RE: Nemesis NXT electro by air-c-race.de    Gallery
View related threads: (in this forum | in all forums)

Logged in as Guest



Users viewing this topic: none
    Search This Thread  
 
Printable Version

All Forums >> RC Airplanes >> Extreme Speed Prop Planes >> RE: Nemesis NXT electro by air-c-race.de
Page: <<   < prev  1 2 3 [4] 5   next >   >>  

Tower Hobbies Get Coupon Codes Brands  
Login
Message << Older Topic   Newer Topic >>
RE: Nemesis NXT electro by air-c-race.de - 4/3/2012 10:07 AM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		wow ..If I read the chart correct means you came in with almost 90 km/h for landing !!! I think you should find the minumum landing speed required...I wonder if this can be calculated ???
Also I am not into electric, but what is your estimation on rpm with a 10 S ? I thinke we have a very potential racer here Make some vids on your next flight if possible

cheers
Gordon

Hide Signatures

(in reply to Spuetz)
       Post #: 76

RE: Nemesis NXT electro by air-c-race.de - 4/3/2012 4:40 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hi Gordon, Yes, my bad... 90 km/h on landing - that's about the same speed that a Cessna touches down  - the full size!!! at 2000 lbs and with much bigger tires!

Well, I think it will be around 17,500 rpm on a 11x11 at 10S. that would give a prop wash speed of 180 MPH. Will pull 4.2 kW. at 35 volts thats about 120 A... and a thrust of 33.5 lbs (plane weighs 8.8 lbs!)
The same power will be needed to spin an 11x12 at 17,000. That will give 190 MPH...coming out of a dive I should be well at 190 MPH then... We will see. first I have to master the landing! I wish I had a telemetric system. Then I could determine the stall speed up high and keep the airplane just above that on approach.. Like in a full size...

Cheers, martin

Hide Signatures

(in reply to Headhunter70)
       Post #: 77

RE: Nemesis NXT electro by air-c-race.de - 4/11/2012 4:54 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hi Gordon and everyone,

one more thing I did is to replace the landing gear. The provided wheels are way too small for grass fields and way too soft for the weight of the plane. It always looked like it had flat tires and didn't roll much at all. And the springs in the provided legs are also too soft. They weight of the plane had them pushed almost all the way in already.

Michael of air-c-race told me that there weren't any of the L-shaped ones large enough for larger wheels. But I figured that I don't need L-shaped ones. Straight ones are fine. There is more than enough room in the centre section of the wing.
(And it is more scale anyhow). So I ordered behotec 140mm legs and shortened them to 130mm. Now with 63mm diameter wheels it should be much better.I reccomend anyone make that change who intends to fly off grass! Take a look. Now that looks way more sturdy for a fast, heavy plane landing on grass!

see here a video of the gear action


Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize
Click to see fullsize image.
Click for fullsize


< Message edited by Spuetz -- 4/11/2012 5:32 PM >

Hide Signatures

(in reply to Headhunter70)
       Post #: 78

RE: Nemesis NXT electro by air-c-race.de - 4/11/2012 5:28 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		Hi Martin,

That looks much better indeed.

Maybe the angel of the picture is making it looking like that, but it seems the even the new wheels are still lost in the big whole ...
I anyhow will receive my NXT tomorrow afternoon...if everything goes well I will take her to the field on Sunday and start to breakin the engine...
maybe if I am brave enough I also will maiden her...

Will post some pictures tomorrow and of course let you know how it went on Sunday

(still did not find a proper carbon prop 10x10 yet )

cheers
Gordon

Hide Signatures

(in reply to Spuetz)
       Post #: 79

RE: Nemesis NXT electro by air-c-race.de - 4/11/2012 5:35 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hi Gordon,

yeah, they still are a bit small. But since they go in at an angle what with the forward position of the gears I even had to enlarge one hole a bit... When all goes well and she's flying all right I will enlarge the hole to squares and put gear doors on! that'll be something!

Cheers and good luck!

Martin

Hide Signatures

(in reply to Headhunter70)
       Post #: 80

RE: Nemesis NXT electro by air-c-race.de - 4/13/2012 3:10 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		Hi there,

I finally received my Nemesis NXT Attached some pictures...I was surprised how the retracts problem was solved. Not sure wether this is a proven concept or more an experimental setup...what do you guys think of this ?

Anyhow I will maiden her soon and will keep you posted...

rgds
Gordon


Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to Spuetz)
       Post #: 81

RE: Nemesis NXT electro by air-c-race.de - 4/13/2012 3:24 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hi Gordon,

i would say that is an excellent setup for the landing gear. and rather close to scale if you look at photos of the full size. it has those cantilever-gears as well. Should be very sturdy!
Safe landings!
Cheers,
Martin

Hide Signatures

(in reply to Headhunter70)
       Post #: 82

RE: Nemesis NXT electro by air-c-race.de - 4/14/2012 12:01 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		Hi Martin,

Quick question, where did you put the CG... 55mm as recommanded ?

rgds
Gordon

Hide Signatures

(in reply to Spuetz)
       Post #: 83

RE: Nemesis NXT electro by air-c-race.de - 4/14/2012 8:38 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		 Hi Gordon,
Yes, i did. However, I had my second maiden today. Went all right. Not brilliant, but ok. The plane was definitely diving hard and I trimmed it back. I didnt retract the gear, though. I just wanted to use the battery trying to land. Got it down all right. I did trim up though quite a bit and after lading I saw that the elevator was up about 2 mm. And it still wasn't flying level without holding the pitch back a little. Now I don't know wether that was because of the drag of the gear and the fact that it is forward of the cg whent extended. But my suspicion is that it it nose heavy. I will try and put the cg. Back a little for next flight. Will probably be in Mobday. I will keep you posted...

Hide Signatures

(in reply to Headhunter70)
       Post #: 84

RE: Nemesis NXT electro by air-c-race.de - 4/17/2012 12:05 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		Hi there,

Quick update, went on Sunday to the field to break in the engine. Since the engine is build in upside down I had to put the plane on the back, engine started like a dream...
Used a Zinger wooden propeller 11x8 to run the engine as rich as possible but still to have high RPM..anyhow when the pipe kicked in, one big bang and the pipe was in the fuselage half a second later..

See my solution attached...when this pipe will disappear agin it was produced by Houdini..



Attachments
Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to Spuetz)
       Post #: 85

RE: Nemesis NXT electro by air-c-race.de - 4/17/2012 4:18 PM   
airraptor


 

Posts: 2671
Score: 130
Joined: 1/26/2004
Last Login: 5/20/2013
From: fairfield, CA, USA
Status: offline 		Where are your keepers for the those dubro clevis's on the servos? You're asking for a failure the way you have it. Atleast put some fuel line of heat shrink on them.

_____________________________

AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

Hide Signatures

(in reply to Headhunter70)
       Post #: 86

RE: Nemesis NXT electro by air-c-race.de - 4/17/2012 8:51 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		who are you talking to? What do you mean?

Hide Signatures

(in reply to airraptor)
       Post #: 87

RE: Nemesis NXT electro by air-c-race.de - 4/17/2012 9:38 PM   
airraptor


 

Posts: 2671
Score: 130
Joined: 1/26/2004
Last Login: 5/20/2013
From: fairfield, CA, USA
Status: offline 		To headhunter. If you look in the far right of the post box it has a " In response to " area. he has done good work on everything but the clevis's.

_____________________________

AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

Hide Signatures

(in reply to Spuetz)
       Post #: 88

RE: Nemesis NXT electro by air-c-race.de - 4/18/2012 8:11 AM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hello airraptor,

ah, I see. Good call. I must put those on on the back as well. Have put them on in the fuselage, but not yet at the elevator... Although - I have never had a failure of those before... But better be safe than sorry...

Hide Signatures

(in reply to airraptor)
       Post #: 89

RE: Nemesis NXT electro by air-c-race.de - 4/18/2012 2:26 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		will do so gentlemen, thx for the hint

Hide Signatures

(in reply to Spuetz)
       Post #: 90

RE: Nemesis NXT electro by air-c-race.de - 4/18/2012 6:10 PM   
airraptor


 

Posts: 2671
Score: 130
Joined: 1/26/2004
Last Login: 5/20/2013
From: fairfield, CA, USA
Status: offline 		For you guys this is a good read and might open your eyes some on clevis's and how they operate and how they should be for max strength.

http://www.rcuniverse.com/forum/m_11000354/mpage_1/key_/tm.htm



_____________________________

AMA # 186123
I dont always fly inverted, but when I do, I do it down low.

Hide Signatures

(in reply to Headhunter70)
       Post #: 91

RE: Nemesis NXT electro by air-c-race.de - 4/18/2012 7:10 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		@airraptor...excellent link, thx for sharing this eye opener

Hide Signatures

(in reply to airraptor)
       Post #: 92

RE: Nemesis NXT electro by air-c-race.de - 4/27/2012 8:48 AM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline

Hello Gordon,

any news? have you flown it?
Here the weather turned bad so I coudn't fly again. Willl try on the weekend.



Hide Signatures

(in reply to Headhunter70)
       Post #: 93

RE: Nemesis NXT electro by air-c-race.de - 4/27/2012 5:02 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		Hi Martin,

No, not flown yet. Last Sunday I noticed that both tanks have a leak...Michael is going to send me some new tanks...they will not be here before middle of May...so I have to wait.
Btw where did you put your reciever...with all that carbon inside the fuselage, I have to find a clever place for my 2.4 GHz Futaba...

At the weekend I will practice some low altitude speed passes of the runway with my jackal..so waiting for the Nemesis will not hurt too much

cheers
Gordon

Hide Signatures

(in reply to Spuetz)
       Post #: 94

RE: Nemesis NXT electro by air-c-race.de - 4/28/2012 7:33 AM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hi Gordon,

I use the same system - FASST. I put the receiver onto the carbon in the small part of the fuselage above the wing. I led the antennas to the back - one on top of the servo mounting tray, one below. I led the antenna into a plastic tube that I heat- bent 90 degrees and glued onto the servo tray. That way it faces away from the tray and past the carbon fibre of the fuselage's side panels. That way I have always at least on antenna not shielded by carbon fibre. See picture.

Attachments
Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to Headhunter70)
       Post #: 95

RE: Nemesis NXT electro by air-c-race.de - 5/4/2012 4:24 PM   
Djamal


 

Posts: 13
Score: 100
Joined: 10/31/2003
Last Login: 3/8/2013
From: Krasnodar, RUSSIA
Status: offline
quote:

ORIGINAL: Spuetz

ok, i am going fully electric!
Ralph of powercroco.de built a motor for me, based on a Scorpion 4530. Here it is. (pictures)

Specs:

HK 4530 4+5x1,6YY

11x11 apc sport

about 17,100 rpm (static) on 35V + 150A.
weight: about 19.5 oz...

That's over 5 kw of power!

Flown on 10s
I'll start with 6s on 12x13 to try out how it flies, then gradually increase the number of cells (an weight with that) with smaller props...
the 6s 5000 that I have already weighs 31 oz...

The motor has a 10mm (0.4 inch !) shaft, tapered down to 6mm for the prop - with fat bearings! So the usual bearing-problem of the Scorpion motors won't be an issue here




Dear friend,
What the difference between default Scorpion 4530 and tuned one?

What the Hitec servos you use in fuselage?



Hide Signatures

(in reply to Spuetz)
       Post #: 96

RE: Nemesis NXT electro by air-c-race.de - 5/4/2012 6:34 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hello,

10mm axle, much better bearings, different windings...(I think, but I am not sure.)

I use HS5245MG. 

Hide Signatures

(in reply to Djamal)
       Post #: 97

RE: Nemesis NXT electro by air-c-race.de - 5/4/2012 6:50 PM   
Djamal


 

Posts: 13
Score: 100
Joined: 10/31/2003
Last Login: 3/8/2013
From: Krasnodar, RUSSIA
Status: offline
quote:

ORIGINAL: Spuetz

Hello,

10mm axle, much better bearings, different windings...(I think, but I am not sure.)

I use HS5245MG. 


Thank you for your answer!
have you any contacts to Ralph? I want to buy this motor. How much it was for you?

I finde two editions on his site:
scorpion 12N8P 4530
scorpion 12N10P 4530.

Which one i need?

Hide Signatures

(in reply to Spuetz)
       Post #: 98

RE: Nemesis NXT electro by air-c-race.de - 5/23/2012 12:37 PM   
Spuetz



Posts: 649
Score: 100
Joined: 2/1/2003
Last Login: 5/20/2013
From: Koeln, GERMANY
Status: offline 		Hello everyone.

Crash! Dead!
I tried to land but she just wouldn't slow down. In trying to slow her down I had a couple of quite aprupt stalls during the turn to final. Could recover every time. I just couldn't make her slow enough. Then, on final, she would float and float and float at around 80 km/h (50 mph). On climb out another violent stall that I couldn't recover.

I guess the airplane was just too heavy. I had installed a 6S 5000 battery that alone weighs 860 gramms (about 30 oz). That plus the motor at around 550 gramm (about 20 oz).. I had calculated that 6s5000 will give me 3 minutes of full power - not thinking that one hardly every flies full power longer than a couple of seconds... the last flight was close to 9 minutes and I had only used up 2200 mAh. (lots of slow flying, trying to land)


Anyhow - as the Dalai Lama says: "If you lose, don't lose the lesson". So this is the learning: 3000 mAh is plenty for that aircraft. And: do program for the ailerons to go up 2 millimeters or so for final approach. Just so she will come down and not stall so early! That will help.

And I logged 251 km/h (156 MPH) without a dive - just from straight and level... So with 10s she would have gone close to 300 km/h... well wouldhavecouldhave...



Attachments
Click to see fullsize image.
Click for fullsize 		Click to see fullsize image.
Click for fullsize


Hide Signatures

(in reply to Headhunter70)
       Post #: 99

RE: Nemesis NXT electro by air-c-race.de - 5/23/2012 4:47 PM   
Headhunter70


 

Posts: 51
Score: 100
Joined: 11/10/2003
Last Login: 5/14/2013
From: Casablanca, MOROCCO
Status: offline 		UUrrrgh Oh Martin,

Sorry to read this, now I am scared to maiden my one . Just recieved my new tanks last weekend.
Did she stall in slow turns, or did she stall when you tried to slow her down ? At what distance did you start the final ?

Btw do you know what is the profile of the wings ?

Also can you check with Michael if he can give you a new cowl...at the picture it looks the damage is not too bad and could be repaired ???

Cheers for now
Gordon

Hide Signatures

(in reply to Spuetz)
       Post #: 100

Page:   <<   < prev  1 2 3 [4] 5   next >   >>  
All Forums >> RC Airplanes >> Extreme Speed Prop Planes >> RE: Nemesis NXT electro by air-c-race.de
Page: <<   < prev  1 2 3 [4] 5   next >   >>  




Jump to:


 
Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

RC Universe is a service of Internet Brands, Inc. Copyright © 2001-2013.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America


0.906RCU1