Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)
View Poll Results: A poll
JETT 30 BSE FIRE
6.67%
JETT SS .40
13.33%
JETT SJ .50
80.00%
Voters: 15. You may not vote on this poll

What Jett for SIG Kobra ??

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Old 01-06-2009, 11:48 PM
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Crazy4Flight
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Default What Jett for SIG Kobra ??

I bought a well built very clean SIG Kobra. Fixed gear taildragger

Recommended Engines .19-.35 in³

What Jett shall I put on it ??
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Old 01-06-2009, 11:57 PM
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petec
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Default RE: What Jett for SIG Kobra ??

As those who would frequent my garage came to learn back in my drag racing days.

The only substitute for cubic inches is cubic feet.....
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Old 01-07-2009, 01:50 AM
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Default RE: What Jett for SIG Kobra ??

Easy , the .50
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Old 01-07-2009, 03:07 AM
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Default RE: What Jett for SIG Kobra ??

No replacement for displacement

I vote for the SJ50
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Old 01-07-2009, 05:01 AM
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rmenke
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Default RE: What Jett for SIG Kobra ??


CRAZY:

Like so many of the guys point out, "there is no substitute for cubic inches (feet)". Quit drinking beer for a month and break doen and buy a Jett 60LX and a black pipe. I liked the first one so much I snuck in a second one. Still the same Jett idle and needle range, but tons of rpm's. Darn things dont weigh any more than the 50. I dont have a 50 LX, just a 50 L. The 60 LX eats the 50 for lunch. The 60LX does have a little problem, the original batch ate plugs, problem now solved with a new head button. Bubbles, even with a bubbleless tank are tough to stop. I mount my needle on the plane behind the motor and in addition, use that strange OS tank clunk filter thingy I found in the Tower parts store. Dang thing is $12.00, but seems to work great on a regular tank. Regardless of what you do, let us know how she does. I am looking for a sweet home for my 35. The home brew "Yellow Jacket" is over 5 lbs. in epoxie repairs and fuel, so retired. Thinking about a Modeltech "Fun Fighter"with one of the new micro air retracts. Ordered one from Hobby King yesterday, $59.00 to see how the quality is. Light enough to use on foamys. ENJOY
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Old 01-07-2009, 07:56 AM
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Default RE: What Jett for SIG Kobra ??

rmenke,what os clunk thingy are you talking about.?i also stick a very thin piece of foam behind the remote needle valve to help w/ the bubbles-vibration problem. it helpe
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Old 01-07-2009, 08:09 AM
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Default RE: What Jett for SIG Kobra ??

On this forum, unless the absolute largest most lunatic engine possible is included in the poll, the answers might be suspect..

SJ60LX

SJ50

or.. if you are fond of the smaller block engines why not the BSE .35?

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Old 01-07-2009, 08:54 AM
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Default RE: What Jett for SIG Kobra ??

That would probably make a good home for the lonely SS40 if mounting it is not an issue.

Smaller prop, let it scream a bit.
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Old 01-07-2009, 09:43 AM
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Default RE: What Jett for SIG Kobra ??


ORIGINAL: bob27s

That would probably make a good home for the lonely SS40 if mounting it is not an issue.

Smaller prop, let it scream a bit.
That's a small (.25) block engine too, right?
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Old 01-07-2009, 09:53 AM
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Default RE: What Jett for SIG Kobra ??

Motor mount needs to be changed...

40 SS is the larger block, like the Sport Jett .40 .46 .50 .60LX.

retracts? No, Had too many nose overs with Robart mechanicals on my last Kobra.
The wheels to close to CG, kept grinding the prop down on the pavement.

I am going to use a side exhaler, less cutting involved.
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Old 01-07-2009, 10:37 AM
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Default RE: What Jett for SIG Kobra ??


ORIGINAL: MJD


ORIGINAL: bob27s

That would probably make a good home for the lonely SS40 if mounting it is not an issue.

Smaller prop, let it scream a bit.
That's a small (.25) block engine too, right?
No, the SS is the "old" sport racing engine - same as the .46-.50-.60L
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Old 01-07-2009, 10:56 AM
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Default RE: What Jett for SIG Kobra ??


ORIGINAL: bob27s

No, the SS is the "old" sport racing engine - same as the .46-.50-.60L
Oh right, silly me. Oh well then, 60LX all the way! Um, or.. SS40!

Sounds fun, I mean to get a Kobra some time. Just make it fast so you'll be allowed to fly it and tell us about it here; nothing under 100 is allowed. [>:]

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Old 01-08-2009, 02:51 PM
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rmenke
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Default RE: What Jett for SIG Kobra ??

russm:

Answered you yesterday, but for some reason did not get posted. Anyway, the OS clunk at tower is apparently a dropped item probably due to cost, a similar DuBro filter clunk is $2.39 as opposed to the $12. OS. Yea, the OS does work which is why they probably have the thing so overpriced. I only have one and will be looking for another soon, will post it on our thread if found. Sorry!!!

Did a little search and found the things at "Powergrunthobbies" except their price for the OS thing is $15.00, but they also list a copy for $5.00. No OS part number found.
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Old 01-09-2009, 07:36 AM
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Default RE: What Jett for SIG Kobra ??

$15.99 and still available at at this point according to Tower; (seriously, I have got to get into the habit of stripping my my arfs when I sell them}. Tower part # LXXF25
OSM part # ? If that does not work, then OS does not seem to list them anymore.... I quit my work for the LHS so I could be wrong...
Best Wishes, C.R.

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