[NSRCA-discussion] Impressive pattern plane

vicenterc at comcast.net vicenterc at comcast.net
Thu Oct 12 13:39:02 AKDT 2006


Thanks Roberto,

Here is the information for ZDZ old version:
Engine with ignition: 52.4 oz
Ignition Battery: 3.5 oz
Total ZDZ 40 old version:  55.90 oz

Therefore, the net savings using the F3A version is 5.5 oz that helps some.

The OS 160 and the YS 160 are around 33 oz.  Therefore, the net different between gas and glow engines is around 22.9 oz = 1.43 lbs for the old ZDZ version.  For the new version would be 17.4 oz = 1.09 lbs.  Now, we will need to consider the differences between the headers, pipes and props.  I have the information for the OS 160.  The KM header, carbon pipe and APC 3 blade prop is 10.6 oz for the OS 160.  For the ZDZ 40 the total is 13.8 oz.  That adds another 3.2 oz. In conclusion, it appears that the additional penalty for using the ZDZ-40 F3A is a little over 20 oz or 1.28 lbs.  Base on my experience putting together the Abbra gas version and the glow version the information is correct.  I am assuming that the soft mount are equal in weight but I think the gas soft mount is 2 oz heavier.

Definitively, the Abbra would be a little below the 11 lbs using the ZDZ 40 F3A.  However, we will need to maintain the plane very clean.

Ciao,

Vicente "Vince" Bortone

-------------- Original message -------------- 
From: "Bob" <lomcevak at tin.it> 

I weighted the engine and at the moment I remember the bare engine weight is 1100 gr / 38.2 oz. and the total with switch and batteries is around 1450gr / 50.4 oz.
I have not tested it yet.

Roberto Bracchi - Italy
----- Original Message ----- 
From: Ed Skorepa 
To: NSRCA Mailing List 
Sent: Wednesday, October 11, 2006 5:20 PM
Subject: Re: [NSRCA-discussion] Impressive pattern plane


"up lines were a little lazy compared with the OS 160"

Vicente, you've got to be kidding! My old version zdz40RE swings 22x8 skorepa prop at 7200 on 10.88 lb Alien. Can you imagine what king of power is it? The airplane accelerates on up lines like a racket! 
----- Original Message ----- 
From: vicenterc at comcast.net 
To: NSRCA Mailing List ; NSRCA Mailing List 
Sent: Wednesday, October 11, 2006 6:36 AM
Subject: Re: [NSRCA-discussion] Impressive pattern plane


I have the chance to fly the Abbra gas version.  Also, I flew the glow version using OS 160.  Unfurtunetely, I did a trim fly only and not a complete Master schedule using the gas version.  The engine was not completely broke in.  I do remember that up lines were a little lazy compared with the OS 160 (I think more work needs to be done to select the proper prop).  The breaking on downlines were really nice.  If the ZDZ 40 F3A is 6-8 oz littler than the old version I will predict the ZDZ 40 F3A is going to be popular power plant in pattern.  Also will open pattern for the pilots that don't like glow or electric.

Important.  The plane was first built with no soft mount.  I really didn't like the vibration levels.  As consequence, the one aileron fluttered really bad.  The plane was saved.  We replaced the engine mount with custom built soft mount by Mr. Merle Hyde.  It was incredible experience to see the vibration reduction and the noise reduction with the hyde mount.  Conclusion, if you are planing to use the ZDZ 40 F3A do NOT hard mount the engine.

Vicente "Vince" Bortone

   

-------------- Original message -------------- 
From: mike mueller <mups1953 at yahoo.com> 
 That is really great info Lance. I'm hoping somebody we know does one so I can see how it runs. Mike

Lance Van Nostrand <patterndude at comcast.net> wrote: 
I'm sure a lot of you know about the soon to be released ZDZ40 F3A, which will be lighter than their 40 rear exhaust.  I am not an expert and know little,but I've fielded several detailed requests to determine if the large engine will fit inside the large chin cowl of the AeroSlave Symphony.  At about 5" wide where the engine head goes, it appears to be enough for a 2.2" head, even on a soft mount.  With the finished weight of glow and electric Symphonys hovering near 10#, the extra engine weight minus the smaller fuel load seems like it could finish out about 10.5#.  

Please don't take this information the wrong way.  I'm a modeler, competitor like anyone else and I like cool things and this would be cool.

--Lance

----- Original Message ----- 
From: mike mueller 
To: nsrca-discussion at lists.nsrca.org 
Sent: Tuesday, October 10, 2006 7:27 AM
Subject: [NSRCA-discussion] Impressive pattern plane


 Hey take a look at this plane from eastern Europe..
http://www.rcuniverse.com/forum/m_1157858/anchors_4849105/mpage_15/key_/anchor/tm.htm#4849105
 It has a gas ZDZ 40 and the final weight is less than 4800 grams. That's pretty impressive in my opinion. The prop is a 20" Engle which would give it an electric like performance.
 Also the best part of the plane is it doesn't have stickers all over it.
 Mike


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