Bipenut53
150cc
Hello all,
Well this review has been a while in coming. It is for the EME 70cc Twin cylinder engine.
I bought this engine from Mile High RC All I can say is these guys are great people and support their products very well. I bought it from them about 10 months ago for my 91" Extreme Flight Extra 300 EXP. I was looking for an engine for this airplane because I knew it would take a bit more power than your typical 50cc engine. First off here is a little bit about the engine from the website:
Some cool things about the EME 70
Walbro Carb
Ceramic coated cylinders
NSK main bearings
IKO rod bearings
Rcexl HV (6-12V) Ignition.
Only 250mm Plug Cap to Plug Cap
Same foot print as EME55/60 (DLE55)
Same prop bolt pattern as EME55/60 (DLE55)
18 Month warranty serviced right here by Mile High RC.
Our customers also receive cost plus 10% for parts that would be non warranty such as crashes.
Here are the specs on the engine:
Eagle Master Engine EME 70 User
Manual
‐
3
‐
Specifications
Item Technique Data
Displacement 70 cc
Weight
1800 g/Engine, 165 g/Muffler,
190 g/Ignition Module
Compression
Ratio
7.6
Power 7.1 HP @ 7000 RPM
Idle RPM 1200 RPM
Practical RPM 1200 ~ 7500 RPM
Thrust 1 18.0 kgf (50~200 m Altitude)
Thrust 2 15.5 kgf (1800~2000 m Altitude)
Spark Plug EME / NGK CM6
Ignition Voltage 4.8 V to 12 V
Fuel
91~93 Octane
，
1:30~1:35 Mix
Ratio
So what led me to buy this engine was two things 1) The engine will fit inside my cowl without cutting holes in the cowl for the spark plugs and 2) was the price difference between them and the other 70cc twin on the market. I could buy almost 2 engines for that price!
So here are the pictures I took of the engine before mounting
The EME engine comes with a stick on template that had a circle and cross hair for proper alignment on the firewall, I took a ruler and extended the cross hairs to run the length and width of the template which made it much easier to get proper alignment, I stuck on the template decal and drilled the proper holes and they lined up perfectly. With the EME 70cc engine were included 13mm spacers (approx. 1/2"). Those proved to be too much and I found that it took approx. 1/4" spacing to get proper clearance for the cowl. Here is a picture of the decal on my firewall ready for drilling
Here is a few pictures of the engine mounted to the firewall
Here are a few pictures of the engine with the cowl installed. I did make baffling out of some hobby foam from the local craft store. It glues into the cowl easily with CA and keeps the airflow over the cylinders. I have never had a heating issue with it this way.
I did open up the canister tunnel and covers so I get airflow through the engine and still keep a nice clean look to the cowl.
I have ran that engine for one season in this airplane. I can honestly tell you that I love this engine! It idles perfectly and extremely smooth, as a twin cylinder should. I am using a Xoar 24x10 laminated prop and fuel mixture of 35:1 ratio of natural oil instead of synthetic. I have never had a no start, hard start or dead stick with this engine. The airplane turned out at 19.2 pounds fueled and ready to fly which is a great weight for the EME 70. It has plenty of power, it will hover the airplane at half throttle and has great pull out! It sounds great. If you are in the market for a 70cc twin cylinder engine I think you should give this engine some serious consideration. Do not judge it from its low price but truly from a performance stance as well. It seems that with every flight of this airplane the engine gets stronger and stronger. I have about 7 gallons of fuel through this engine and all is good. During winter maintenance I did pull the pump cover off of the Walbro carb and cleaned the fuel screen and all looks great! If you have any questions you can ask me or [MENTION=298]Outofdenver[/MENTION] Mike email address is sales@milehighrc.com
Here is a short video of my second flight and you can hear how solid this engine runs and sounds. I am sold and when I am in the market for another gas engine I will be looking at another EME engine for sure!!
[video=youtube;K1lR9Fr8HWY]https://www.youtube.com/watch?v=K1lR9Fr8HWY[/video]
Well this review has been a while in coming. It is for the EME 70cc Twin cylinder engine.
I bought this engine from Mile High RC All I can say is these guys are great people and support their products very well. I bought it from them about 10 months ago for my 91" Extreme Flight Extra 300 EXP. I was looking for an engine for this airplane because I knew it would take a bit more power than your typical 50cc engine. First off here is a little bit about the engine from the website:
Some cool things about the EME 70
Walbro Carb
Ceramic coated cylinders
NSK main bearings
IKO rod bearings
Rcexl HV (6-12V) Ignition.
Only 250mm Plug Cap to Plug Cap
Same foot print as EME55/60 (DLE55)
Same prop bolt pattern as EME55/60 (DLE55)
18 Month warranty serviced right here by Mile High RC.
Our customers also receive cost plus 10% for parts that would be non warranty such as crashes.
Here are the specs on the engine:
Eagle Master Engine EME 70 User
Manual
‐
3
‐
Specifications
Item Technique Data
Displacement 70 cc
Weight
1800 g/Engine, 165 g/Muffler,
190 g/Ignition Module
Compression
Ratio
7.6
Power 7.1 HP @ 7000 RPM
Idle RPM 1200 RPM
Practical RPM 1200 ~ 7500 RPM
Thrust 1 18.0 kgf (50~200 m Altitude)
Thrust 2 15.5 kgf (1800~2000 m Altitude)
Spark Plug EME / NGK CM6
Ignition Voltage 4.8 V to 12 V
Fuel
91~93 Octane
，
1:30~1:35 Mix
Ratio
So what led me to buy this engine was two things 1) The engine will fit inside my cowl without cutting holes in the cowl for the spark plugs and 2) was the price difference between them and the other 70cc twin on the market. I could buy almost 2 engines for that price!
So here are the pictures I took of the engine before mounting
The EME engine comes with a stick on template that had a circle and cross hair for proper alignment on the firewall, I took a ruler and extended the cross hairs to run the length and width of the template which made it much easier to get proper alignment, I stuck on the template decal and drilled the proper holes and they lined up perfectly. With the EME 70cc engine were included 13mm spacers (approx. 1/2"). Those proved to be too much and I found that it took approx. 1/4" spacing to get proper clearance for the cowl. Here is a picture of the decal on my firewall ready for drilling
Here is a few pictures of the engine mounted to the firewall
Here are a few pictures of the engine with the cowl installed. I did make baffling out of some hobby foam from the local craft store. It glues into the cowl easily with CA and keeps the airflow over the cylinders. I have never had a heating issue with it this way.
I did open up the canister tunnel and covers so I get airflow through the engine and still keep a nice clean look to the cowl.
I have ran that engine for one season in this airplane. I can honestly tell you that I love this engine! It idles perfectly and extremely smooth, as a twin cylinder should. I am using a Xoar 24x10 laminated prop and fuel mixture of 35:1 ratio of natural oil instead of synthetic. I have never had a no start, hard start or dead stick with this engine. The airplane turned out at 19.2 pounds fueled and ready to fly which is a great weight for the EME 70. It has plenty of power, it will hover the airplane at half throttle and has great pull out! It sounds great. If you are in the market for a 70cc twin cylinder engine I think you should give this engine some serious consideration. Do not judge it from its low price but truly from a performance stance as well. It seems that with every flight of this airplane the engine gets stronger and stronger. I have about 7 gallons of fuel through this engine and all is good. During winter maintenance I did pull the pump cover off of the Walbro carb and cleaned the fuel screen and all looks great! If you have any questions you can ask me or [MENTION=298]Outofdenver[/MENTION] Mike email address is sales@milehighrc.com
Here is a short video of my second flight and you can hear how solid this engine runs and sounds. I am sold and when I am in the market for another gas engine I will be looking at another EME engine for sure!!
[video=youtube;K1lR9Fr8HWY]https://www.youtube.com/watch?v=K1lR9Fr8HWY[/video]
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