Mailing List flyrotary@lancaironline.net Message #65191
From: Le Roux Breytenbach breytenbachleroux@gmail.com <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Evap cores
Date: Mon, 9 Sep 2019 10:37:44 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Got a price on these universal radiators they is 700 cube inch 

I did have RAD10 in stock. They retail at R2730 inc vat.
( thats more or less 185,57 USD) + shipping

Regards 
Christa Rogers 
Cell: 079 916 5579




 

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Le Roux Breytenbach breytenbachleroux@gmail.com <flyrotary@lancaironline.net>
Sent: Sunday, September 8, 2019 6:14 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Evap cores
 
These universal radiators from Mr Turbo are also nice as you can change the inlet/outlet sockets to suites your needs
Maybe from ZA a good import with USD
http://www.mrturbo.co.za/index.php?option=com_virtuemart&page=shop.product_details&flypage=flypage.tpl&product_id=811&Itemid=57

 

From: Rotary motors in aircraft <flyrotary@lancaironline.net> on behalf of Bobby J. Hughes bhughes@qnsi.net <flyrotary@lancaironline.net>
Sent: Sunday, September 8, 2019 5:20 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Evap cores
 
Finn,

Dave’s advice is spot on. Most of these companies will build what you need for only a little more money then retail. You tell them core / tank size, fitting size, air bleed, drain location, additional angle for defuser mounting, etc.. Build a mock-up out of cheap thin foam board, 5 minute epoxy and toothpicks to determine fit up. Thrift store foam works great for about $1.00 a sheet. Lightweight and sturdy. Make a sketch for the manufacture to build the heat exchanger.

500-600 cu in is a good range for a non-boosted two rotor. With a reasonable duct and defuser you can expect between 80F-110F air delta T. Some have had better results. This is where Ed’s workbook is very useful and helps set expectations for core and inlet size. If you have room I would start with a 25-30% duct opening and reduce if possible during flight testing. Once you have a performance baseline it’s much easier to reduce the opening then enlarge it. Or use a cowl flap.

Ed’s workbook estimates BTU rejection for the core face so I assume it’s for the first cubic inch. My 2.75” cores with an 82F delta T preform about 35% better than the workbook prediction.

Bobby

Sent from my iPad

> On Sep 8, 2019, at 12:59 AM, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
>
> I think the "Scirocco" style refers to no filler cap.
>
> There are a lot of "Scirocco" rads at fairly low prices, but they appear to be thin; nowhere near the 500 cu inch we're looking for. Also, most of the racing radiators have 1.25 to 1.75" inlets/outlets. I wonder how you found yours with 1.1" inlets/outlets. ( https://www.ebay.com/itm/290600743649?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 )
>
> But would like to know what Dennis uses.
>
> Finn
>
>>> On 9/6/2019 10:30 PM, Charlie England ceengland7@gmail.com wrote:
>>> On 9/6/2019 8:16 PM, Finn Lassen finn.lassen@verizon.net wrote:
>>> Not sure why I was so stuck on only putting evap cores in the cowl cheeks.
>>>
>>> Evap cores are cheaply available.
>>>
>>> I'm thinking they could easily be stacked under the engine as well. (Not making then 8" thick, but flat end to flat end, or tank-to-tank).
>>>
>>> One way would be to join them flat end to flat end with an o-ring. That would put them in series. 13" wide and 18" long.
>>>
>>> The other way would be tank against tank, which would enable parallel (but more hoses). 9" wide and 26" long.
>>>
>>> I don't remember earlier postings on this, but would 3/4" ID hoses be enough for a series configuration? (200 max HP Renesis, more likely 180 HP)
>>>
>>> Finn
>> Tank to tank makes an efficient diffuser difficult.
>>
>> There are cheaper versions of the Scirocco rad with 2" thick cores, if you think that would be enough core volume. Dennis H. is using a Scirocco for his Renesis; perhaps he'll see this thread & tell you his core thickness.
>>
>> Charlie
>>
>> Charlie
>>
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