TDR 2 Picture

[JRAY]

Originally Posted by mkovalcson

Looks like they were using the X713S blades like Banshee used to set the world record last year. However, there is really no telling if they had a custom design or length made.

3 blades let them drop the headspeed giving them more room before the advancing tip goes supersonic, BUT it puts the retreating blade in more danger of a blade stall.

My guess is that we will never see a 4 blade speed machine. The next logical step would be counter rotating blades so we don't have to worry about the blade stall on the retreating side, but would have more blades delivering thrust. Of course this would require even more power, weight and complexity.

The 4 blade thing was just an attempt at humor.

I agree, and I'm anxious to see what's next and the new technology that will undoubtedly come about.

[mkovalcson]

Originally Posted by JRAY

I'm curious also. Pyro 850? Or is that too big for a TDR?

Apparently not! It was an 850-50 Competition!

https://www.helifreak.com/showpost.p...30&postcount=6

[belgoheli]

the word apparently is well in place.
we'll only know if the 2 blade is flown with the same new mechanics, the same power set up and flown by the same pilot under the same weather conditions...

I could imagine that the combo new head plus new swashplate is not yet available so therefore Robert simply might not have had a choice but to use the 3 blade

Belgo

[jamin_00]

Pics

[JRAY]

Originally Posted by mkovalcson

Apparently not! It was an 850-50 Competition!

https://www.helifreak.com/showpost.p...30&postcount=6

Wow! Those top 4 were making some serious speed!

[jamin_00]

Hell yea, even if it is only top speed in any direction they have reached new ground I would think??

[mkovalcson]

Originally Posted by JRAY

Wow! Those top 4 were making some serious speed!

Gerd pointed out that this was not a World Record speed event and it was just the fastest run and not the average of both directions.

I think the Diabolo-S getting 298kpm with two blades helps put this in perspective.

This is not to say anything against the Diabolo-S, just that the TDV with 3 blades may have had a 17kmh advantage over a two blade machine or this may have had to do with them shoe horning a Pyro 850 Comp in there rather than the Pyro 750 Comps they were using last year.

[JRAY]

Originally Posted by mkovalcson

Gerd pointed out that this was not a World Record speed event and it was just the fastest run and not the average of both directions.

I think the Diabolo-S getting 298kpm with two blades helps put this in perspective.

This is not to say anything against the Diabolo-S, just that the TDV with 3 blades may have had a 17kmh advantage over a two blade machine or this may have had to do with them shoe horning a Pyro 850 Comp in there rather than the Pyro 750 Comps they were using last year.

Yup, saw that thread. Things get posted in to many places. Lol

By the way, I don't know what Miles is running now, but he was using an X-Nova XTS 4535-520, which is supposed to be comparable to the 850 Comp.

That is still a great speed for all helis. FAI world record or not, they were moving. An RC heli making a 195mph pass?

Courtesy of Mark Muller...

PoetingSpeedCup2014 Robert Sixt (1 min 9 sec)

[mkovalcson]

What happened at the end of that video? It looked like there was some kind of failure and the heli was dropped into the brush.

[JRAY]

Originally Posted by mkovalcson

What happened at the end of that video? It looked like there was some kind of failure and the heli was dropped into the brush.

From the translations on the Henseleit helicopters FB group,best I can tell is he lost the tail, not sure why.

[silas3d]

Originally Posted by mkovalcson

It's all impressive.

I'm sure there will eventually be video of the retractable landing gear followed by a lot of ooooooo'ing and aaaaahhhhh'ing.

Question: How many of you would want/trust retractable landing gear on a heli?

I've flown scale helis with retracts. No issues and I'd do it again.

[jamin_00]

X Nova posted this on FB


Congratulations to Miles Dunkel!
2end place at Pötting Speed Cup, 298kmh/h,, with his minnicopter speed Helicopter. powered by Xnova XTS-4535-500kv motor

[Twill]

I did t even know they had a 500kv 4535. Cool


Team aircapitalheli.com

[deanh]

Interesting kosmik placement! By the looks of it it will sit on top of the batteries and be. "floating" when you remove the batteries from the heli?

In the photos without the canopy on it seems to be sitting higher (using the swash as a reference) than where the canopy would sit?

Would the heat generated by the esc affect the batteries if it was in direct contact?

[mkovalcson]

Originally Posted by deanh

Interesting kosmik placement! By the looks of it it will sit on top of the batteries and be. "floating" when you remove the batteries from the heli?

In the photos without the canopy on it seems to be sitting higher (using the swash as a reference) than where the canopy would sit?

Would the heat generated by the esc affect the batteries if it was in direct contact?

This is a prototype. I don't think it's in its final form yet.

[JRAY]

Originally Posted by deanh

Interesting kosmik placement! By the looks of it it will sit on top of the batteries and be. "floating" when you remove the batteries from the heli?

In the photos without the canopy on it seems to be sitting higher (using the swash as a reference) than where the canopy would sit?

Would the heat generated by the esc affect the batteries if it was in direct contact?

It looks like it's anchored in the back. All he would need is a plate that sits ever so sightly higher over the battery to mount the front. Like stated, it's probably not finalized, but notice the fins on the Cool, they've been shaved to fit the hood, so that's probably where he wants it mounted at least. All speculation though.

[EEngineer]

Originally Posted by mkovalcson

It's all impressive.

I'm sure there will eventually be video of the retractable landing gear followed by a lot of ooooooo'ing and aaaaahhhhh'ing.

Question: How many of you would want/trust retractable landing gear on a heli?

I used mechanical retracts for years in pattern competition...

There was never that much of a reliablility problem....unless one didn't set up the
linkages properly.....causing servo stalling and so forth.

They will add weight....and will draw extra servo current.

It's all a tradeoff.

I think it would be way cool......

[EEngineer]

Originally Posted by jamin_00

Pics

That's a lotta batts.....

[Vinger]

Like the tail boom, already aerodynamically shaped.

[Beber]

Hi,

You'll find here some pictures I made during Pöting Speedcup event:
https://plus.google.com/photos/10159...41495887950769








This heli is really a beauty and everything fits in the narrow carbon made canopy.
Most of all, Jan takes a lot of time to present to you and to explain his work.

Enjoy & regards
Sébastien