RE: Close look at GP .07 Thunder Tiger  
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All Forums >> RC Airplanes >> "1/2 A" & "1/8 A" airplanes >> RE: Close look at GP .07 Thunder Tiger
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RE: Close look at GP .07 Thunder Tiger - 12/10/2007 5:49:51 AM   
combatpigg



Posts: 9575
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		4000686798 [Isn't Mansons' number 4000686797?] Look at it on the bright side, now you have a good excuse to buy $2000 worth of home machinist equipment so you can rebush the crankcase and "turn" the crank.

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Led Zeppelin is NOT "old fogie" music.

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       Post #: 26

RE: Close look at GP .07 Thunder Tiger - 12/11/2007 4:51:27 AM   
4000686798


 

Posts: 158
Joined: 7/26/2004
From: USA, USA
Status: offline 		CP,

Your on to me now that you know about my brother.

Actually I just picked a number because all the good names were gone!

I have a mill/lathe combo, but rebushing a new engine doesn't please me.

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       Post #: 27

RE: Close look at GP .07 Thunder Tiger - 12/11/2007 5:09:05 AM   
combatpigg



Posts: 9575
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		4000686798, I had the same feeling after spending half a day trying to get RCU to approve my screen name requests.
There really is a super fine line between too tight and too loose....not being a machinist, I still need to learn how to rebush cases to salvage some engines.

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Led Zeppelin is NOT "old fogie" music.

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       Post #: 28

RE: Close look at GP .07 Thunder Tiger - 12/16/2007 9:52:15 PM   
microsprint9



Posts: 384
Joined: 11/20/2004
From: london, ON, CANADA
Status: offline 		Well got my .07 on the test bench today, used a heat gun before starting for the first time to help loosen it up, fired up quickly, got about 14700 on an old windsor 6x3 prop, engine seems to vibrate a bit, check the prop and tried to balance it, took too much time sanding so i got an APC 6x3, balanced it, bolted it on for the next two runs. The next 2 runs seemed better, it would hold 16000rpm at one click rich from max rpm, still think i need to try a 6x2 to get the RPM up. Overall engine starts great, idles very well, throttle response is great now just gotts get some more rev's out of her. Fuel was Omega 10%

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       Post #: 29

RE: Close look at GP .07 Thunder Tiger - 12/16/2007 10:46:24 PM   
combatpigg



Posts: 9575
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		A Cox SureStart with a sampler bottle of Crown Royal tied to it will weigh less, cost less and put out more power.

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Led Zeppelin is NOT "old fogie" music.

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       Post #: 30

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 2:13:04 AM   
microsprint9



Posts: 384
Joined: 11/20/2004
From: london, ON, CANADA
Status: offline 		Well i guess i'll have to go right to the COX website and buy some then.

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       Post #: 31

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 2:35:46 AM   
combatpigg



Posts: 9575
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		You'll also need a roll of tie wire and some of those sampler bottles of Crown Royal, too.

_____________________________

Led Zeppelin is NOT "old fogie" music.

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       Post #: 32

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 2:45:58 AM   
microsprint9



Posts: 384
Joined: 11/20/2004
From: london, ON, CANADA
Status: offline 		So what kind of RPM can i get out of one of those $6.99 .049's on an APC 6x3? and how much would it cost me to modify it a throttled version?

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       Post #: 33

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 3:44:09 AM   
combatpigg



Posts: 9575
Joined: 11/22/2003
From: arlington, WA, USA
Status: online 		With a Surestart you never know what you'll get, out of 10 that I bought, about 4 were real good runners. If you want to make your own custom throttle, I think about $1000 worth of machine shop equipment should get you well on your way.

< Message edited by combatpigg -- 12/17/2007 3:51:33 AM >

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Led Zeppelin is NOT "old fogie" music.

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       Post #: 34

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 6:01:47 AM   
4000686798


 

Posts: 158
Joined: 7/26/2004
From: USA, USA
Status: offline 		After buying my GP .07 and being excited about this little engine, my disapointment came when I ran it on the test stand. Only 16,000-16,500 out the box with a 6x3 is nothing to write home about.

There is enough metal in this baby you would think it would at least turn up close to a Cox .09, or .10 size engine.

Even if you bought 10 sure starts the cost would only be $69.90, if you got 4 good runners that's about $17.50 an engine plus a lot of extra parts fool around with. Who needs a throttle?

If your looking for a throttled engine, as I understand the AP WASP will give about 16,000 with a 6x3 out of the box for far less weight then the GP .07

Can someone please confirm the out of the box performance of the AP WASP???



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       Post #: 35

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 8:07:00 AM   
OzMo



Posts: 1378
Joined: 9/2/2002
From: OZark, MO, USA
Status: offline 		Get the Sure Starts, send me the Crown Royal

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Yes dear, I did glue my hand to the airplane to keep from dropping it.

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       Post #: 36

RE: Close look at GP .07 Thunder Tiger - 12/17/2007 11:59:53 AM   
ProBroJoe



Posts: 453
Joined: 9/24/2004
From: Annapolis, MD, USA
Status: offline
quote:

ORIGINAL: 4000686798

Can someone please confirm the out of the box performance of the AP WASP???



Sure, outta the box, my AP .061 turns a APC 5.7x3 @ 18,500 RPM on 25% Sig Champion fuel, which is enough for unlimited vertical on my 12 oz SureShark....Check out the "Got a SureShark to build?" thread, post #163, for a link to a video of my AP .061 in the SureShark. I know the AP has gotten a lot of bad press, but I must be one of the lucky ones as mine runs like a champ.


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       Post #: 37

RE: Close look at GP .07 Thunder Tiger - 12/18/2007 3:14:12 PM   
Yuu


 

Posts: 317
Joined: 9/4/2006
From: Shawano, WI, USA
Status: offline 		micro... it won't cost much to build a throttle ring for the throttle on a SureStart. One way is to use 1/2" ID copper water pipe, cut 1/2" or so long to fit over the lower part of the cylinder, saw a vertical slot in it to adjust the size, add an 'arm' for the throttle wire. The turning of the sleeve and slot opens and closes the exhaust port area, and it acts like a throttle. Dickiebird wrote a thread on it. Another way is to get a thin, brass "T" from the auto parts house [$2] and make a 'trombone' slide to control the intake air... there's a thread here on that too. Do a search for throttle....

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       Post #: 38

RE: Close look at GP .07 Thunder Tiger - 12/18/2007 6:00:24 PM   
KidEpoxy



Posts: 3261
Joined: 10/14/2004
From: San Antonio, TX, USA
Status: online 		There is a nice HowTo CopperPipe Throttle Ring in the Reedy FAQ Post#40 by McLintock

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       Post #: 39

RE: Close look at GP .07 Thunder Tiger - 12/19/2007 2:14:04 AM   
jeffie8696



Posts: 1014