Does any of you know of a place to look up engine weights? Without having to go through the whole RETAILER/MANUFACTURE web pages?

If not how would we go about setting a page/forum up for this?
There is many times That we are considering a engine of a certain make/manufacture but want to compare weights of like size.

RON in NEVADA

Hi Ron,

Yes, I agree that this would be very handy and useful, and that's why I started a movement last year to develop such a DB. Cliff at RC FAQ has taken over the collection of data and has "threatened" to get the DB built and published, but he is very busy and hasn't gotten it online yet.

On the RC FAQ home page (www.rcfaq.com) there is a link to submit numbers to add to the DB. Everyone that is interested in this info, please write Cliff and encourage him to get it published.

Everyone that has an engine they can weigh and submit actual numbers, please do. The DB is setup to gather the bare engine weight, mount weight(if separate), muffler weight(and brand), ignition weight(and brand), and total weight with all of these components.

Cliff's e-mail is: [email protected]

SUBMIT YOUR DATA and/or BUG HIM! This info can help everyone out. Multiple people submitting data for the same motor is great. It will give a good point of reference.

Ron, the May 2002 issue of Model Airplane News has a very good article on gas engines. It has specifications on most of the popular engines available today including weights.

KEN in TEXAS

Hi Ken,

That is a very useful article, but not very valuable for comparing engine weights. The issue is that manufacturers don't have a standard for weighing engines. Most weigh them bare, some with the spark plug, some with the mount, some with the prop washer and nut, some with the muffler, some with the ignition....and any combo of the above.....and they almost never say what the weights they do publish include, or don't include.

That's the problem. To get real numbers for comparison, you need actual weights with a standard set of components, which is what we're trying to achieve with the weight database on RCFaq.

BILL,

You're right! The manufactures use whatever suits THEIR purpose. and of course that's whatever makes their engines stand out above the others.

We need to do it here! (hint hint RCUDMIN)

It is something we can use for any size of engine. and we all know it could be a forum all of it's own.


I would be willing to help as I can!

RON in NEVADA

Model Airplane News! Just got it and has all kinds of information about gas engine.

Bill, I'm in total agreement with you on the engine weights. I think the MAN article has a fair number of inaccuracies but it was very interesting. I would like to see the manufacturer to weigh an engine with every engine componenent required to make it fly on an airplane less the prop and battery (for battery powered ignition systems). These items have variable weight.

I think some of the engine manufactures went to the same school as the kit manufacturers when they were taught how to specify the weight of their kits.

Ken

I'll bet theres a fair number of engine owners here, we could come up with a lot of numbers ourselves.
I've got a DA100, BME102, and ZDZ80RV and a digital scale accurate to 1 gram, I can get those weights if needed.

Hi all...I've always wondered why someone hasen't modified the Zenoha engines like some have done with chainsaw and weedwhip engines....everybody usually agrees they are powerful motors but weigh to much compared to the other popular brands...seem to me if one were to take a G62 and take off both of the coils and the flywheel, remove some of the lower fins, cut of the usless crankshaft that sticks out the back of the engine..(you know the one you have to cut a hole in the firewall for) and instal an electric ignition with a syncrospark then you could get the engine weight down comparable to a, say ZDZ60. I have two G62's and would voluntere one if someone could do the machining. I dont have a mill or lathe etc...oh yeah and why does CH use one of the coils with there ignitions only for the Zenohas? why not the same one as say a Brison. If this has been discused before...and it probably has could you point me to the discussion group...Thanks

Ron

Hello Gjestico:
Nice looking custom muffler on your website! I've got a H9 Cap with a ZDZ-80 single that could use a similar muffler if it's quiet and retains the performance of the J&A Peace-Destroyer. Since you also have the ZDZ, have you developed a muffler for it yet? I think the large volume can would be the hot ticket. Let us know because there are a lot of people waiting for a better product.

Diablo,
Thanks for the compliment. That system seen on my website on the Hanger 9 Extra/BME102 made 90 DB at 25 feet, at 6300 rpm on a RCS 26/10. Thats down about 200 rpm from the stock JA's which made 94 DB at 25 feet. That plane combo was so fun that a local fellow bought the plane a few weeks ago. Since then I have done some more fabricating of test mufflers but no hard testing yet. I believe I can get some of the 200 R's back with the same low DB's with the newer baffle design.
I had a ZDZ80 single on order for two months, just got it a week ago. I also picked up a Hanger 9 33% Cap on sale too.
This seems to be a popular combo. I anticipate if I can get the DB's down to a respectable level it will be the answer for many such combos. I'll let you know the results, Should have some numbers in a couple of weeks

Hi Ron, Ken and gjestico,

It would be nice to have a DB here and be able to enter weights that can easily be compared, but I don't think it is practical with the RCU interface. A thread interface is just not what is needed. A searchable database is needed, such as Cliff is creating on RCFaq. I would be glad to dig up and re-post the numbers I have that I have entered in RCFaq's DB, but I think the effort should be put into the RCFaq DB. If that DB is put online then there's nothing to stop Marc from starting a forum(like the shipping one) that has a link to the RCFaq DB. In fact it would be nice to have a link to the RPM database on RCFaq too.

I open to whatever everyone wants to do, but I'd sure like to get this going and have the numbers available.

On RCFaq the DB contains the following fields:

Name:
Location: (City & State or country)
Engine Mfr: (i.e. OS, Thunder Tiger, Super Tigre, BME, 3W, etc.)
Engine Model: (i.e. .46FX, .46 Pro, 2300, 102, 80, etc.)
Engine Weight: (in ounces, BARE engine)
Displacement: (in CC's.)
Muffler brand: (i.e. Slimline, OS, or just STOCK, etc.)
Muffler weight: (in ounces)
Mount Brand & size:
Mount weight:
Ignition weight: (WithOUT battery)
Total weight: Total weight, ready to fly, minus battery, prop & prop nut
Additional Info: Did you include the prop nut, glow plug or spark plug?
Confidence: (1=bathroom scale, I think that's what it said...5=I used a calibrated lab scale, and wrote it down immediately.)

Flatspin..I started modifying Zenoah engines 15 years age, all the things in your post. A modified G62 weighs about 4 lbs....
With all the hype about newer engines the old standbys get overlooked...Some of my G62s are 15 years old and still going...

rcign wrote:

>>I started modifying Zenoah engines 15 years age

I knew G-62's had been around a long time, but I didn't know they had them back in the stone age.

Flatspin- I stripped a G62 down to exactly 4 lbs.
then used a electronic ingnition.
power was the same- vibration was the same - I got rid of it -after I compared it to a ZDZ60 -
I don't hate Zenoah's but the difference in power and smoothness was a demonstration of how much design refinement has done for these engines.
Jestico - The 80 zdz/cap combo is popular-for good reason - it is the lightest combo -and most power to weight - cheapest and - it works!
To lick the noise - I used the short tuned can and a 26x12 MenzS (6250-6300 ) very little prop rip now

Hello Gjestico:
Thanks for the muffler update. Glad to hear you've got my combo in the works. Some data - the ZDZ-80 with J&A Pitts tested at 101.5 dB at 25 feet over grass using the Imac method. Mejzlik 26x10 prop. If you can knock off 6 dB, you're my hero.

Very interesting guys...If we had a weight DB for all engines and accessorys, what would we argue about??? OH Yeah, only about a million other things pertaining to this addictive hobby. 8^)

Ron