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Engine basics => Engine set up tips => Topic started by: Ron Varnas on March 27, 2006, 06:08:03 AM

Title: OS 40 FP v D/S 40 v Brodak 40
Post by: Ron Varnas on March 27, 2006, 06:08:03 AM

I'd like some info. on the power "out-put" of the 3 most popular S/E 40's,
being the OS 40 FP ( Reworked) , Double Star 40 and the Brodak 40.
yes they are all 40's in displacement but I'm sure there would be one that stands
out as having more "torque" if I can put it that way ;)

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: Bill Little on March 27, 2006, 06:39:09 AM

Hi Ron,
The 40FPs that I have had reworked had the most raw "power", and would pull the most, but I have not found a real great difference between them all.  Especially if you open up the tiny stock DS venturi.  In stock form the DS was the weakest, but had the best 4-2 break. 

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: RandySmith on March 27, 2006, 11:10:03 AM

Hi Ron

A properly setup FP  or  LA 40 has  way more power and torque than a DS 40, which has about the same power as a good  FOX 35

Regards
Randy

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: peabody on March 27, 2006, 08:05:05 PM

From what I have observed, the Brodak 40 has about the same "moxie" as a good modified FP .40.....
I have a few Magnum .40'ABCs that Randy did and they are terrific!
I'm not a big fan of the DS, although some have good luck.
If it was up to me, the B-40, because of it's light weight, is the hot set-up...
Or send Randy an FP.

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: Ron Varnas on March 28, 2006, 12:16:04 AM

Hi guy's, interesting responses already ;)
Ok my thoughts about the DS 40 seem confirmed by Randy's reply,
that is their power & torque output is in Fox 35 ballpark:)
that leaves the 40 FP (fully - reworked) v the Brodak 40,
I think the FP has a bit of an advantage over the B40 as it's been around
for quite a few years now and the rework technique tried & proven, whereas
what I've heard & read about the B40 is more about the early quality issues
as far as outright power comparisions to the FP it maybe still a darkhorse against
the FP...........I'm not sure, but I'll wait for some more responses about these 2 motors.
As far as the DS is concerned, well I've heard nothing but praise for their quality,
Peabody is on the mark about the Magnum 40 ABC , but I'm more interested in these 3 motors that produce the traditional 4-2-4 run.
The later ABC motors are in a different leauge again, Mag 40 & Mag 36 from what
I've read run more of a constant wet 2 stroke.........

Like to hear from B40 owners ........not the quality issues, but performance......

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: peabody on March 28, 2006, 04:50:14 AM

Ron...Seeking a "traditional" 4-2-4 run puts well reworked FP's and the B- 40 at a disadvantage....they all run best when run in a wet two cycle......

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: Ron Varnas on March 28, 2006, 05:49:28 AM

Ok, I shouldn't have metioned the word 'traditional' as it seems it's
the sole property of Tigre 46's and Foxzzz.... ::)

Though both the FP & B40 in theory should at least  give a slight 4-2 break........
if not the FP's wouldn't need liner work ?....and Brodaks would have saved heaps by using a mild timed R/C motor instead of going to lengths they did to
produce a dedicated stunt motor manufactured in Eastern Europe.

As I mentioned on a earlier post........interested in hearing about the power
output of the B40......not the quality topics about them either, if it was a quality
'shoot - out' one of the all- time traditional (4-2) motors (F..)...... would win hands down! :-\

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: john e. holliday on March 29, 2006, 08:43:53 PM

I guess you really want to know what the B-40 would fly.  I have had mine in the Brodak Olympic which was a great combination on 65' lines .015.  After the demise of the Olypic the engine has been in the profile Brodak Mauler and is way too much power.  I now have a stock muffler on it again as I was trying to make it work with Fox muffler.  It did work tho.  I seen several B-40's at VSC this that were working great.  By the way they were using the Widser 11-4.5 prop that Richard Oliver now has.  Later,  DOC Holliday

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: Ron Varnas on March 30, 2006, 12:43:00 AM

Hi Doc, good info there on your Brodak 40, ...did you manage to find out
any particular set-ups that were used on the good running Brodaks at the VSC?

Title: Re: OS 40 FP v D/S 40 v Brodak 40
Post by: Mike Clark on March 30, 2006, 04:05:49 PM

Hi Guys,
The Retimed FP40 has no equal on the output of power when running a 4/2 break.
Well now hold on, I know there will be cackling going on but my PA40 did not cost $100.00 either. That should be the extent of the engine cost and upgrade of the FP40.

Most of the times and depending on the engine reman guy the boost block is blocked and the timming trimmed to provide MORE power at the lower RPM range. This will provide the flyer with more grunt at the lower end while flying around in the four stroke mode. You gotta love those 12/5 ot 12/ 6 props and 5/22 fuel. Vrooooom.

Mike Clark