REAL STUNT, POWER SYSTEMS
CARE & FEEDING
RIGHT STUFF FOR REAL STUNT
Have you seen the ad in Tower's catalog for OS FP engines? Says, "Build to run one way . . . FAST!" They're right! If you've experienced the dreaded "run-away" on OS FP, or LA engines, and want it to run right for stunt, I can fix it. In 1984, I developed the liner re-timing that tames these engines. Others are only now catching on. Allow one week turnaround after I receive your engine. Setup instructions included. Send the engine PRIORITY MAIL to:
RIGHT STUFF PACKAGE - OS FP, OS LA -- .25 through .46, ST-51, tower 40
POWER SYSTEMS FOR STUNT
DOUBLE STAR ENGINES
Double Star 40
Tongue Muffler - .4 oz
Double Star Engines General Operating Information
FUEL: All Double Star engines are of aluminum, aluminum chrome (AAC) construction. As such, they need less oil than traditional control line stunt engines. I use, recommend, and sell Sig Fuels for use in these engines. All castor, or high castor content fuels can cause overcooling, rough running, and even, paradoxically, overheating and lean two cycle running. This is because the needle has to be set very lean for the engine to run at all on high castor fuels. Set this way, less overall fuel flows through the engine, which contributes to overheating. Alcohol in our fuel acts as a coolant as it flows through the engine. At lean needle settings, less alcohol goes through the engine.
GLOW PLUGS: I have tested nearly every glow plug on the market, and the result is that the Sig R/C plug (p/n GP003) is clearly superior. This plug is supplied as original equipment in Double Star engines. Nearly all other glow plugs, including some popular brands, cause a power loss and sensitivity to needle settings. Stick with the Sig plugs, no matter what your experience (or your local expert) tells you. Trust me on this! The Sig R/C plug also improves performance of just about every other engine, including OS and Saito 4 strokes.
PROPS: The best props I've ever used are Bollys in the appropriate size. Second-best are the newest B-Y&Os. Third-best are cleaned-up trued Zingers. Zingers tend to load an engine more for a given size. For example, a 10x6W Zinger loads an engine about like an 11x6 Bolly.
BREAK-IN: None. People think I'm kidding. I'm not. I mean it, when I say, "Put it in the plane and fly it". On the ground, the engine does not experience the same cooling and loads as it does in the air. Ground break-in of a Double Star can actually cause premature wear. You don't break in your new car by letting it idle in your driveway, do you?
PROBLEMS: If you have a problem with a Double Star, call me, not your local buddy who has never run one and has nothing invested; however, don't call me -don't even buy a Double Star, if you:
1. Make your own fuel.
DOUBLE STAR CLASSIC 40 - This engine is based on the Fox .35, but with greater bore and stroke, AAC construction, and now comes with its own muffler. A direct swap into Fox mounts, it weighs the same too. It easily turns 11X5 and 11X6 props on 5% nitro, and works best in 42 to 52 oz. models.
Double Star Classic
DOUBLE STAR CLASSIC 50 - The classic 50, based on the Tigre G-21 .46, is a direct swap into Tigre mounts. It weighs 8oz. with bushing shaft and AAC style piston/sleeve. Works well in 48 to 58 oz. models such as the larger Classic models (T-Bird, NAKKE, etc.), or such as the Stiletto 660. It is delivered with DS lightweight tube-type muffler.
Double Star Classic
DOUBLE STAR 60 LITE-RING - This engine is the 60 LITE with a ringed piston and "bridged" sleeve ports to suit the ring. It is aimed at the competition flyer who practices heavily, as the ring gives instant starts when the engine is still hot from a prior flight. This version was suggested by Bob Baron, and he used the prototype at the '98 Nats.
Double Star 60
DOUBLE STAR 60 BB - The original DS engine updated with AAC technology, instead of the previous ABC, saving 37 grams. Otherwise, it's a copy of the Tigre .60 and totally duplicates its performance and character. Comes with light weight DS tube muffler.
Double Star 60 BB
Double Star 61 LRE - The DS 61 LRE is the ringed, rear exhaust offering in the Double Star line. This is a very powerful, but classic running, stunt engine which is also incredibly fuel efficient, thanks to it’s unique porting arrangement. Weight, with included muffler, is about the same as a ST.60 without muffler. It makes a great engine for scale type models, as the muffler can be hidden in the fuselage.
DIXON CUSTOM FOX 35 - Engines are carefully fitted and various subtle changes are made to gas flow to increase power and smoothness. The crankshaft is re-balanced to reduce vibration, socket screws are used for re-assembly, and each is test-run before shipping. 100's of Custom Fox .35's have been purchased over the last few years. And . . . everyone kept thinking the one used in my Nobler was a .40.
Dixon Custom Fox 35
Dixon LA .46: I feel like this the best overall control line stunt engine for those new to the sport, or those people who want a "set it and forget it" engine. It is tolerant of different fuels and props, and works very well on profile models like the Brodak Cardinal. I re-time the sleeve to get a classic "4-2-4" type run at lower RPM than a stock motor, and with more torque. Additionally, I add a Double Star NVA to the traditional venturi location, a SIG R/C glow plug, and a Double Star tongue muffler. Each engine is test run before shipping. Between OS FP's and LA's, I have done over 300 engines.....Never had a complaint or got one back!
Modifications Of Your Engine
I am still providing re-work services on OS-FP and LA engines supplies by customers. (Some other engines can also be re-worked.) My modifications allow the engine to run in a traditional 4-2-4 manner at lower RPM, allowing use of 5" or 6" pitch propellers. Most people find this type of run to be more pleasant, more "traditional", and there is no need for special carbon fiber low-pitch propellers. Most wood propellers on the market will work just fine.
The FP-LA re-work consists of:
Total Price $80.00 per engine
Send the engine, Priority Mail, to:
Payment can be made by
cash, check or money order.
All OS-FP or LA engines, from .15 to .46, can be re-worked. (The LA 60 is too heavy to be useful.)
Turn-around time is usually within five days from the time I receive the engine.
50" span, 510 sq. in. area, thick airfoil. Perfect for Double Star .40 or OS .40FP-s
KIT PRICE $150.00 + $15.00 Sh & H (USA & Can.)