The "DL 100" gas engine - NOT an imitation of another engine, but a very good reed twin cylinder. It also comes with an RC-EXCELL ignition, V.2.0, which works reliably and well on voltage up to a 2S Lithium Poly (7.4 v) [must use regulator if above 6.6 v].
UPDATE !! - I experienced ignition module failure at 9 flights. It is evident that either the DL 100 ignition is NOT rated the same as the RC Excel, even though it is provided by them and relabeled "DL". So I recommend the use of either a regulator, or a diode or two to reduce the chance of damage.
I have *no* evidence that over-voltage source caused this failure, but I think I should state my experience and recommend precautions as they are known to me.
GAS-OIL RATIO CHART (Printable)
For my first twin, I decided I had to have the DL 100. Based in no small part on my success with using the DL 50, and certainly it's low cost, I had to have one.
The DL 100, imported and distributed by several resellers in the US and abroad, and is a 101.6 cc engine, modeled after some of the more widely-known "purpose built" big twins RC airplane engines.
Using a Chinese industrial equipment carb, on a well-designed 4-petal reed induction system, the engine is very easy to start, adjust, and run reliably.
The twin stock mufflers are loud, but nothing makes a twin a "twin" like being able to hear that bark, so it's okay. Any headers/canisters usable on a DA 100 or similar will work fine. All mufflers and headers made for the DA 100 will fit this engine perfectly.
The engine mount is exactly the same footprint as the DA 100, and mounts just as easily to a flat firewall with 1/4-20 bolts. One of the things I like about this engine is the "bolt up and go" installation that is so easy.
Turning a JXF 27 x 10 right now; didn't take rpm readings yet.
![]() |
![]() |
![]() |
| Mounted up! | Closeup of intake manifold/reed | Carb Close up |
![]() |
||
| DL Ignition (Relabeled RC Excel) | ||