rmh

anything really new in power per pound -or still just same ol stuff for less money

aussiesteve

Depends on what you mean by "new". New since when?
BME Extreme series (58 and 116) lots of power per pound but have been around for a little while now. Italian Mintors seem to have a pretty good reputation too but they have also been around a little while.

As for the rest? In general, not only the same ol stuff for less money but the same ol stuff cropping up under all sorts of new names for less money.

BME, MVVS, 3W, DA, DLE - all the same ol stuff (now) but also all excellent choices.

Tired Old Man

My Feedback: (1)

Pretty much the same ol, same ol, Bob.

How have you been, and of more concern, how are you doing?

aerobear

My Feedback: (4)

Most of the interesting comparisons of power per pound are with the new small gassers vs glow engines.

With zero break in the DLE 30 is within about 300 rpm of the OS 160 on the same pipe and prop. They are almost the same
weight. The gasser can use a much smaller tank and so take off weight is practically the same. Given the ease and
low cost of running gas most guys will pass over the glow. The DLE could easily have been made 35cc with no increase in
weight or size.

I doubt there is any development going on in larger glow engines anymore and so what we have now is likely the best we
will ever see before they go extinct and are replaced with gas or electric.

The DLE looks like a perfect fit for a 27% Dalotel. I just need to order the right header bits from KS to replace the kludge header shown.

Tired Old Man

My Feedback: (1)

Get another cowl and leave the part intact in the front that is not exposing the cylinder. I can already tell you're going to have over heating problems the way the cowl is cut now.

aerobear

My Feedback: (4)

Yes, as shown the airflow would be all wrong. The plane is not yet assembled. The pic just shows a rough cut and that the engine fits inside the cowl. Once done it will have a proper baffle job.

The cowl shown goes on a plane designed and built by rmh more than 10 years ago. At the time there were not much choice in small gas engines. The first ones of this design used the ST 2300 with lots of nitro turning around 9000 rpm. The new small gassers open up new possibilites for planes this size. Certainly on a horsepower per dollar basis the gasser wins over something burning 30% nitro.

rmh

The Frenchies opened up the rear of the cheeks on the original.
I am FINALLY finishing up the Bucker - with the ES internal pipe/ZDZ50
I can fly if Ikeep things in close (50 ft or so)
Got a new engine setup here tis
I'll let your dad sit in it if he behaves.

skip1320

http://www.troybuiltmodels.com/items/ZDZ90RV-J.html Any report on this one yet,should be a given! I should of taken up the intro price,oh well.

captinjohn

RMH, I found a few guys wanting to learn the running of a SuperTiger 2300. I gave them your handle. Take Care & Merry Christmas. Capt,n

skip1320

http://www.amr-rc.com/index.php?path...=347&langue=en ,Any ideas fellas? has round ex port like DA or MT but straight plug,I need a cheap 80 now and not buyin an MT,guess well see. http://www.sdshobby.net/dj80-80cc-gas-engine_p2010.html

w8ye

My Feedback: (16)

Buy one and tell us about it?

jedijody

My Feedback: (1)

It's an MT80 with a black anodized case, they've got to change something to disguise it toget people to buy it.

Tired Old Man

My Feedback: (1)

Remember what I said about shiney or anodized a long time ago? It works every time............

jedijody

My Feedback: (1)

LOL,

tomyrcmodels

seem's some one borrow my design without my knowledge hope they can do good job and make good engine ,

ggraham500

My Feedback: (4)

Look who's calling the kettle black.

a1pcfixer

My Feedback: (7)

Early in 2011; [link=http://www.rcuniverse.com/forum/fb.asp?m=10207437]new 9cc, 17cc, and 35cc.....[/link]

Tired Old Man

My Feedback: (1)

Dick,

Everything that is hitting the market right now is pretty much along the line of what has already been. The most that is being done, at least among the more proliferate engine manufacturers, is nothing more than shaving some weight from a case and polishing or anodizing to provide a little more flash for marketing purposes. Some are getting smaller and cheaper but those are still nothing more than a fairly standard, ultra budget, gas 2 stroke. Only the high end manufacturers are doing anything that could truly be called experimental or developmental. Wait for 6 months after their release for the eastern manufacturers to make a poor copy of the better products.

The mini gassers are a source of puzzlement for me. How people can get excited over a 15cc to 20cc gas 2 stroke is beyond me. The glow engines they are intended to replace provide almost twice the power at 1/2 to 2/3 the weight of the similar sized gas engine. But neophytes will line up to buy them just the same.

All the truly new developments in gas two strokes is to be found in the UAV market. There are a tremendous number of new designs using vastly improved induction, cylinder head, and crankshaft designs. I've met with a few of those manufacturers over the course of the last year and those products are truly amazing, offering better cooling and fuel economyh less vibration, at equal or greater power levels. Don't look for any of that design work to make it to the RC market for at least another 5 to 10 years, if at all. Using Chinese methods, they can not be made cheap enough, with the required level of accuracy, using high levels of electronics and advanced programming, to function properly. They are expensive!

rmh

Yes -and as long as the energy in gasoline vs alcohol or diesel is a mystery to the vast (or half vast) group of buyers - the market will offer stuff that is very poor in power to weight
Way back when - The motorcycle guys really got some wild power from two strokes and four strokes -in very small packages -displacement wise .
In my own stuff - I have found that electric powered flying models now beat just about any glow powered setup in terms of power to weight and overall ease of use.
The best setup in tiny gas -I have yet seen- is the MVVS 26 on a good carbon tuned pipe and running in the 9000- 11000 rpm range- 14-15 pounds static thrust yet plenty of speed .
docile and a very usable power band.
But as tuned two strokes are simply "too much" for the typical small gasser enthusiast - This setup will never be popular.

Tired Old Man

My Feedback: (1)

Best power comes from the best engines, and the best piped power comes from the best pipes. All that requires an expense much higher than most in this forum are willing to invest. Plus there's the time and effort factors that seem to be quite limiting for many.

a1pcfixer

My Feedback: (7)

Jody has gotten 14 lb 9 oz from the new DLE20cc without any special tuned pipe.
Another user got 15 lb. from his.

Those mini gassers are primarily aimed at users wanting to get away from the expensive and slimy glows.
When something like the DLE20cc closely matches weight with an equivilant glow, yet costs far less, and has less
slime output, and has equal power, then it's game over....the mini gas wins!

YMMV

coronabob

My Feedback: (10)

My MVVS 1.60 ran great for a gallon or so on MVVS pipe before the crank pin wore itself down. After factory warranty repair, it ran great for another gallon or two and the bearings ceased. It has been sitting in the junk bin ever since. Too busy flying my DLE 20's, 30, 50's.

mpascual

My Feedback: (1)

New comming gas engines , 8 cc, 17cc, 25cc, 35cc ..... will change our perspective.
I've read a lot of bad thinks about the JBA15G, .90 gas engine when i started the thread of this engine some months ago. Now, there are many happy owners of this little gasser.
DLE has two awesome little gassers: the DLE20 and the DLE30, and give us a new option on gas to fit on airplanes designed for a .90-1.20 glow range.
I remember when some people set the limit for a gas engine in the 50cc range. They where wrong ..... or not ?
IMO : maybe in the next months we must lower the limit to 8cc ( .50 cu. in.)

Regards

rmh

amazing

a1pcfixer

My Feedback: (7)

Some of us are aware of a 9cc coming, but who's releasing an 8cc?