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All Forums >> RC Airplanes >> Pylon Universe - RC Pylon Racing >> Q-500 Racing >> Thunder Tiger case needed. Page: [1]

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Thunder Tiger case needed. - 3/12/2005 3:52:19 PM   
Alabama Racer


 

Posts: 67
Joined: 8/26/2002
From: Decatur, AL, USA
Status: offline 		A backplate screw broke off on one of my TT .40 engines. Of course, it is too far down inside the hole to have any hope of removing the remains of the screw. Does anyone have a crankcase they would like to sell? Or a toasted engine that has a good case?
Alternatively, from whom do you order TT parts?
My engine was new, had not even been started yet. javascript:void(AddText(' '))
javascript:void(AddText(' '))
Thanks,
Brad Clayton
       Post #: 1

RE: Thunder Tiger case needed. - 3/12/2005 4:34:05 PM   
Bill Vargas



Posts: 1572
Joined: 1/6/2002
From: Team Coldies, CA, USA
Status: offline 		Brad, TT Pro's number is,,, +1-(949)833-0088 and the website is www.thundertiger.com



BV

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If it ain't leaking oil, then something's wrong,,, USMC, RETIRED!

(in reply to Alabama Racer)
       Post #: 2

RE: Thunder Tiger case needed. - 3/12/2005 6:35:39 PM   
daven



Posts: 7026
Joined: 12/7/2001
From: Andover, MN, USA
Status: offline 		Why wouldn't you send it in for warranty?

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(in reply to Bill Vargas)
       Post #: 3

RE: Thunder Tiger case needed. - 3/13/2005 1:08:43 PM   
Alabama Racer


 

Posts: 67
Joined: 8/26/2002
From: Decatur, AL, USA
Status: offline 		I bought this engnie off e-bay. Even tho it has never been run, it is several years old. It has the old style needle that is straight, not slanted back. When I broke the bolt, I was putting on a square backplate, had to tighten pretty heavilly to get it to seat. I don't want to ask them to warranty something that was my mistake.
Thanks for the replies, I will keep looking and come up with something.

(in reply to daven)
       Post #: 4

RE: Thunder Tiger case needed. - 3/13/2005 2:21:20 PM   
RANIERY


 

Posts: 140
Joined: 6/9/2003
From: davie, FL, USA
Status: offline 		hey, if you don't find one let me know i know a friend that has a couple of then he my want to sell them

(in reply to Alabama Racer)
       Post #: 5

RE: Thunder Tiger case needed. - 3/14/2005 5:53:27 AM   
bigtrev@xtra.co.nz


 

Posts: 251
Joined: 9/25/2004
From: christchurch, NEW ZEALAND
Status: offline 		Hey, its more than likely you can drill the bolt out.......its not that difficult! Get the right size taping drill and give it a go. Make certain the motor is held with care but steady in a vice. Give it a go- because its not difficult. If you lived close by I would do it for you, but I am in New Zealand. good luck ttrevor h

(in reply to RANIERY)
       Post #: 6

RE: Thunder Tiger case needed. - 3/14/2005 6:56:02 AM   
Bill Vargas



Posts: 1572
Joined: 1/6/2002
From: Team Coldies, CA, USA
Status: offline 		Brad, have you tried using a jewlers screwdriver inserted into the hole with the broken screw? Sometimes when a bolt breaks off, like in your case, there's a burr on it that just might be big enough for the screwdriver to catch on to thus permitting it to be backed out. You may also want to apply a little bit of heat with a heat gun to make the broken screw come out a little easier,,, but if you think that screw bottomed out when it broke, chances are it ain t coming out.

Another idea,,, as you said, "it is too far down inside the hole,,," try a shorter screw and if you can get at least 3-4 threads into the hole, you should be ok(Use your dremel to make the replacement screw shorter). Just make sure the backplate is fully seated before torquing down the screws


BV

_____________________________

If it ain't leaking oil, then something's wrong,,, USMC, RETIRED!

(in reply to bigtrev@xtra.co.nz)
       Post #: 7

RE: Thunder Tiger case needed. - 3/14/2005 12:58:30 PM   
Alabama Racer


 

Posts: 67
Joined: 8/26/2002
From: Decatur, AL, USA
Status: offline 		I tried using a very small screwdriver to try to back out the remains. However, it is bottomed out and the burr/jagged edge is pointed the wrong direction - if I wanted to get it tighter, might have some success. When I try to drill it out, the bit just wants to walk - small bit is not stiff enough to keep from moving around. A machinist with better tools & skills would probably succeed. Anyway, there are 3 or 4 threads remaining above the broken stud, I will try Bills suggestion & see if that will hold.
Thanks

(in reply to Bill Vargas)
       Post #: 8

RE: Thunder Tiger case needed. - 3/15/2005 2:33:59 AM   
Mikey D


 

Posts: 32
Joined: 10/7/2003
From: Carmel, IN, USA
Status: offline 		You can ask Darrol Cady? A few years ago he offered a service to remove broken screws from cases. I believe he used an acid that did not attack aluminum. I don't think he does it now, but maybe he can tell you the supplier.

If all else fails. I have a case for you for a small fee

Mike DeNeve

(in reply to Alabama Racer)
       Post #: 9

RE: Thunder Tiger case needed. - 3/15/2005 3:11:55 AM   
garys


 

Posts: 782
Joined: 1/31/2002
From: San Diego, CA, USA
Status: offline 		I'm pretty sure it was nitric acid. You may be able to do a search on the net and find out more about it, and where to get it.

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GS

(in reply to Mikey D)
       Post #: 10

RE: Thunder Tiger case needed. - 3/15/2005 5:11:27 AM   
Mluvara



Posts: 1429
Joined: 1/14/2002
From: San Jose, CA, USA
Status: offline 		If you can get a good, small bit (about half the diameter of the bolt) to actually drill in, an EZ out works well...

Unfortunately, getting bolts out of cases is pretty tough to do.

Michael


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Michael Luvara
RCATS - http://www.rcatsystems.com
Luvara Air Racing - http://www.LuvaraAirRacing.com

(in reply to garys)
       Post #: 11

RE: Thunder Tiger case needed. - 3/15/2005 12:43:22 PM   
Ed Smith


 

Posts: 2875
Joined: 12/29/2001
From: Brantford, ON, CANADA
Status: offline
Aw c'mon now Mike. A backplate screw is about 1/8" dia if that. The broken end will be all rough. Try drilling a toughened screw with a 1/16 dia drill bit. The drill will wander off to one side and for sure will destroy what is left of the tapped hole. I have a set of screw extractors, the smallest one in the set recommends a 5/64 drill. So called EZ-outs are Ok for larger screws but for the screws in our engine crankcases, forget it

The acid used is Nitric Acid. The acid attacks the carbon in the steel and the screw collapses. It will not attack the aluminum. For a source try an industrial welding supply house.

Ed S

(in reply to Mluvara)
       Post #: 12

RE: Thunder Tiger case needed. - 3/16/2005 12:42:10 AM   
Alabama Racer


 

Posts: 67
Joined: 8/26/2002
From: Decatur, AL, USA
Status: offline 		I looked closer and there is only 1 thread that is not covered by the broken stud. That is not enough to hold the backplate. Will look into the nitric acid or check w Mike about buying his case.

(in reply to Ed Smith)
       Post #: 13

RE: Thunder Tiger case needed. - 3/16/2005 2:12:37 PM   
diggs_74



Posts: 1296
Joined: 1/20/2004
From: Emerald, WI, USA
Status: offline 		No offense, but it sounds like a lot of work for a $70 engine... Maybe if it was a Nelson but a 40 TT... Keep it for parts and get a new one, no hazorous chemicals needed


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Lee LaValley
NMPRA# 33w

(in reply to Alabama Racer)
       Post #: 14

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