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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Kinetic Starter trouble
02-04-2010 02:56 AM  8 years agoPost 1
mundo330

rrApprentice

Holly Springs, GA, USA

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I have a Kinetic 50 I purchased cheap as a bird to start back into helis after 15 years away. It flies well when I can start it. The pin at the bottom of the starter shaft keeps sliding out. I have even tried loctite. Does anyone know of a fix for this poor design. Is there a century upgrade to replace the spring loaded starter on this bird.
I could machine a one piece shaft that would attach to the top of the fan but it would need heavy mods on the fan. Any ideas
Thank You
Doug

Causality is the Root of all Life!

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02-04-2010 03:28 AM  8 years agoPost 2
Gearhead

rrMaster

Vt

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OK, there is something wrong because the system is very reliable, did you try a new Setscrew ? did you clean the Threads ?,, so,, try these 3 things,,,,

A) remove the Setscrew and throw it away !!!!!!!!!!

B) get a new Setscrew and with Rubbing Alcohol clean both the Inside threads in the Shaft and the Threads on the Setscrew,, let dry,

C, use fresh Blue Locktite and tighten the Setscrew very tight..

the System is usually very very reliable !!

Jim
Buzz Buzz Buzz

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02-04-2010 06:20 AM  8 years agoPost 3
mundo330

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Holly Springs, GA, USA

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Thank You Jim
Thanks Jim,
It seems the set screw either was missing or fell out. As I had not removed the shaft I was unaware of its existence. I will replace the set screw with a new one and loctite it in.
P.S.
Have you ever used loctite 290? It is a medium strength, oil resistant compound that wicks into threads of reassembled parts. It is used in full scale and engineering/ machining circles. I have had great results with it.
Thank you Again Jim

Causality is the Root of all Life!

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02-04-2010 02:49 PM  8 years agoPost 4
t2o

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Pleasureville Ky

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Be very careful with ARF Heli's; Assume NO loc-tite was used anywhere. The K50 was//is a very popular bird around my local hobby shop and every single one that did not come apart pre-flight for the loc-tight treatment came apart in-flight! Mostly the tail drive couplers front and back-- the set screw would back out leaving a new pilot with no tail control.

This is a great heli that flys super, a few hours with a bit of loc-tite will keep it that way. Any ARF will do the same.

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02-04-2010 11:55 PM  8 years agoPost 5
reddragon

rrElite Veteran

Brooklyn, N.Y.

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Every once in a blue moon the starter coupler on my Hawk slips even though I cleaned the grub screw threads and the coupler threads first before using loc-tite.

Wayne - Fly it like you stole it! You're in good hands with Runryder!

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02-05-2010 02:48 AM  8 years agoPost 6
mundo330

rrApprentice

Holly Springs, GA, USA

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Update
Thank you all for the help. After 15 years away from helis it is taking some getting used to. As I am familiar with ARF I did go over all the known grub screws and Bolts with loctite, however this starter setup was a little alien to me. My Schluters and Excels had static shafts pressed solid into the clutch, so they turned with the engine and where a balancing nightmare. My Kalts and Shuttle had belt start and at the time the most care free, as long as the belt did not break. Any way after dis-assembly I removed the grub screw found the center of the cross pin and ground a small flat for the new grub screw. Problem solved! Also on the canopy stand offs the grommets would last for 2-3 removals and fall apart. I replaced them with electronic grommets I found at radio Shack and then turned down the sharp edge at the end of each stand off.
My next fix will be to replace the old 4131 coreless servos with digitals. My sons raptor has 3151s on the cyclic and a 9452 on the cyclic. He has about 16 flights on the bird, but he is changing to the brushless digital servos, so I will take his hand me downs!
Well thank you all again and keep your landings skids down!
Doug Serrand

Causality is the Root of all Life!

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02-06-2010 11:44 PM  8 years agoPost 7
MAXHSHV

rrKey Veteran

,mn usa

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the kinetic starter is sensitive to the motor being flooded so make sure you keep a fuel line clamp on when not running just like any nitro heli.here is the upgrades i have on my ravens and nx 50
http://www.heli-world.com/detail.aspx?ID=9471

this is stk on the nx works great, just remove the stk starter system and replace you fan with this one that has a hex built right in to it .
http://www.heli-world.com/detail.aspx?ID=9029
this one is really trick, it comes with it's own shaft to put in your wand, has a one way bearing in it and is all cnc so you get more airflow aswell.

Century heli rep. To much power is never enough.

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02-07-2010 07:21 AM  8 years agoPost 8
mundo330

rrApprentice

Holly Springs, GA, USA

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Bad links or issue with the web server?
MAXHSHV,
I do not know if it is the links you posted or an issue with the company's web server but it seems like they had a serious SQL error in their code.

Causality is the Root of all Life!

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02-07-2010 01:21 PM  8 years agoPost 9
MAXHSHV

rrKey Veteran

,mn usa

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let e try again.
http://www3.towerhobbies.com/cgi-bi...p?&I=LXPLE4&P=Z

apperntly heli world's site is down right now.but i found the cnc upgrade fan at tower so you can see.
and i do have the part number and price of the stk NX 50 fan with the built in hex adaptor
HI3009A $14.95

Century heli rep. To much power is never enough.

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