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Old 07-29-2009, 09:15 PM   #1
Trumpetman
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Default ZDZ 100R2 - real world experience anyone??

I'm looking for anybody who has some real experience with this inline twin cylinder 100 cc gas engine to give me their input. It is sold by R.C. Showcase in the States. I am not familiar with ZDZ or the service provided by this company. I'm looking for a power plant for a big Bud Nosen
P-51 Mustang and I think that this would really fit the bill in terms of size. Don't worry, I'm going to be strengthening the airframe to handle the much larger engine than the geared .60 it was apparently designed for!!
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Old 07-30-2009, 01:41 AM   #2
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Default Re: ZDZ 100R2 - real world experience anyone??

Here is a link to the engine that I am asking about:

http://www.rcshowcase.com/html/ZDZ/zdz100r2.html

does anybody out there have one of these things??
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Old 07-30-2009, 07:31 AM   #3
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Default Re: ZDZ 100R2 - real world experience anyone??

I cannot comment on that particular engine, but I can attest to their customer service. I'm speaking of the parent company, not the reseller as it seemed in my dealings that the parent company has final decision on warranty claims. I had a 80 RV-J that knocked a hole in the bottom of the crankcase, which was caused by a mfg problem. Needless to say I had a new engine on my doorstep in less than a week. I couldn't complain one bit. As soon as they saw the pictures of the damages, they said no problem, it will be replaced immediately.

As for that particular reseller, I don't believe he is in business anymore. If you looking to buy in the states, Troy Built Models is now reselling their line. I've ordered from them a few times now and they seem like a stand up company. Never a problem with any of my orders.

http://www.troybuiltmodels.com/items...R2-INLINE.html


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Old 07-30-2009, 09:44 AM   #4
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Default Re: ZDZ 100R2 - real world experience anyone??

Thanks for the update on te US re-seller. TBM is a great company and I'm sure will continue to support the product.

I'm still looking though to hear from anyone who has actualy run/flown one of these engines...
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Old 07-31-2009, 05:15 PM   #5
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Default Re: ZDZ 100R2 - real world experience anyone??

OK Lets change the question. Has anybody out there ever even seen one of these engines?? What about the new 3W 110cc inline twin??
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Old 07-31-2009, 06:18 PM   #6
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Default Re: ZDZ 100R2 - real world experience anyone??

Well how 'bout a word of mouth report?

I've not run one of the inline twins but know someone who has and the number one issue with them is cooling. And to your specific install question; Warbirds are notoriously difficult to cool if cowled in a scale manor.

IMHO, you're gonna need a pretty sophisticated baffling system to give it even half a chance of living....
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Old 07-31-2009, 10:36 PM   #7
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Default Re: ZDZ 100R2 - real world experience anyone??

Very Interesting! [with german accent]

Actually I had not thought about the cooling issues of having one cylinder in front of the other but it definately makes sense that some good ducting would be required to keep the back jug happy! This is the kind of input I was looking for to help me make a decision. Lets keep it coming

Thanks Zeeb
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Old 08-01-2009, 12:46 AM   #8
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Default Re: ZDZ 100R2 - real world experience anyone??

Gordon,

I had the Super-80 and it is a great engine. I can't speak to the 100 in-line directly... but ZDZ generally makes good engines. The 100R2 looks less refined than the others, especially the carb setup.

Cooling will be your issue as will space, throttle linkage and maybe vibration. I'm not sure how big your BN Mustang will be but I am building a Meister ME109 (formerly PCM.) Thats a 100" wingspan in the 35 to 40lb range.

I will be using a DA85 which is rated for more power and is much lighter. The 85 has almost as much oomph as a DA100 and the teething issues seem to have been worked out.

There are some other big singles out there too. FPE has a monster size single I think. I think simple is better and the space in a P-51 is very limitedin the nose... I'm not sure how you would get the carbs inside the cowl (they are side-mounted).

You might be able to hide the 85 in the nose if its as big as the Comp-Arf P-51...

Hey - maybe we can chase each other around next year I hope to get my 109 done this winter. May not fly that well at Calgary's altitude though with just an 85 at 40lbs... now I know why you put in those huge engines!
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Old 08-01-2009, 09:41 AM   #9
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Default Re: ZDZ 100R2 - real world experience anyone??

Hi Chris,

Given the lack of response to this question I can only assume that there are not very many of these engines out there in service. I hate being the guinea pig and would rather go with the developed DA 85 or one of the big 3W singles.

My TF P-47 wll be finished before the Mustang though so I'll have to chase you with the Jug. Now that would look cool at an airshow!
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Old 08-01-2009, 10:26 AM   #10
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Default Re: ZDZ 100R2 - real world experience anyone??

Trumpet,

If I where to setup a Warbird and had the money, I would do all I could to get a twin in there with the reason being.....

Not all, but most of the people I see around here with big single powered warbirds spend as much time fixing vibration related problems as they do flying.

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Old 08-01-2009, 10:27 AM   #11
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Default Re: ZDZ 100R2 - real world experience anyone??

My jug will be done too. Mine is Yellow A/C done with Flite Metal ... but only a DA50 and probably 10lbs hevier that yours LOL. 3W 80 - WOW! That thing will haul the mail even in Calgary. Put a CH ignition on it though

I will also have a F-86 sabre jet in the Golden Hawks scheme just like Hawk one that we saw in Airdrie next year Year of the warbirds is coming!
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Old 08-01-2009, 10:28 AM   #12
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Default Re: ZDZ 100R2 - real world experience anyone??

The problem with Twins is that horizontally oposed ones don't fit in Warbird cowls. Radial is the way to go ... but huge $$$
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Old 08-01-2009, 10:31 AM   #13
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Default Re: ZDZ 100R2 - real world experience anyone??

Hi,

Inline twins.

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Old 08-01-2009, 10:46 AM   #14
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Default Re: ZDZ 100R2 - real world experience anyone??

Quote: Originally Posted by crhammond
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The problem with Twins is that horizontally oposed ones don't fit in Warbird cowls. Radial is the way to go ... but huge $$$
P-51 would look funny with a big radial up front LOL
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Old 08-01-2009, 10:48 AM   #15
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Default Re: ZDZ 100R2 - real world experience anyone??

I was looking at this motor.
http://www.troybuiltmodels.com/items...R2-INLINE.html
If you look at the heads, you can see that the top fins are turned 90 degrees. This is ideal in that with baffling, it allows the front and rear cylinders to be cooled optimally and equally.

Here is the 3W-110 inline.
http://www.aircraftinternational.com.../3w_110ir2.htm
Looking at the heads, there is no way to baffle it so the you can cool the front and rear equally and optimally.
Either to front cylinder will cool better, or both will be sub optimal.


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