3dsky

My Feedback: (84)

fujiman

The MLD 28 would work amd you would not have to add lead to the nose. If you go with the MLD post a picture.

lospeed

Question, Im looking to get started in Gas engines myself, and my biggest question is the battery/ignition:

1) what is the best battery to use Li-po or Ni-Cd for the ignition system?
2) how long does the battery last for the ignition, on average?
(Will I have to charge it between every flight)
3) Any suggestions/hints that you can share w/ a newbie on igition would be great.

From everything Ive read, it looks like the carb tuning and ignition are the only significant differences from Gas or glow and I really like the MLD 28. It seems to be the lightest gas engine (in its class) and has the most power (in its class) and is American made w/ a reasonable price tag. I am very interested in getting gas engine for my next plane.

togatoga

My Feedback: (42)

I suspect the MLD28 to be similar to the SPE26 in all respects except that the only difference being a new head, piston and ring. The Crankcase,prop shaft and driver ,muffler and ignition unit look similar.
Basically an overbored design.Sourcing for parts is difficult.
I stand corrected.

reynolds74

Sorry to tell you that is all but American made....
This doesn't mean is not a good engine. Looking to buy one myself.

Springer

My Feedback: (1)

Will Cermark be at the WRAM Show in NY at the end of next month? The WRAM site didn't post a current list of vendors last year until very close to the show date. It would be great to see the full engine line up.

3dsky

My Feedback: (84)

Posting pictures of my MLD 28 with J'TEC wrap around Pitts Muffler SPE 26. I have used J'TEC's mufflers before and have no problems. The muffler fits the MLD 28 & SPE 26. JTECH RADIOWAVE's web site is www.jtecrc.com

stevenchao

Hi 3dsky,

Can post the the rpm # that you get from MLD28 with JTec Pitts muffler (larger expansion chamber + TIG welds) online? Thx.

Peace,
Steven Chao,
CERMARK

stevenchao

"Will Cermark be at the WRAM Show in NY at the end of next month?"

We love Lou over at WRAM, but our schedule got us wrapped us backwards every tradeshow season. We were hoping that we will show up there with the DPM product as debute this year. It is not happening. The DPM project is way behind the original estimation. Hope we can help you some other way. If you out in the Jersey area, one of our sponsored pilot, Benny Chi, has one of these engine. Benny is very easy going person, you guys may know his son, Justin Chi (a very young pilot).


Peace,
Steven Chao,
CERMARK

justdontcrash

Hello everybody and great info on this engine just not the info i'm looking for...hahaha. Has anybody put this thing in a Hanger 9 1.50 Mustang? I have one with a saito 1.80 I'd like to replace with a gasser. I've built a few gas planes lately and holy hell, much better than nitro if you ask me. I know the AUW is almost exactly the same and it will fly this plane but I do like the scale apperance with virtually no cutouts in the cowl so I am just curious how well it fits in the cowl and if any firewall mods are needed. Any help is greatly appreciated.
Thanks
Jay

autoglide

Steve,

Any plans to attend Weak Signals Expo in Toledo OH?

What ignition battery/runtime numbers do you have/recomend?

Jimeni

I'm not Steve, but. I'm running an SPE 26cc, basically same ignition and requirements. I am using a 7.4 1350 mah lipo battery, and after about 8 flights, a check with a volt meter shows I have used .2 to .4 volts. You could easily go with a lighter battery, and fly all day long. A 7.4 volt 1000 or 1100 mah lipo would be ideal.

jamesrxx951

i talked to steve on this very question and he highly recomemded not to use anything over 6v. he said that there was a higher failure rate going over. so a 4.8 nimh pack was best. call him very informative.

BarracudaHockey

My Feedback: (11)

I'm running a 4 cell, 1500mah sub-c on mine.

I haven't done the math but I haven't had to pack it in for a dead ignition battery yet.

Springer

My Feedback: (1)

Can an A123 pack be used for the ignition? If 6 Volts is max I am guessing no. One of the small packs would be great if it is safe. If not is there a small simple regulator that can be used?

Jimeni

Steve will tell you that the current ignition unit can safely and reliably handle 8 volts. Specs say up to 18 volts. There is going to be an ignition upgrade with future engines that will require a voltage regulator for batteries over 6 volts.

stevenchao

1. We will be at Toledo (Weak Signals 55th Toledo R/C Expo). We have changed our location though. I believe our booth # will be 224-227. [http://www.toledoshow.com/index.cfm?p=TSexhibitors]
2. Ignition battery pack: I often forget (age factor) that people use LiPo, A123 and LiMn... We recommend using battery packs ranging from 4.8V to 8.0V. So 4, 5, 6 cell NiCD and NiMH will be fine. 2s A123, LiPo and LiMn are also fine.

Sorry to have created such confusion. I must have not remembered to have mentioned LiPo, A123 or LiMn to some of the customers who called. Thanks Jimeni for catching my error.


Peace,
Steven Chao,
CERMARK

autoglide

Thanks Steve and everyone else for the replies. Follow up question if you will, what are your thoughts on battery current capasity. I will like to use a light weigh battery, but that means less current. Any mAh capasity recomendations for a 7.4V LiPo?

Will you have engines for sale at Toledo?

Thanks

Jimeni

1100 to 1300 mah will fly you all day long and then some, with this ignition set up.

autoglide

Thanks Jimeni!

autoglide

Jimeni,

I just realized you are from Carrollton, OH? I go to Carroll Co Airp. every now and then. Visit the coffe shop there, excellent pies! Nice country scenery!

Lifer

My Feedback: (1)

Can someone give me the length of the 28cc with the standoffs attached to the thrust washer? Thanks!

autoglide

About 6.25 in if I'm right. Check the Cermark web site for the specs.

http://www.cermark.com/products/MLD%...ne-Engine.html

Jimeni

I'm in West Carrollton, near Dayton.

3dsky

My Feedback: (84)

Lifer

With stock (in box) standoffs mine is 5.25 inches. Cermark lists different length standoffs on the web site.

Web site list 5.0 inches, I have 2 MLD 28 both are 5.25 inches form the spinner backplate to the end of the standoffs.

Lifer

My Feedback: (1)

3DSky,

Thank you for your efforts! Hope I can repay you somehow. Good landings!