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Sky Bolt engine choice, input requested... - 11/24/2004 5:54 PM   
Johnny C!



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From: Pisgah Forest, NC, USA
Status: offline 		Hello gang,
I purchased used Sky Bolt a few weeks ago. I also purchased
my first four stroke a few months ago. It's an FL-70 OS & I have it
on my Dazzler Arf. I love this combo. I was thinking of buying another
.70 for the Sky Bolt, but I'm wondering if I should go to the .82.
I love the sound & the power of the .70, but I'm thinking that with
the extra drag of the Sky Bolt, that I might buy the .82, this time
around. Your thoughts, please.

Thanks in advance!

Johnny C!

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RE: Sky Bolt engine choice, input requested... - 11/24/2004 6:32 PM   
ksechler



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Status: offline 		Too small. The manufacturer spec's say you can go as large as a 1.2 4-stroke. I would.

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RE: Sky Bolt engine choice, input requested... - 11/24/2004 7:01 PM   
MinnFlyer



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Status: offline 		If you are referring to the Great Planes Skybolt, that will be too small.

I flew mine with an OS 91 and it flew ok, but just ok.

I now have a YS 110FZ on it, and that is great!

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RE: Sky Bolt engine choice, input requested... - 11/24/2004 9:00 PM   
Johnny C!



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From: Pisgah Forest, NC, USA
Status: offline 		Sorry,
My plane is a Sig Sky Bolt. The GP is a Super Sky Bolt...

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RE: Sky Bolt engine choice, input requested... - 11/25/2004 10:37 PM   
552transco



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From: Milpitas, CA, USA
Status: offline 		Hi Guys,

I purchased the GP Super Skybolt and an OS .91. Now I read that MinnFlyer has had this combination and it just flies !QUOT!OK!QUOT!. That is disappointing. I figure I would have a decent flyer with the largest engine recommended by GP. MinnFlyer, what would this plane be like with the .61 installed? It sounds like it is time for me to go 4stroke shopping.


Wayne

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RE: Sky Bolt engine choice, input requested... - 11/26/2004 8:44 AM   
Tired Old Man


 

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Status: offline 		Having experience with three G/P Skybolts, the 61 would be just fine for fast taxi work. Not much else though. I found that the OS 1.08 worked out to be a great two stroke, and the YS 110 is a very good 4 stroke. Other 4 stroke manufacturers would require at least a 1.20 to get excellent vertical and aerobatic abilities. You will probably need the weight up front anyway.

As far as the Sig Skybolt is concerned, the 70 will fly it, but you won't get to do as much with it as you will want to. The 82 would be a better choice.

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RE: Sky Bolt engine choice, input requested... - 11/26/2004 3:41 PM   
robert4u


 

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Status: offline 		Hi guys,


@wayne: I fly mine with a OS 91 FX and the power is more than enough to do all the aerobatics you want it to do.(except for 3-D flying but there are better planes for that).

If you're into 4-stroke I would go for the 1.20 size-engines.

Robert

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RE: Sky Bolt engine choice, input requested... - 11/26/2004 11:17 PM   
552transco



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From: Milpitas, CA, USA
Status: offline 		Thanks robert4u, I feel better now. I don't do any 3-D flying. I am just looking to go out and do a few aerobatics and just enjoy flying this great looking airplane.
Everyone, have a nice safe holiday weekend.

Wayne

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RE: Sky Bolt engine choice, input requested... - 11/28/2004 5:25 AM   
Gray Beard


 

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Status: offline 		YS 110 FZ, you can hot rod it with A big prop or slow it down with A small high pitch prop like A 14X10. The range of this engine dazzeled me. The only bad thing was the price, sticker shock!!

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RE: Sky Bolt engine choice, input requested... - 11/29/2004 8:29 PM   
xplayer930


 

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Status: offline 		if you dotn already know this plane is over enginerred. Dont get me wrong its a great plane, i should know i got 2 of them!!! I would go with the O.S 4 stroke 1.20 with supercharger. that what i got and the vertical is insane!!! How GP ever thought that plane would fly on a lil .60 2 stroke is beyond me.

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RE: Sky Bolt engine choice, input requested... - 11/30/2004 1:11 AM   
LSP972


 

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Status: offline 		Johnny, I'm about to start on a Sig SkyBolt. I've spoken with several guys who have built this one, and all said a good .61 two stroke or .91 four stroke was plenty; unless the model was a lead sled. One fellow has a Saito .65 four-stroke on his; he said it was adequate, but barely. Apparently, an overly heavy or underpowered one is a real bear to fly. This kit is an older vintage and was designed around a .61 two stroke, so that's what I'm going to use, with a Pitts muffler.

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RE: Sky Bolt engine choice, input requested... - 11/30/2004 4:23 AM   
Johnny C!



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From: Pisgah Forest, NC, USA
Status: offline 		Steve,
I'm going to price a Saito .82 & .91 4 stroke.
Good Luck!

Johnny C!

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RE: Sky Bolt engine choice, input requested... - 12/4/2004 8:32 PM   
Cyberwolf



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Status: offline 		If memory serves me right the sig is a tad bit smaller than the greats planes skybolt Which I had and used a 90 supertiger with incowl muff .The plane would do anything I asked of it including straight up torque rolls .MY friend flew his sig Skybolt with a 78 fox wasnt a ball of fire but it flew the plane decent .I would weigh the plane bare and see where you stand.But I think for my munny id go no less than a 90 size 2 stroke or a 100-120 four .Just my 2 cents .

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RE: Sky Bolt engine choice, input requested... - 12/4/2004 8:54 PM   
LSP972


 

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Status: offline 		The Sig is definitely smaller.

I'm not interested in 3D, unlimited vertical, etc., etc. The .61 FSR should be enough; I sure hope it will be...

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RE: Sky Bolt engine choice, input requested... - 9/13/2011 4:08 AM   
trs3243


 

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Status: offline 		Has any one installed a 20cc gaser in this plane

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RE: Sky Bolt engine choice, input requested... - 9/13/2011 9:27 AM   
Zor



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Status: offline 		I have a Saito 125 pulling my Great Plane Skybolt turning a three blade 15 x 7 prop.

A 20 cc gasser should be fine.

I would not suggest anything less than one cubic inch.

Zor

P.S.: Edited on 14 Sep 2011 at 10:42 EDT to correct typo.
It is a 15 x 7 but was written 18 x 7 and was not noticed on reading again before posting.

End


< Message edited by Zor -- 9/14/2011 3:40 PM >

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RE: Sky Bolt engine choice, input requested... - 9/13/2011 11:29 AM   
Johnny C!



Posts: 407
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From: Pisgah Forest, NC, USA
Status: offline 		Wow! What a blast from the past!

I found a good used OS 91 four stroke
to go on my Sig Sky Bolt & it's wonderful.

I have taken the last 18 months off from
flying RC because I have been working to
finish my full size, but I have been itching
to get back into RC again. Maybe next spring.

Later!

John

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RE: Sky Bolt engine choice, input requested... - 9/13/2011 3:50 PM   
raydar


 

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From: stirling, UNITED KINGDOM
Status: offline 		If you go to the skybolt hanger and clubhouse thread you will see my kit build great planes skybolt build with a rcg 20cc gas engine, having no problems so far with installing this engine as the kit build is known to need a bit nose weight, it should come in about 10.5 lbs with no lead required which is not a bad weight for a GP kit skybolt. A fair bit of cowl has to be removed but I like the agressive look it has ended up with.

I will stress this is the GP kit and not the ARF, the kit has a well engineered (balsa railway sleeper) front end that is very strong for a gas engine and even at that I glassed the firewall in to make sure the vibs did not loosen the front end over time. Im not sure what modelskybolt  you have but there is a few about and each is different and may or may not like all that power and weight upfront.

Im going to presume ZOR running a 18 7 3 blade with his saito 125 is a typo, which is out of character for a usually articulate ZOR. 

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RE: Sky Bolt engine choice, input requested... - 9/14/2011 1:26 PM   
Augie11


 

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Status: offline 		We've got 2 GP kit built skybolts at our field, both nicely detailed. One uses a Saito 1.00 four stroke ( which has an actual displacement of 1.1) and the other an OS 1.20 2 stroke. Both fly well (we're at 5300 feet) but in my opinion the Saito flys and sound better. The 2 stroke 1.2 is a bit much.

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RE: Sky Bolt engine choice, input requested... - 9/14/2011 3:47 PM   
Zor



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quote:

ORIGINAL: raydar

>
>
>
Im going to presume ZOR running a 18 7 3 blade with his saito 125 is a typo, which is out of character for a usually articulate ZOR. 


Many thanks raydar to mention my typo and give me the opportunity to correct it.
It has now been corrected. I hit the 8 just above the 5 on the keyboard and did not notice it when reading prior to posting.

You are a good man and I appreciate that.

Zor


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RE: Sky Bolt engine choice, input requested... - 9/15/2011 2:29 AM   
Zor



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quote:

ORIGINAL: Augie11

We've got 2 GP kit built skybolts at our field, both nicely detailed. One uses a Saito 1.00 four stroke ( which has an actual displacement of 1.1) and the other an OS 1.20 2 stroke. Both fly well (we're at 5300 feet) but in my opinion the Saito flys and sound better. The 2 stroke 1.2 is a bit much.


All the engine does is rotate the prop.  
and makes some sound.

Zor



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