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Extreme Flight Extra 300, 78" WS

Old 01-15-2012, 09:11 AM
  #176  
TimBle
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Default RE: Extreme Flight Extra 300, 78

I am super impressed with my M33.

Just hoping my servo's arrive soon so I can get this Edge airborn
Old 01-15-2012, 06:08 PM
  #177  
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: TimBle

I am super impressed with my M33.

Just hoping my servo's arrive soon so I can get this Edge airborn
I don't have the 33. I have the 38 and it is very doggy. I am unimpressed with it's power output.
Old 01-15-2012, 06:56 PM
  #178  
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Default RE: Extreme Flight Extra 300, 78

I've got the OS GT33 engine, ES30G CF pipe and a home made Hyde clone isolator mount (similar to MTK's) in mine. Mine is somewhat heavy at 13#. Awsome power. Tons of vertical. I'm now using the Biela 19-10 prop. I couldn't be happier. The OS tends to want to start backwards until you get the technique down. The engine has gobs of compression. The Mintor 38 did not want to swing this prop.
Old 01-15-2012, 10:26 PM
  #179  
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: MTK


ORIGINAL: TimBle

I am super impressed with my M33.
Just hoping my servo's arrive soon so I can get this Edge airborn
I don't have the 33. I have the 38 and it is very doggy. I am unimpressed with it's power output.

good to know, port timing issues perhaps?

Old 01-16-2012, 06:30 AM
  #180  
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Default RE: Extreme Flight Extra 300, 78

ORIGINAL: swk550

I've got the OS GT33 engine, ES30G CF pipe and a home made Hyde clone isolator mount (similar to MTK's) in mine. Mine is somewhat heavy at 13#. Awsome power. Tons of vertical. I'm now using the Biela 19-10 prop. I couldn't be happier. The OS tends to want to start backwards until you get the technique down. The engine has gobs of compression. The Mintor 38 did not want to swing this prop.
I got a dynatron starter for the OS33GT. I've had a lot of trouble getting the engine to fire at all let alone start when hand flipping.

Well, guess what? The dynatron doesn't have enough guts to spool the 33GT up. Spool it up, hell, it doesn't even turn it over, on fully charged 6S lipo, 25 Volts. But it turns the Mintor 38 with no problem. The OS has tremendous compression as Steve points out, quite likely high compression ratio, to be able to put out the power it does. In addition the Bore to Stroke ratio is far more advantageous compared to other 30cc engines and the Mintor 38. OS did many things right on the engine but did not make it user friendly, at least not yet, early in the learning curve....

Edited Jan 18:
Tried again to start the engine with the dynatron except this time I choked the engine and drew fuel into the carb first. Not with the starter, it wouldn't turn when dry. Just several flips (10)

Then with ignition on, choke still on, full throttle, I flipped until I heard one pop
Then choke off, throttle back to idle and ignition on and with prop backed off to BDC, I bumped the starter. It immediatel started....HOOOORRAYYYYY!
That's my new starting procedure on this engine. Now I hope to get some serious break in data
Old 01-17-2012, 09:18 AM
  #181  
MTK
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: TimBle


good to know, port timing issues perhaps?

I think there are porting issues and compression issues. The 2:1 bore to stroke ratio really doesn't help at all either. Mintor may need to re-think their 38cc design from the ground up. It's just an OK sport engine but that's it. I really didn't want to buy one and figure out stuff on it, but no one else was doing anything on it and I need answers. So I developed them myself

If they were to use the cylinder/piston of their 33 and a new bottom end with around a 32mm stroke, with proper porting and around a 10:1 compression ratio, nothing in this size would touch it.
Old 11-28-2012, 05:26 PM
  #182  
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Default RE: Extreme Flight Extra 300, 78

see post below.

Dave
Old 11-28-2012, 05:31 PM
  #183  
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: swk550

Some more pictures
Hey guys sorry to drag up this old pic but what size spinner is in this picture?

thx
Dave
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Old 11-28-2012, 05:56 PM
  #184  
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Default RE: Extreme Flight Extra 300, 78

Matt, what ever became of the motor? I know you say you like it, was something 'wrong' or is the motor just not user friendly?
Old 11-28-2012, 09:39 PM
  #185  
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Default RE: Extreme Flight Extra 300, 78

Dave

I used a 3" aluminum. But I think it could easily take a 3 1/4"
Old 11-28-2012, 09:41 PM
  #186  
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Default RE: Extreme Flight Extra 300, 78

Joe,

Which motor are you referring to?

I discussed the SAP180HP, ZDZ40F3A, DLE55 and Mintor 38
Old 11-29-2012, 05:17 AM
  #187  
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: DLEVETT


ORIGINAL: swk550

Some more pictures
Hey guys sorry to drag up this old pic but what size spinner is in this picture?

thx
Dave
That was a 3.5" spinner in that picture.
Old 11-30-2012, 01:09 AM
  #188  
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Default RE: Extreme Flight Extra 300, 78

Hi guys,

I love pattern but at the same I like flying around with various aerobatic planes. I had the opportunity to fly the EF Extra 78'' with OS GT 33 that's an excellent combo. It is the electric version modified to gas. I find the opportunity to send a brief video of mine in order to get the feeling of the combo:

[link]http://www.youtube.com/watch?v=qvGW95XnJMc[/link]
Old 12-10-2012, 04:52 PM
  #189  
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Default RE: Extreme Flight Extra 300, 78

Thanks swk550.
I think I,ll try a 3-1/4" Truturn black anodized to start with.

Dave
Old 12-18-2012, 04:48 PM
  #190  
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Default RE: Extreme Flight Extra 300, 78

Well, I pulled the trigger and purchased the EF Extra 78" late last week.
Its now sitting at my shipping/receiving company waiting to be picked up. Unfortunetly I can't get there until Sat.
Its going to be a long week waiting to get it.

Dave
Old 12-22-2012, 04:47 PM
  #191  
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Default RE: Extreme Flight Extra 300, 78

Well, I picked up my Extra 300 today. What a nice piece of work.
Now the question is DA 50, MTW Exhaust system with a 3 blade 20 x10 or an OS 33GT 19 x 8 with a Hatori exhaust system?
I,m leaning towards starting with the OS and then moving to the DA if power is an issue.
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Old 05-19-2013, 08:32 AM
  #192  
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Default RE: Extreme Flight Extra 300, 78

i have just purchased this plane from EF and am looking forward to it.
i will be installing a saito fg 36 cc gasoline engine, 4 stroke. it will turn an 18 x 8 prop at 8000 rpm.
The engine, muffler, ignition, and mount weigh total 60 ounces. is this too much? will this make plane nose heavy, do i need to install rudder servo in tail??
i will also be using a tech aero IBEC.
i will also install a fiji tank 500 ml.
now, i need your help.
which servos are you all using?
how many servos do i need?? (1 rudder, 2 elevator, 2 aileron, 1 throttle)?
what in/ou servos for rudder/aileron/elevator minimal?
are you guys using standard receiver, or are you guys using a power safe vs smartfly vs power box?
are you guys installing the rudder servo in tail for push/pull?
think those are all the questions i have for now.
Old 06-16-2013, 09:48 PM
  #193  
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Default RE: Extreme Flight Extra 300, 78

I have been thinking about this airplane for #2 in my hanger, for 10S pattern/IMAC setup. The videos I see all make the airplane look pretty light on the wing - kind of floaty. Is that the case or am I seeing things? I thought the same thing about the Sebart Wind 110, ordered it anyway, and never really liked it.
Old 07-09-2013, 05:40 PM
  #194  
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Default RE: Extreme Flight Extra 300, 78

I never did finish my Extra 300 with the O.S.33GT in it and have decided that I'm going to go electric.
I recently got back into Helis and made a sizeable investment in batteries/chargers etc. I was thinking of going with a DA50 Escomposite pipe like Matt,s setup(awesome)but in the end decided that it made more sense to just commit one way.
Still looking forward to flying this baby even though its oing to be heavy as its a gas version.

Dave
Old 07-10-2013, 06:29 AM
  #195  
MTK
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Default RE: Extreme Flight Extra 300, 78

Dave,

There are no real disadvantages to the electric set-ups. Weight is a wash between a DLE55 powered andelectric powered model.An OS33 model would weigh about 1 pound less than either the electric of the DLE55.....

The biggest disadvantage of electric is flight time, if you use typical 10S, 5 amp batteries, compared to gasoline. The OS 33 model will fly 20+ minutes on 16 ozs. The DLE55 model will fly 20+ minutes on 24 ozs. The 10S, 5amp batteries will fly it for 7-8 minutes. You can always increase battery capacity and voltage similar to top end electric helis but remember anything more than 3750watts (5HP) is overkill.

Such was the case with the DLE55, 6HP+ (piped), which is 4500+ watts. Thrust was in the mid 30 lbs for a 13 lb airplane. BUTthe main take away should be that there was plenty of strength there to handle the power. The OS GT33 with its 4 1/2 HP output is a much better match.

There is also a new 40cc twin I am taking a close look at primarily for reduction in vibes. This whole enginewould fit inside the cowl.Engine weight is a scant 35 ozs, but with headers and pipes, it will be around 45-47 ounces. Should turn a 21-10 on pipes. Supposedly develops 4 3/4 HP on mufflesr so it will develop over 5HP on pipes



Old 07-14-2013, 12:03 PM
  #196  
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Default RE: Extreme Flight Extra 300, 78

Thanks for the reply Matt.
Which 40cc twin do you have your eye on? It sounds interesting.
As it works out the O.S. 33GT/Hatori combo is proving difficult to sell.
I may just end up putting it in the plane and waiting on the electric setup for a second electric version of the EF Extra.

Dave
Old 07-14-2013, 05:34 PM
  #197  
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Default RE: Extreme Flight Extra 300, 78

It will be interesting to see how the inevitable GT44 fits into this mix. Maybe it will be a 45 or 46 but I bet they already have
a prototype running. The hole between 33 and 60 is just too big to leave empty.
Old 07-14-2013, 05:48 PM
  #198  
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Default RE: Extreme Flight Extra 300, 78

An OS GT 44 twin with good headers from hatori would be great. It should be light enough for anything we do in pattern, considerably lighter than the DLE55 I'm playing with. I think the 55 needs a new home. I have ideas in mind for new, larger, all wood airframe with retracts for it....I will change my Delta to an OS GT33 set-up and shave 12 ounces at least

The twin I'm going to be playing with is the Valley View RC 40 twin. A good looking engine, very tight with excellent compression. I haven't started it yet tho so nothing more to discuss at this time.
Old 07-14-2013, 06:08 PM
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: MTK

An OS GT 44 twin........
My cystal ball only sees a single cylinder.
Old 07-14-2013, 06:23 PM
  #200  
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Default RE: Extreme Flight Extra 300, 78


ORIGINAL: MTK

......I have ideas in mind for new, larger, all wood airframe with retracts for it.......
Years ago, pre-electric pattern, something like this was done called the Petrol Petrel. F3A legal with a ZDZ 40. If I remember right, vibration was a problem. I only saw it fly a few times. You may have a good handle on that. The ZDZ can't match the power of today's Chinese engines, even of smaller displacement, so a modern 40 something may work OK.

The lack of vibration is the biggest attraction of electric for me.


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