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RE: EDF Airliner build thread - 3/21/2006 3:09:09 PM   
mkranitz



Posts: 1034
Joined: 4/18/2002
From: Lone Tree, CO, USA
Status: offline 		I like the cowls, Ian. So I take it that the entire stab assembly moves to provide pitch?

mk

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       Post #: 51

RE: EDF Airliner build thread - 3/21/2006 3:22:53 PM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		Michael

absolutely and with respect to another who has split the stabiliser to include elevators, I would not have it any other way. Pitch control is important and an all moving stabiliser provides smooth control. The other aspect is keeping it simple with a lesser of parts.

All the EDFmodel range use all moving stabilisers for this very reason.

Ian.


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       Post #: 52

RE: EDF Airliner build thread - 4/6/2006 6:02:51 AM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		Hello All

a bit quiet lately working behind the scenes on a few interesting things. Some of you are doing the same from what you have mentioned to me. As soon as we are all ready, it will make interesting viewing.

As an update on engine specs for the 301, some tests have been completed. In summary - The Mega 16/7/4 motor will work for the 301 on 1 3S battery. Technically it is not as good as the Hacker B20, but I like the option because of the lower cost, the Alfa aluminum adapter (3.2 mm) does not have to be machined and one battery is required.

More work on Frontier shortly.

Brushless motors -Mega 16/7/4 or Hacker B20-15L.

Which motor?

The Hacker motor is the superior performing motor. However it comes at a higher price than the Mega motor and requires 2x2S batteries. Alternatively the Mega at a lower cost, on one 3S battery will provide good performance.

Mega motor (option #1)

Two Mega 16/7/4 brushless motors on a 3S setup, in the 301 cowling, produces around 410g of thrust at 13.8 Amps at 143 watts per motor. (Order the 3.2 mm Alfa fan aluminum adaptor for the Mega motor).

Batteries -Mega option

Either

3S Poly-Quest PQ-3300XP 20-30C - 3300mAh,
3S Hyperion HP-LVX3300 20-30C - 3300mAh

Hacker motor (option #2)

Two Hacker B20-15L, Kv 3700 motors on a 2x2S setup, in the 301 cowling, produces around 510g of thrust, 13.5 Amps at 185 watts per motor. (Order the 2.0 mm Alfa fan aluminum adaptor for the Hacker motor).

Batteries -Hacker option - two 2s Lithium Polymer Poly-Quest 2100-3300mAh batteries wired in series. Using 3300 mAh battery packs will produce a flight time of around 15 minutes (with the model flown slow and scale like). However, this also produces a heavier model required to fly faster. 2100 mAh packs will provide a lighter model with flight times of around 10 minutes. 2500 mAh packs sits mid range.

Poly-Quest batteries

2 x 2S Poly-Quest PQ-2100XP 20-30C Packs- 2100mAh
2 x 2S Poly-Quest PQ-3300XP 20-30C Packs - 3300mAh


Hyperion batteries -slightly higher discharge rates

2 x 2S HP-LVX2100 20-30C Packs - 2100mAh
2 x 2S HP-LVX3300 20-30C Packs - 3300mAh

Ian.


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       Post #: 53

RE: EDF Airliner build thread - 4/7/2006 2:46:19 AM   
serdark


 

Posts: 40
Joined: 4/5/2004
From: plano, TX, USA
Status: offline 		Hello All,

The construction of my 301 is a little behind schedule since I was busy with my engineering job (putting food on the table and paying for this hobby). Hiowever, I have completed the conceptual design and constructed the parts I would need to for the assembly.

IMPORTANT NOTE:
THE ORIGINAL 301 KIT DOES NOT REQUIRE ANY CHANGES. I AM SIMPLY EXPERIMENTING WITH A FEW IDEAS AND I WILL CONSIDER MYSELF LUCKY IF THE MODEL STILL FLIES AFTER ALL THE THINGS I HAVE CHANGED SO FAR.

Back to the subject: The modified 301 kit will have fowler flaps (two split flaps on each side, and I have managed to do so by adding no more than 5 oz to the overall weight. Another change is the modified winglet design. I have also added 50 sqin to the overall wing area compensating for all the additions, maintaining the original wing loading.

Well, stay tuned to see it before April is out.

Serdar

(in reply to EDFmodel)
       Post #: 54

RE: EDF Airliner build thread - 4/7/2006 3:36:10 AM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		Serdar

Sounds incredibly amazing. I am definitely looking forward to this.

To make matters even more interesting, another is doing something equally impressive and independent (of which I can not speak), but it will appear.

All round, this is going to be fun.

Busy this end with a few tricks up my own sleeve too.

Ian.



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       Post #: 55

RE: EDF Airliner build thread - 4/7/2006 4:51:14 AM   
Eddie P



Posts: 678
Joined: 2/4/2003
From: Reno, NV, USA
Status: offline 		Nice work guys!

(in reply to EDFmodel)
       Post #: 56

RE: EDF Airliner build thread - 4/9/2006 7:38:40 AM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		More progress on the 301 Frontier Airliner.

Some may not have seen our models before or understand EDFmodel’s building philosophy. The two photos perhaps give one insight.

Once the major subassemblies for the fuselage are complete they are then all assembled to produce the complete fuselage. No glues are used in bringing the sub assemblies together.

If a model suffers damage at the airfield there can be nothing more frustrating than cutting and re-gluing bits and pieces. A repair should not take so much time and effort that it destroys the modeller’s enthusiasm. My view is models should quickly come apart for inspection and part maintenance. Additionally, upon impact much energy can be dissipated before any serious damage is done because parts can ‘give’ a little. Nylon screws pop out for example.

The challenge is to actually fly the model and keep it flying.

My dislike of balsa comes about because of the need to start “butt-gluing” wood together forming rigid structures and ‘foamy’ type models tend to suffer that gradual hanger damage just putting them in the car. Another silly example is gluing landing gear legs to styrene wings in the hope they stay there on a rough landing.

I believe more energy in the model workshop should be directed toward developing better assembly technologies for the construction of electric models. One answer is designs that are modular which offer improved model impact resistance with ease of maintenance. Your model costs halve with every bad accident because generally you can repair the model.

I appreciate my views are not for everyone and so please no one take any offense.

Ian.


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< Message edited by EDFmodel -- 4/9/2006 8:20:29 AM >

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RE: EDF Airliner build thread - 4/10/2006 1:14:15 AM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		More pictures




Ian

< Message edited by EDFmodel -- 4/10/2006 1:17:15 AM >

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       Post #: 58

RE: EDF Airliner build thread - 4/10/2006 3:15:15 PM   
serdark


 

Posts: 40
Joined: 4/5/2004
From: plano, TX, USA
Status: offline 		Ian,

I agree with you 100%, especially the design is so clean and easy to assemble yet eye pleasing. I wish you had a larger model that could carry a wireless camera for aerial video broadcast.

Serdar

< Message edited by serdark -- 4/12/2006 1:21:43 AM >

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       Post #: 59

RE: EDF Airliner build thread - 4/10/2006 3:16:39 PM   
serdark


 

Posts: 40
Joined: 4/5/2004
From: plano, TX, USA
Status: offline 		Orville! it will not fly!!

You have forgotten to add a wing to this aircraft!

Serdar

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       Post #: 60

RE: EDF Airliner build thread - 4/10/2006 3:23:23 PM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		Cheers

There is some very exciting designs on my table. This year just might see your wish come true.

How is every one else getting on with there 3O1's

Ian.

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       Post #: 61

RE: EDF Airliner build thread - 4/10/2006 4:28:16 PM   
mkranitz



Posts: 1034
Joined: 4/18/2002
From: Lone Tree, CO, USA
Status: offline 		Ian,

This bird is outstanding!! I'm extremely excited to get my hands on it. When I responded to your email, I was replying to the previous photos and had not received my email notice of these recent ones.

1. The modularity is very intriguing. I like the concept. Butt joints are for butt heads.

2. Do you intend to test fly this before you ship it stateside?

MK

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       Post #: 62

RE: EDF Airliner build thread - 4/11/2006 12:32:36 PM   
EDFmodel



Posts: 112
Joined: 8/20/2004
From: Queensland, , AUSTRALIA
Status: offline 		One is standing at runways end. Model is set to go.

The heart begins racing at a million miles an hour. Will it fly? Have I thought of everything? Will my reactions be quick enough? What will the modellers watching think of my skills?

Michael, fly it and steal all this pleasure away from you.

Not a chance.

There is not a drug better that gets the heart ticking than the virgin flight.

Ian.

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       Post #: 63

RE: EDF Airliner build thread - 4/11/2006 4:31:58 PM   
mkranitz



Posts: 1034
Joined: 4/18/2002
From: Lone Tree, CO, USA
Status: offline