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Posted by Herb | Nov 04, 2017 @ 12:46 PM | 2,786 Views
Acquired this new nice small Hawk as a replacement for my 70mm FW F-104 missile ... The 104 flies very nicely but in the silver scheme is a bit hard to see on the landing approach when it comes toward you.

With the idea of moving my power setup from the F-104 tom the Hawk, I got just the $169 airframe ("Arf-Plus") kit :

https://www.motionrc.com/products/fr...awk-t1-red-arp

It is a pity they don't make a similar, no frills & lightweight one, in a bigger size ~90mm

I love the way Hawks fly, this is my ninth edf one from what I can count (the first one was a Gloeckner kit with a Schwerdfeger 69mm fan) ... Too bad the larger FW offerings are either airliners (A-10) or that overcomplex F-14.

It turns out this Hawk also runs rings around my overbelled and overwhistled FW 90mm F-16 even though the latter has a very powerful JetFan / HET 700 combo in it .

Edit: Short video added:

BAe Hawk Red Arrows edf by Freewing Maiden (4 min 17 sec)


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Posted by Herb | Oct 20, 2017 @ 02:17 PM | 3,369 Views
I've used gyros for years in my EDF jets ... They can be useful for takeoff and landing, and occasionally in flight when there's a lot of wind.

https://www.banggood.com/Hobby-Eagle...-p-991417.html

https://www.banggood.com/Hobbyeagle-...l?rmmds=search

https://www.amazon.com/HOBBYEAGLE-Co.../dp/B0123C57LE

http://www.hobbyeagle.com/gyros/a3super2.php?lang=en

This particular gyro has a number of fancy features, but I only use the most basic ones (KISS principle)

The many options can be confusing, but I use the "NORMAL" mode exclusively, and most of the factory DEFAULT settings. For ex. I never used the "Auto-Balance" , the "3D-AVCS" or the "Auto-Hover" features. I also use the standard (default) setup for servos eg. 50Hz.

As a result, there's hardly anything to program !

All the EDF jets below are flying with the same exact Hobby Eagle A-3S II gyro, pretty much set up the same way in every one:

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Posted by Herb | Sep 16, 2017 @ 01:15 PM | 5,924 Views
Got this one as an "Arf Plus" kit from MRC for $249 - including shipping to Cali :

https://www.motionrc.com/products/fr...mm-edf-jet-arp

Will install my own 80mm inrunner motor fan with a yep 150A esc,

https://www.rcgroups.com/forums/show...EDF-fan&pp=100

Was not going to use the outrunner fw fan that comes with the pnp kit, although the performance should be rather similar, at least to the comparable FW inrunner version.

The original Douglas A-4 Skyhawk had a wingspan of 8.38m and an overall length of 12.22m :

https://en.wikipedia.org/wiki/Douglas_A-4_Skyhawk

whereas the model has a wingspan of 940mm and a length of 1430mm, which gives as an overall scale for the model of ~ 1: 8.91 (from the wingspan numbers).

The paint scheme on mine represents an A-4P of the Argentinian air force around ~ 1982 so it's usualy referred to as the "Falklands" ("Malvinas") scheme.

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Video added Oct 22:


A-4 Skyhawk 80mm EDF by Freewing with FMS inrunner fan (3 min 38 sec)


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A-4 Skyhawk 80mm edf Takes Off in a Stiff Crosswind (3 min 37 sec)
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Posted by Herb | May 16, 2017 @ 12:47 PM | 8,729 Views
Got this one from HK for $215, airframe only - but with complete metal landing gear, some servos (gear door) and a simple gear door sequencer.

Had no use for the junk fans, junk outrunner motors and escs that the pnp version comes with for an extra $150

The original Sukhoi Su-35 has a wingspan of ~ 15.3 meters and a length of ~ 21.9 meters,

https://en.wikipedia.org/wiki/Sukhoi_Su-35

whereas the model has a wingspan of 108 cm and a length of 163 cm, which gives as an approximate scale ~ 13.8 : 1 .

Some but not all Su-35's have thrust vectoring ... the Su-37 variant does as well.

Will be repainted in a different camo scheme, similar to the one shown below.

Power will be from twin WeMoTec MiniFan EVO 70mm or a comparable 10-bl setup, with either a HET 2w, Arc or Mad Thrust, or similar , quality in runner motor on 6S.

A proven setup very similar to what I have in my Sukhoi Su-47 Berkut :

https://www.rcgroups.com/forums/show...0mm-EDF&pp=100

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Posted by Herb | Apr 12, 2017 @ 05:03 PM | 10,256 Views
I picked up one of these as an "airframe only" from MRC for $159 :

https://www.motionrc.com/products/fr...mm-edf-jet-arp

They also sell it (the airframe only but with LG) for $104 in China :

https://www.aliexpress.com/item/RC-a...782118518.html

It seems slightly larger than my JePe F-16 (35" ws vs 31" ws) :

https://www.rcgroups.com/forums/show...by-Jepe&pp=100

so a rough comparison will be interesting.

On this one the wingspan is 88 cm and the length is 131 cm, whereas the real one has a 9.96m wingspan at a 15.06m length

https://en.wikipedia.org/wiki/Genera...ighting_Falcon

so the model is in the ~ 1:11.4 scale range.

I plan to possibly have a tailerons only setup, to reduce wing drag.

Fan will be an 70mm one with quality inrunner, and a 150A YEP esc I already have.

Finish will be in a simple 1984 Belgian TigerMeet scheme, which I have done a few times before ...

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Edit: Video added Oct 22

F-16 70mm EDF by Freewing with WeMoTec EVO fan (3 min 17 sec)


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Takes off and lands like a feather :

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F-16 FW 70mm edf takeoffs and landings (1 min 14 sec)
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Posted by Herb | Mar 03, 2017 @ 01:21 PM | 10,691 Views
I just got this new FMS 80mm plastic fan from China,

http://www.banggood.com/FMS-80mm-12-...p-1125125.html

For $76 it includes (what looks like) a nice inrunner motor, and that was the main reason for buying it. Many of these chinese fans nowadays include some $10 junk outrunner motor that I really don't care about

I am not familiar with that particular motor brand ("Predator") ... we shall see

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Posted by Herb | Jan 28, 2017 @ 02:36 PM | 13,338 Views
I got this one as an "airframe only" kit for $129

http://www.bananahobby.com/8-ch-blit...f-jet-kit.html

http://www.f-hobby.com/sky-flight-su...or-thrust-p-13

http://www.generalhobby.com/su47-ber...ion-p-816.html

The manufacturer is listed as "Sky Flight Hobby", and occasionally as LX or Lan Xiang.

The kit version is fine for me, as I really don't need all the extra junk motors, junk fans and junk escs

Will strip out all that thrust vectoring stuff, plastic nozzles, plastic mounts etc as well, and as a result lighten it up as much as possible.

Power setup will the twin WeMoTec Mininfans EVO 70mm on 6S.

Here's a video of how mine flies :

Sukhoi Su-47 Berkut (3 min 21 sec)


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The original Su-47 Berkut does all sorts of wild aerobatics, which in the model requires a very LIGHT airframe and lots of power

Su-47 Berkut - Extreme Maneuverability (5 min 50 sec)
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Posted by Herb | Jan 06, 2017 @ 10:17 PM | 9,588 Views
I got the F-16C from MRC a couple of weeks ago, very simple and straightforward to put it together...

She's a bit smaller than my Tam F-16 (which is 12-th scale) and a bit larger than my old all molded JePe F-16.

On this one the wingspan is 102.3 cm and the length is 152.2 cm, whereas the real one has a 9.96m wingspan at a 15.06m length

https://en.wikipedia.org/wiki/Genera...ighting_Falcon

so the model is in the ~ 1:10.2 scale range.

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Posted by Herb | Dec 21, 2016 @ 07:02 PM | 11,309 Views
I got this from MRC as an airframe kit only for $159,

https://www.motionrc.com/products/fr...f-jet-arf-plus

http://www.rc-castle.com/index.php?r...rch=F-104+70mm

http://www.rc-castle.com/index.php?r...rch=F-104+70mm

http://www.hobby-paradise.com/en/en/...e.html?sort=4d

It includes pretty much everything except fan and esc (and of course receiver). I really had no need for another $20 outrunner edf plastic fan .

It seems pretty well made for what it costs, the overall near-scale outline and the paint job look pretty good.

More importantly the ducting is actually pretty decent compared to some other FW offerings !

For some reason all the ones I have seen in person crashed badly, nevertheless the F-104 is generally a decent EDF (or turbine) flier.

The original F-104 had an overall length of 16.66m and a wingspan of 6.36m,

https://en.wikipedia.org/wiki/Lockhe...04_Starfighter

whereas the model has 1.403m and 0.656m respectively, giving a scale of 11.88 (length) to 9.70 (wingspan), or on the average ~10.8 scale.

Here's a video of how mine flies (it gets faster as the batteries warm up) :

F-104 Starfighter 70mm EDF with WeMoTec MiniFan EVO (1 min 32 sec)


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Posted by Herb | Oct 29, 2016 @ 09:19 PM | 10,327 Views
Started to look at the various pieces as the came out of the FlyFly box, it seems all the underwing tanks are missing.

Other than that, the kit seems in reasonable shape. I got it from hobby88.com (which is basically flyfly),

http://www.hobby88.com/shop/index.ph...d1beeb4f8d431c

http://www.scaleflying.com/Hawker-Hu...an_p_2409.html

JePe's modifications are described in detail here :

www.jepejets.com/blog/?cat=10

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Posted by Herb | Oct 19, 2016 @ 01:11 PM | 12,385 Views
I got this kit some time ago from Dragon Hobby for $64 which is not bad, so I don't get all the extra junk I don't need.

https://www.dragonhobbyusa.com/edf-jets/90mm-edf.html

Setup is a JetFan 90mm with HET 650 motor on 6S (3S+3S) 4000's , this is the setup I took out of that POS Freewing Fiat G-91 with atrocious ducting that always felt overweight, underpowered and never flew half right

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Posted by Herb | Jan 10, 2016 @ 12:50 PM | 15,828 Views
Here's my latest fast foam project , a $99 FlyFly Mirage 90mm EDF

http://www.scaleflying.com/Mirage-20...ey_p_3404.html

http://www.generalhobby.com/flyfly-m...ion-p-879.html

http://www.hobby88.com/shop/index.ph...page=1&sort=6a

modified following (rather loosely) JePe's very detailed suggestions:

http://www.jepejets.com/jepesite/Fas...age/mirage.htm

http://www.jepejets.com/jepeshop/mir...am-mirage.html

The model has been around for a while so here's a few useful threads talking about it:

https://www.rcgroups.com/forums/show...1197638&pp=100

http://www.rc-network.de/forum/showt...BERICHT/page50

I got the kit about a month ago, and did the maiden yesterday

I like to do most of the finishing & detailing work after the maiden, for obvious reasons

Below is what she looks like after the maiden

And here is a short video of the Mirage, I had to edit some parts out as the camera was on auto-focus:

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Mirage 2000 by FlyFly 90mm EDF (2 min 14 sec)


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Posted by Herb | Sep 17, 2013 @ 08:07 PM | 29,076 Views
HTG MiG-15 (90mm EDF) 155cm (61") wingspan, a very nice kit! And quite close to scale

This thread in Italian or German

http://www.hobbytopgun.com/PC/Mig-15.htm

http://www.jepejets.com/jepeshop/116-mig-15-fastfoam

http://www.hobbyking.com/hobbyking/s...dProduct=24003 ($159 epo )

http://www.airshowrc.com/mig-15_hobby_top_gun.html

http://wild-technik.de/shop/product_...ucts_id=101561

The MiG-15 with shipping cost me less than a pair of BVM molded MiG-15 wing tanks

Given the 155cm wingspan of the model, the scale is approximately 1008cm / 155cm = 6.50 :

http://en.wikipedia.org/wiki/Mikoyan...urevich_MiG-15

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Flight video added Nov. 17 2013, flies pretty fast but lands slow :

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MiG-15 90mm HTG flyby (0 min 15 sec)

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MiG-15 bis 90mm HTG (1 min 53 sec)
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Posted by Herb | Sep 11, 2013 @ 01:30 PM | 32,770 Views
I got this kit for $119 from the HK usa warehouse, not bad fro the price

I started putting some of it together while I am waiting for some additional parts.

Power setup will be a WeMoTec EVO fan on 6S 4000's.

http://www.hobbyking.com/hobbyking/s...dProduct=24283

http://www.hobbyking.com/hobbyking/s...ch=MiG-15+1127

It is / was sold as the "Hobbyking", "Proedf", "ProDesign" or "KMP" (Kondor Model Products) MiG-15 90mm edf.

Wingspan is around 1127 mm, length around 1124mm, expected weight rtf around 3kg.


Edit: short flight video added Oct. 27 2013:

MiG-15 90mm composite EDF (HK/ProEdf/ProDesign) (1 min 53 sec)


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Posted by Herb | Jan 26, 2012 @ 12:47 PM | 127,631 Views
The long awaited CMP (aka CMPro or China Models) Aero L-39 / L-59 Albatros 90mm EDF

http://www.chinapro09.com/OEM%20airplan/L-39.html is now out.

This thread in German

This thread in Italian

Given that the original had a wingspan of 9.46m and a length of 12.13m (L-59: 12.20m), whereas the model has a wingspan of 120cm and a length of 132cm, the scale is approximately 9.46m/1.20m = 7.9 :1 .

L-39 : http://en.wikipedia.org/wiki/Aero_L-39_Albatros

http://www.airwar.ru/enc/other/l39c.html

http://www.airwar.ru/other/draw/l39c.html


More info on the kit :

http://www.nitroplanes.com/cmp-cp09-090-kit.html

http://www.scaleflying.com/Aero-L-39...an_p_2522.html

http://www.hobbyking.com/hobbyking/s...00mm_ARF_.html

http://www.x-flight.com.hk/?sp=&p=6&...&cat0=1&id=159

http://hobbyfly.de/en/rc-airplanes-1...00mm-6767.html

http://www.ready2fly.ch/shop/USER_AR...anzeigen_ab=0&

The retracts are exactly the same as the ones sold for the CMP / HK Hawk :

http://www.hobbyking.com/hobbyking/s...dProduct=19949

I got mine from RC Aerodyne and it arrived, double boxed with no damage.

Edit: CORRECT CMP L-39 CG AFTER THREE MONTHS OF FLYING:
ca. 75-78 mm from wing leading edge at root (see picture below)



Short Video of mine (April 2012) :

CMP L-39 (Hobbyking L-59) Albatros 1200mm EDF (5 min 52 sec)


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Posted by Herb | Dec 16, 2011 @ 06:15 PM | 79,621 Views
My new little project, a Messerschmitt Me-163 Komet, 61'' wingspan. It will be FAST

This thread in German

Some basic info on the Me-163 Komet rocket interceptor can be found here : http://en.wikipedia.org/wiki/Messerschmitt_Me_163

The original Me-163B had a wingspan of 9.33m, which makes the model roughly 1:6.1 scale.

Most likely the paint scheme will be "yellow 15" kept at Raf Cosford.

The model itself is the so-called "Flyboy Models" or "BH Models" 0.60-size Me-163, 1540 mm (61'') wingspan,

and is made by CY Model : http://www.cymodel.com

http://www.cymodel.com/Cn/pro_view.asp?id=26

http://www.jfchobby.com/en/html/Prod...106&SortID=192

http://www.texasrcplanes.com/me163.html

http://www.bphobbies.com/view.asp?id...0&pid=E3715233

http://www.topd.ch/RC-Modellbau/JFC/...-von-000481253

http://www.aeromodelismoserpa.com/me...tf-p-9840.html

http://www.hebu-shop.ch/product_info...6e75280af25d03

http://www.austars-model.com/dispdet...12061052272283


Edit : Me-163 short video March 2012:

Me-163 Komet 60-inch RC (FlyBoys) (2 min 5 sec)


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Posted by Herb | Oct 13, 2011 @ 06:29 PM | 46,301 Views
Once in a while an EDF fan comes along where there's plenty of measured data to evaluate how good it is ...

Here's some nice and complete systematic data for the new 90mm JetFan :

www.ejets.at

Of great relevance of the overall fan efficiency, defined as

efficiency = (mechanical work done per unit time) / (input power) , in e.g. (N.m/sec)/Watts

A good substitute for the above quantity is, based on simple formulas relating work to fan thrust and fan efflux:

efficiency = (const.) x thrust^(3/2) / (input power)

You would imagine that if somebody is really serious about designing an efficient fan they would take the time to actually do relative measurements of different designs, in order to figure out which rotor/stator design in the end is best.

Indeed that is how serious fan designers (eg WeMoTec, Daniel Schuebeler etc.) indeed do it ...

But then often a new design comes up (nowadays every other week, in some cases a copy of somebody else's rotor, with one blade added or subtracted so it don't look like a copy ) - without any clear measurements of anything.

If it is a clear shameless copy of a DS-51 fan, then it has to be as good as the DS-51, right ?

Then the relentless overhype follows ("20% more efficient than anybody elses fan'" - to the point that now the overall efficieny adds up to 110% ), and more adverts such as "best fan I ever tried in my xx" etc.

Now, the Jetfan 90 data is interesting and accurate enough to pull out :

1) the relative efficiencies of different motors in the JF

2) the very slow rise of efficiency with power/voltage

3) the large errors inherent in all these measurements

4) the wide spread in motor efficiencies (up to 31%).

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Posted by Herb | Oct 02, 2011 @ 01:29 PM | 36,203 Views
Last month I had a chance, while spending some extended time in Paris for work, to visit the Air and Space Museum in Le Bourget.

http://www.museeairespace.fr

The museum is located within a large airport in the Bourget suburb of Paris, and is the site the Paris Airshow (which takes place usually in June).

It has an amazing collection of - what else - French (mostly Dassault) jet aircraft, including some weird looking experimental aircraft, but also Montgolfieres, some very early 20-th century planes (Bleriot), some very nice WWII warbirds (including a FW-190A and a Spitfire Mk. IX) and two Concorde.

A Visit to Le Bourget Air and Space Museum (2011) (3 min 14 sec)


Rafale A:

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