Supertigre .90  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Glow Engines >> Supertigre .90
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Supertigre .90 - 1/22/2002 7:37:49 AM   
danielfd



Posts: 39
Joined: 1/14/2002
From: Panamá, PANAMA
Status: offline 		can anyone tell me which props and how much nitro percentage is good? im going to install this engine in a greeat planes extra 300s i want to use it for hover so i gonna use big props advice will be welcome.

Thanks in advance
       Post #: 1

ST .90 - 1/22/2002 9:31:46 AM   
starzak



Posts: 1699
Joined: 12/5/2001
From: Chacotoma, NM, USA
Status: offline 		About all that I can contribute is , that I run my ST .90 in a BTE Vortex Delta using a 14 x 6, and Cool Power 10% nitro. It's powerful, and reliable.

Jim Lynch - Moderator

(in reply to danielfd)
       Post #: 2

Supertigre .90 - 1/22/2002 10:14:17 AM   
GrnBrt



Posts: 6992
Joined: 12/5/2001
From: Everett, WA, USA
Status: offline 		It has been my experience that ST engines like a lower nitro then other engines, especially 90 and above. Remember that they are (were) built in Italy and they don't use nitro there as it is [SIZE=4]expensive!!!!!!!!![/SIZE]


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       Post #: 3

Supertigre .90 - 1/22/2002 8:20:43 PM   
danielfd



Posts: 39
Joined: 1/14/2002
From: Panamá, PANAMA
Status: offline 		i thought a 14x6 was for a 4 stroke :P does it turns this prop at a good rpm?

(in reply to danielfd)
       Post #: 4

Trial & Error - 1/22/2002 9:05:39 PM   
starzak



Posts: 1699
Joined: 12/5/2001
From: Chacotoma, NM, USA
Status: offline 		When it comes down to final prop selection, it's always trial & error. The 14 x 6 Master Airscrew takes my Vortex out of sight vertical !

Jim Lynch - Moderator

(in reply to danielfd)
       Post #: 5

Supertigre .90 - 1/22/2002 10:01:52 PM   
danielfd



Posts: 39
Joined: 1/14/2002
From: Panamá, PANAMA
Status: offline 		ok i gonna try that one and a 15x4 i have around

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       Post #: 6

Supertigre .90 - 1/22/2002 10:55:20 PM   
Snaproll-RCU


 

Posts: 5
Joined: 1/19/2002
From: Lisbon, Ohio
Status: offline 		danielfd. My S.T. 90 has been on a Goldberg Ultimate for four seasons and has gotten stronger each flight. A.P.C. 13X7 prop and Omega 10% nitro fuel. I always add enough castor to bring the oil content up to 20% and My S.T. engines all perform flawlessly. Good luck with yours.

(in reply to danielfd)
       Post #: 7

ST 90 props - 1/23/2002 1:22:27 AM   
TiGuy


 

Posts: 81
Joined: 1/9/2002
From: Denver, CO,
Status: offline 		I agree that 10% nitro is the max. Zinger 14x6-10 is great on my WM Super Chipmunk. 13x7 or 8 works very well too, but I like the braking effect of the 14.

(in reply to danielfd)
       Post #: 8

Supertigre .90 - 1/23/2002 9:56:09 PM   
danielfd



Posts: 39
Joined: 1/14/2002
From: Panamá, PANAMA
Status: offline 		anyone knows at how many rpms the supertigre turns a 14x6 or a 15x4

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       Post #: 9

Supertigre .90 - 1/23/2002 11:50:12 PM   
Texan



Posts: 470
Joined: 12/20/2001
From: Georgetown, TX, USA
Status: offline 		Danielfd,

I have been running a ST.90 on 10% OMEGA and a 14x6 MA prop in a Cermark Extra 300s ARF. I did swap out the carb for a OS 7D to help improve overall throttle performance. I am getting 10400 with this combo. For reference I also get 11300 with a 13x6 prop. However the 14x6 has better pull for vertical and breaking effect on down lines. I have not tried to hover yet but there seems to be plenty of pull. To see my plane click the WWW button on the bottom of this post.

Regards,
Scott

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< Message edited by texan-RCU -- Jan 23 2002 6:55PM >

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       Post #: 10

Supertigre .90 - 1/24/2002 12:00:33 AM   
Texan



Posts: 470
Joined: 12/20/2001
From: Georgetown, TX, USA
Status: offline 		Here is another photo

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       Post #: 11

Supertigre .90 - 1/26/2002 2:44:23 AM   
danielfd



Posts: 39
Joined: 1/14/2002
From: Panamá, PANAMA
Status: offline 		hey ur extra looks nice the only bad thing is the the cowl paint doesnt matches the red monokote but oh well still looks nice tell me how ur plane flies and thanks for telling me the info about rpm

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       Post #: 12

St 90-More power!! - 1/26/2002 7:11:50 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		Check your spray bar. The earlier engines used a flat spray bar verses newer ones that are round. You can file the round one, but do not go into the fuel passage or you can pay up to $15.00 for a ruined spray bar.
To determine spray bar identification
1. The standard spray bar is completely round as you look down the carburetor. The bar is a uniform .155" in diameter.
2. The preferred bar has flat sides milled on each side .098" across and .336" long from the end.
3. I believe that it would be possible to modify a standard spray bar to those dimensions relatively easy. WARNING: If you grind too deep, you will break through to the fuel passage and ruin a perfectly good $15.00 So be careful!!!!!! This is brass!
This, on a 13x6 prop was good for 400 RPM on a piped ST 90
My piped and old ST 90 turns 13000 with 15% with above carb.
I changed to an ASP 108 carb,which is a clone of the OS 7D, but half the price. Note, some of them have a restrictor sleeve. Remove it! I gained 600 RPM, yes with a pipe!!! and Tach. Same day, engine and fuel.
This was too fast as it screamed on the dives. Changed to MA 14x6 and hit 12,700...for two years so far.
I prefer synthetic only as I had problems with varnish at these performance levels. This works and the engine lives is still running with I have no idea how many gallons of fuel.
My two cents!!

(in reply to danielfd)
       Post #: 13

Hey Twinman - 1/26/2002 7:19:35 AM   
ChuckAuger



Posts: 5134
Joined: 12/5/2001
From: Pampa, TX, USA
Status: offline 		Do you ever fly at Space City field??

I have a buddy who lives in Katy..his son and I fly combat (well everything, really) together and I have been to this field. I'd like to whup the Duellist out down there..that is a nice field...


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       Post #: 14

Space City - 1/26/2002 7:42:22 AM   
twinman



Posts: 1628
Joined: 1/19/2002
From: Katy, TX, USA
Status: offline 		Yes, is only 8 miles from house. Normally fly at scobie field in George Bush reservoir as is closer and concrete runway. OK so I am spoiled!!Am member of BC flyers. Our website is http://www.bcflyers.com/sys-tmpl/door/
Come on down!!!!

(in reply to danielfd)