ST 90-APC 14 x 8 someone?
07-17-2008, 05:12 PM
#1
Thread Starter
ST 90-APC 14 x 8 someone?
Hi all, just a simple and quick question
im using a ST 90 with 13x8 for pattern.....but would like to try a 14x8.....is it too much?
5% nitro
any experience?
thanks
im using a ST 90 with 13x8 for pattern.....but would like to try a 14x8.....is it too much?
5% nitro
any experience?
thanks
07-17-2008, 09:43 PM
#2
Join Date: Jul 2006
Location: Ossining,
NY
Posts: 2,819
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
ORIGINAL: xcead
Hi all, just a simple and quick question
im using a ST 90 with 13x8 for pattern.....but would like to try a 14x8.....is it too much?
5% nitro
any experience?
thanks
Hi all, just a simple and quick question
im using a ST 90 with 13x8 for pattern.....but would like to try a 14x8.....is it too much?
5% nitro
any experience?
thanks
In which model are you using the engine? Anything more than about 7.5 lbs AUW and the vertical starts to suffer badly with a 2-stroke of this size.
07-17-2008, 11:27 PM
#3
Senior Member
My Feedback: (102)
Join Date: Nov 2007
Location: Transylvania,
LA
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
My 8.2 pound (dry) Model Tech Joss Stik w/ mid wing mod, flew straight up and outa sight with a cowled/inverted ST S90K/Magic Muffler using one of the older (not blunt edged) Zinger 14~8s. Ran it on 0% to 5% fuel. I wanted to make the plane fly at a constant speed and it flew at around 80mph in all (level, up, down) directions.
Have all the parts to build another one some day.
Terry in LP
07-18-2008, 06:38 AM
#4
Join Date: Jul 2006
Location: Ossining,
NY
Posts: 2,819
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
ORIGINAL: frugalme
My 8.2 pound (dry) Model Tech Joss Stik w/ mid wing mod, flew straight up and outa sight with a cowled/inverted ST S90K/Magic Muffler using one of the older (not blunt edged) Zinger 14~8s. Ran it on 0% to 5% fuel. I wanted to make the plane fly at a constant speed and it flew at around 80mph in all (level, up, down) directions.
Have all the parts to build another one some day.
Terry in LP
My 8.2 pound (dry) Model Tech Joss Stik w/ mid wing mod, flew straight up and outa sight with a cowled/inverted ST S90K/Magic Muffler using one of the older (not blunt edged) Zinger 14~8s. Ran it on 0% to 5% fuel. I wanted to make the plane fly at a constant speed and it flew at around 80mph in all (level, up, down) directions.
Have all the parts to build another one some day.
Terry in LP
07-18-2008, 09:27 AM
#5
Thread Starter
RE: ST 90-APC 14 x 8 someone?
cool.....I just bought it this morning
the engine flyies on an epsilon 90
tomorrow...flight test
thanks a lot
ill keep you informed!!
the engine flyies on an epsilon 90
tomorrow...flight test
thanks a lot
ill keep you informed!!
07-18-2008, 10:28 AM
#6
Senior Member
My Feedback: (102)
Join Date: Nov 2007
Location: Transylvania,
LA
Posts: 609
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
xcead,
The Magic Muffler is more like an earlier version of a Nelson or Jett muffler. It has less volume though like a Weston. Still gives a boost. IIRC my S90K was turning 9000+ even with an air filter.
Have a good flight on the new plane.
Terry in LP
The Magic Muffler is more like an earlier version of a Nelson or Jett muffler. It has less volume though like a Weston. Still gives a boost. IIRC my S90K was turning 9000+ even with an air filter.
Have a good flight on the new plane.
Terry in LP
07-18-2008, 10:41 AM
#7
Senior Member
My Feedback: (18)
Join Date: Jan 2004
Location: Formosa, ARGENTINA
Posts: 2,370
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
I have an epsilon with an ST90 and prefer a 14X6 prop MA or APC.
I have flown with a 13X6 as well and liked it, its a bit faster.
This combo has good power for pattern.
I have flown with a 13X6 as well and liked it, its a bit faster.
This combo has good power for pattern.
07-18-2008, 12:17 PM
#8
Thread Starter
RE: ST 90-APC 14 x 8 someone?
yes, i've tried 13x6 for break in
then 13x8..but it was a bit fast, and at low RPM, the prop doesnt tracks well
also tried 13x10 of a friend, but was tooo much
I hope, 14x8 could be the one, tracking at low RPM, and smaller enough for the engine to handle
then 13x8..but it was a bit fast, and at low RPM, the prop doesnt tracks well
also tried 13x10 of a friend, but was tooo much
I hope, 14x8 could be the one, tracking at low RPM, and smaller enough for the engine to handle
07-18-2008, 01:06 PM
#9
Senior Member
My Feedback: (18)
Join Date: Jan 2004
Location: Formosa, ARGENTINA
Posts: 2,370
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
I think it will be a little big and the transition will suffer a bit, but theres no harm in trying.
The 14X6 is good middle ground for torque and speed.
The 14X6 is good middle ground for torque and speed.
07-20-2008, 01:19 PM
#11
Thread Starter
RE: ST 90-APC 14 x 8 someone?
I flew tested the prop yesterday
the plane flew slower...i love it!
vertical dive was very slow!!! perfect!
vertical pull....was a bit better than the 13x8, but didnt reach too many RPM as expected, not unlimitted...but enough for the sequence im flying
and for gringo flyer, yes the transition was "heavy", but few more flights will tell the truth
the plane flew slower...i love it!
vertical dive was very slow!!! perfect!
vertical pull....was a bit better than the 13x8, but didnt reach too many RPM as expected, not unlimitted...but enough for the sequence im flying
and for gringo flyer, yes the transition was "heavy", but few more flights will tell the truth
07-20-2008, 01:23 PM
#12
Senior Member
My Feedback: (18)
Join Date: Jan 2004
Location: Formosa, ARGENTINA
Posts: 2,370
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
I'm not trying to harp on the other prop but with a ST 90 with 5% dynamix and 14X6 MA prop I have unlimited vertical on my epsilon.
07-26-2008, 06:51 PM
#14
Senior Member
My Feedback: (18)
Join Date: Jan 2004
Location: Formosa, ARGENTINA
Posts: 2,370
Likes: 0
Received 0 Likes
on
0 Posts
RE: ST 90-APC 14 x 8 someone?
ORIGINAL: Rendegade
An MA prop on a pattern ship? Ooh , would be a bit loud wouldn't it?
An MA prop on a pattern ship? Ooh , would be a bit loud wouldn't it?
The pattern contest he would be flying with the Epsilon here in Argentina I dont think will have a noise limit. Our local contest wont.
