FOAM BOARD HJK SPEEDWING DISCUSSION

[khuzaima]

Hmm, that comes out to a total PITCH speed of 147mph...

do u recommend me maybe going with a smaller prop or something ?

 

[Mr Man]

UHMMM IS THAT BAD ??

Not necessarily, but you won't be able to break 140mph.

 

[Mr Man]

do u recommend me maybe going with a smaller prop or something ?

Higher rpm smaller prop.

 

[khuzaima]

Higher rpm smaller prop.

hmmm makes sense

 

[khuzaima]

iv seen some people using a scorpion motor so maybe I can use a SCORPION HK 4225-610KV or a Dualsky XM 6360 RE - 350KV

 

[khuzaima]

Higher rpm smaller prop.

iv been looking into strecker-RS motors which would u recommend, something that wont break the bank

 

[Piotrsko]

Mr.Man: might figure on less than 65% efficiency so maybe not more than 100 mph on that prop, needs to be almost sonic at the tips at spped.

 

[khuzaima]

Mr.Man: might figure on less than 65% efficiency so maybe not more than 100 mph on that prop, needs to be almost sonic at the tips at spped.

u know I genuinely cant tell if ur joking or giving actual advice 🤦

 

[khuzaima]

Not necessarily, but you won't be able to break 140mph.

yeahhhhhh thats not gonna work I kinda want to break 200 mph on this plane

 

[Mr Man]

u know I genuinely cant tell if ur joking or giving actual advice 🤦

He’s right, but with the right airframe 100mph is possible.

 

[khuzaima]

He’s right, but with the right airframe 100mph is possible.

with the right airframe ? I am techincally building a copy of the hjk big monster so it can reach high speeds right ?

 

[khuzaima]

He’s right, but with the right airframe 100mph is possible.

and btw what motor do u recommend me using

 

[khuzaima]

Higher rpm smaller prop.

wait is this why JH Hot Deamon wasn't able to go 200 mph ??​

 

[Mr Man]

wait is this why JH Hot Deamon wasn't able to go 200 mph ??​

Hold on, let me do some math…

 

[Mr Man]

wait is this why JH Hot Deamon wasn't able to go 200 mph ??​

Yup, pitch speed of 237mph.

 

[Mr Man]

with the right airframe ? I am techincally building a copy of the hjk big monster so it can reach high speeds right ?

Possibly, out of a dive for sure.

 

[Mr Man]

and btw what motor do u recommend me using

I’m not very used to xl speed setups, I’m more used to big motor tiny prop, super high rpm setups.

 

[Mr Man]

But for My Hotliner I’d recommend a 4068 2650kv inrunner, 200a esc, 5x8 prop for STARTERS. And two 3s lipo’s in series to make 6s.

 

[khuzaima]

Yup, pitch speed of 237mph.

ok makes sense why it didn't go as fast and im gonna build a Sharknado with the same setup ur talking about small prop high rpm in runners

 

[khuzaima]

But for My Hotliner I’d recommend a 4068 2650kv inrunner, 200a esc, 5x8 prop for STARTERS. And two 3s lipo’s in series to make 6s.

two 3s lips ? why not just use a 6s lipo I mean it would make sense to make a series connection if u want say a 12s or say a 18s lipo but why use 2 3s when u can just use 1 6s and yeah ill try that setup for UR hotliner but for my apex phantom (big monster) ill just see what other people are running on the hjk big monster and ill just use that