Author Topic: Engine choice - Cabin Eagle  (Read 1722 times)

Offline MrG

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Re: Engine choice - Cabin Eagle
« Reply #15 on: May 10, 2017, 04:06:57 AM »
@Kiwi55

sorry have not answered back to an earlier question to much fun flying
MrG,
I appreciate the information, most helpful.
How does the VW perform at gross weight? Can you comfortably carry a full size passenger?
At 1050lb it does it hard 200/250 fpm climb, i don't have full size wings about 1 ft shorter over all, also from my home work with the vee
at the top of wing attach you loose a bit of lift to - if widened to like a half cab or cable eagle you would gain there too , we widened the
windscreen at the top to 10in wider,   5 each side and plane was lets say did not like it - lost a lot of lift - if i did another fuse would def be like
a cable eagle (more like the cub/kitfox ) really waiting to see what  rfeenstra is doing when he test flies - from home work ive done with a smart
mate, thats the way to go, could see 70 knt cruise


Also could I get the spec's of the propeller you are using?
Yes 72x24 i think or 68x24 but ask Frank would not change a thing, i beleive its the same as TomH too, it really works at 3180 to 3200rpm im indicating 65knts
i have seen 800 fpm cold day, one up 35 litres of fuel, i believe im running 80hp
MrG
Temora Airport  Australia
1st Aussie DE built / Flown
19-8866
-----------------------------
1 Oct 2015 First Flight
11 Oct 2017 - 89 hrs Flown

Offline Tom H

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Re: Engine choice - Cabin Eagle
« Reply #16 on: May 10, 2017, 05:59:36 AM »
DE Stubby has a Great Plains 2180 engine w/ Performance Propeller 62 x 26 prop. 

For performance, see the link I included in my earlier post in this thread.

My advice to anyone building a DE - keep the weight to a minimum.  This is intended to be a bare-bones airplane.  Adding extra "goodies" like we did just takes away payload carrying ability.  But, at the other extreme, I don't know if anyone has ever built a DE as light as the prototype is reported to be (or even comes close!).

Another thought on climb improvement:  We have a LEU (Treehugger) that is being restored.  I wanted to put in a center section, which would increase wingspan by about 20-24".  I think this would improve lift.  But, the decision is to leave the wing attach alone, keep wingspan the same (mainly because it will have the new Verner 3 cyl engine).  I wonder if the DE Cabin types have a longer wingspan and if it helps climb and/or load lifting ability?
Tom H
Stubby, a BDE
Treehugger, LEU

Online PropMan

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Re: Engine choice - Cabin Eagle
« Reply #17 on: May 10, 2017, 06:58:48 AM »
A Verner 5VW would be perfect on the DE or CE.

65 HP @ 2300 rpm
120 lbs ( installed weight should be 135 lbs with prop)
starter
electronic ignition
8200.00 plus shipping and import fees
Frank

Offline MrG

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Re: Engine choice - Cabin Eagle
« Reply #18 on: May 11, 2017, 03:32:43 PM »
Sorry i thought my prop was bigger i have same size prop as TomH,  (Frank nailed the prop - Awesome)

@Tom with what i have played with i truly recon you would 100% gain lift buy making it a cabin, as you get to much disturbed airflow under the wings
 in the foot either side of the wing attach, and proved it in flight testing, found a photo of new screen when fitting , the plane was flown with this screen 
in and removed after flight - just making the top wider by 4 in each side made the plane nearly unflyable - top speed was 50 knts - old screen 65 knts

Even the nose were the screen its on the standard DE wing (under instead of over) would be causing so much drag, if you put your hand up there in flight 
on one side it yaws the plane by covering about 4in square from attach point between wing and top of screen. 

As Tom said add weight it slows down - I fly the plane with my daughter @950lb with mate next door we at @1050 - The difference between me empty
and daughter and slightly noticeable, but add that extra to get up around 1050, its like a 150 cessna on a 110 deg day
MrG
Temora Airport  Australia
1st Aussie DE built / Flown
19-8866
-----------------------------
1 Oct 2015 First Flight
11 Oct 2017 - 89 hrs Flown

Offline ToddK

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Re: Engine choice - Cabin Eagle
« Reply #19 on: July 12, 2017, 07:21:58 AM »
Yamaha Genesis 4 with PSRU.  These are being used on Kolbs and Gyros.

Check out Mohawk Aero Craft.
There are some pretty good youtube videos. 



Offline MrG

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Re: Engine choice - Cabin Eagle
« Reply #20 on: July 27, 2017, 05:13:55 AM »
If you google that engine it really gets interesting
MrG
Temora Airport  Australia
1st Aussie DE built / Flown
19-8866
-----------------------------
1 Oct 2015 First Flight
11 Oct 2017 - 89 hrs Flown

Offline wojtekseta

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Re: Engine choice - Cabin Eagle
« Reply #21 on: September 11, 2017, 12:38:11 AM »
If you didn't made decision yet:
The best from mentioned earlier engines is Rotax, but if you don't have / dont't want to spend a lot of money, you should look at 100HP BMW boxer with TakeOff redrive http://www.takeoff-ul.de/ . From their site: BOXER-flat engine  R  1,2  GS 75  kW+  at 7200  1/min,  including  directly  programmable  electronic fuel injection, starter, three-phase current alternator, twin ignition, oil cooler - 58 kg. Ready to fly with exhaust, engine mount, fuel pump, propeller, etc should weight about 80 kg - 178 lbs.
They sold hundreds, maybe more of the powerplants.
The engine is powerfull, smooth working, silent, economic. Will lasts for thousends of flying hours. In the USA was sold a lot bikes with this family of engines - you will have no problems with service and spare parts.
Wojtek LE XL G-19

Offline scottiniowa

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Re: Engine choice - Cabin Eagle
« Reply #22 on: September 11, 2017, 04:32:44 AM »
If you didn't made decision yet:
The best from mentioned earlier engines is Rotax, but if you don't have / dont't want to spend a lot of money, you should look at 100HP BMW boxer with TakeOff redrive http://www.takeoff-ul.de/
any chance you have a link to a english version, or is there a simple tab for english?
http://groups.yahoo.com/group/IronDesign/
best address    irondesignairparts@gmail.com

Offline wojtekseta

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Re: Engine choice - Cabin Eagle
« Reply #23 on: September 11, 2017, 05:36:37 AM »
Only few words and description of the options in English. You should look at tab "Produkte".
I have some old meterials in English, I can put them to download section.
Wojtek LE XL G-19