)

 

[Mr Man]

The foam only keeps the two skins apart. All structural stresses are carried by the composite skins

I’d say that is 80% correct, because the other 20% is foam strength. (I’ve got a Mini Arrow without any paper)

 

[khuzaima]

?????

im just gonna assume ur to old to know what Minecraft music sounds like

 

[khuzaima]

Yes yes, but It’s FOAM.

yeah but I was expecting it to be FOAMBOARD

 

[khuzaima]

And I’m currently working on TWO candidates for a Foamboard record plane. (Two different propulsion types)

hmm im guessing one medium sized one and one large on or maybe one medium one and one small one ?

 

[khuzaima]

Actually it's the technique they use that allows them to go that fast (gravity) you aren't going to get enough thrust from anything hobby sized. Speed increases are huge thrust increased requirements

yeah I know it lets these gliders reach incredibly high speeds and not anything hobby sized but maybe........just maybe something like a pbs tj 100 or maybe something really large like a jet cat p400 or a jet cat p1000 pro can probably make a well designed airplane to those speeds....yeah the pbs tj 100 def can "The PBS TJ100 turbojet engine has a maximum speed of 0.9 Mach"

 

[khuzaima]

yeah I know it lets these gliders reach incredibly high speeds and not anything hobby sized but maybe........just maybe something like a pbs tj 20 or maybe something really large like a jet cat p400 or a jet cat p1000 pro can probably make a well designed airplane to those speeds

yes im aware 2 of those engines are hobby grade but u get the idea

 

[khuzaima]

The foam only keeps the two skins apart. All structural stresses are carried by the composite skins

thats what I was trying to say

 

[khuzaima]

I’d say that is 80% correct, because the other 20% is foam strength. (I’ve got a Mini Arrow without any paper)

yeahhh

 

[khuzaima]

yeah I know it lets these gliders reach incredibly high speeds and not anything hobby sized but maybe........just maybe something like a pbs tj 100 or maybe something really large like a jet cat p400 or a jet cat p1000 pro can probably make a well designed airplane to those speeds....yeah the pbs tj 100 def can "The PBS TJ100 turbojet engine has a maximum speed of 0.9 Mach"

even something smaller like a pbs tj 40 would be enough in my opinion to push u to that speed

 

[khuzaima]

The foam only keeps the two skins apart. All structural stresses are carried by the composite skins

and btw im using a H700 motor with a 10x17 carbon prop and 12s what pitch speed does that come to ?

 

[Mr Man]

and btw im using a H700 motor with a 10x17 carbon prop and 12s what pitch speed does that come to ?

384mph. (Assuming the h700 motor is 530kv