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Old Feb 25, 2006, 04:49 AM
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Quote:
Originally Posted by HeyLuc
Hey guys,

What do you think of a dual midifan with retracts?

Size approximately:
Span 1060mm
Length 1435mm

Luc
I think that would be GREAT!!!! I know it would cost a fortune, but it WOULD be the Kit of a lifetime for me!!!

Tom - Milwaukee
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Old Feb 25, 2006, 05:07 AM
The need for speed
Perth Western Australia
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cant you just upscale the minifan one
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Old Feb 25, 2006, 05:18 AM
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Hey Brett,

The outlines I can scale, but I have to reposition the fans, the LiPo's, reinforce the fuselage and the wings, make supports for the retracts....

Lot to do, but of course I don't have to start from scratch.

Luc
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Old Feb 25, 2006, 07:59 AM
The need for speed
Perth Western Australia
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luc

what do you do for a living

cad related
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Old Feb 25, 2006, 08:03 AM
who dares wins
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Brett, im getting there... im going with your set-up. i did order two mega 16/20/2's but changed that to 16/15/3's, like you say 200g less lipo and 60g less motor, Your video was fantastic. i can't wait!!

Brett, i was thinking about retracts, using larrys units.. eg carls conversion of minifan Het F20
http://www.rcgroups.com/forums/showp...&postcount=346 but im going to use a bungee

Hi Luc, twin midifan is a great idea! im really enjoying the build, your construction is so well thought out, its a very nice kit!

Alex
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Old Feb 26, 2006, 04:05 PM
who dares wins
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Luc, been thinking about the twin midifan idea...

would be nice to do as scale as possible,
also oliver at wemotec has a new retract system available very soon
'It is compatible in size to the Spring Air 602, but swiss quality.
It will be published here next week. Not just retracts, but an entire system.
Single mechanic is less than 30 grams, its good for 4.5 kg models. with optional electronic valve and pneumatic brake'
http://www.rcgroups.com/forums/showthread.php?t=487352

some pics for scale


Alex
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Old Feb 26, 2006, 04:07 PM
who dares wins
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two more
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Old Mar 02, 2006, 11:27 PM
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F-22 dual midifan:

I've been watching pictures of the F-22 during last week. The retracts go in the sides of the fuselage, which means they rotate over an angle of at least 160 degrees. I didn't find retracts like this on the market. The best I can do is make sure that the wheels are in scale position when open. In extracted position they will be somewhere in the bottom of the fuselage.

Regarding retracts, I will go for the new Robarts, the 510 serie. I have send a PM to Wemotec to question his retracts, but didn't get a reply, so I don't know what his retracts will look like.

That's it for now,

Luc
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Old Mar 14, 2006, 01:16 AM
The need for speed
Perth Western Australia
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Hey Alex and Bob

Hows the progress of your F22 ..

Im about to start a scratch built one thats slightly bigger with retracts..
Using the same power plant

Ive bought the retracts and have got hyperions new 3.7gr sevos to do the doors with..

Ive put some decals on mine ill post the file so you can have a look

Cheers
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Old Mar 14, 2006, 05:00 AM
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Hi Brett

I've sprayed the base colour and assembled the cockpit and canopy and glued in the fins (I left them off while the covering filling and sanding were done). I've made up some masks for the top camouflage and will airbrush today.

Bob
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Old Mar 14, 2006, 08:32 PM
The need for speed
Perth Western Australia
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Lets see some in progress pics bob

What power system are you going to use??

When do you think it will maiden??
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Old Mar 19, 2006, 12:24 PM
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Hi Brett

I've sprayed the base colours and most of the panels, dielectric panels, formation lights etc and added some of the panel lines. Next is the decals and exhaust flaps. Still quite a bit to do.

I've settled on Mega 16/15/4s with one 5s Tp Prolite 6000. I chose this combination to give me around 8 minutes duration. The videos of yours and Rob's F-22s indicates that I should have more than adequate performance in this comparatively small, low drag airframe. I need the duration to fill the display slots I shall be flying this year at shows and fly-ins.

The model should be finished within a week. However, the very cold, easterly, windy weather seems set for some time to come.

Bob
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Old Mar 19, 2006, 12:45 PM
who dares wins
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Bob, Very Sharp!!

as for me, im just about to start covering...

Alex

Bob, are your elevons all moving?
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Old Mar 19, 2006, 01:23 PM
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Alex

The tailerons are split with a fixed tailplane as on the plans.

Bob
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Old Mar 19, 2006, 01:25 PM
who dares wins
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thats how ive done it also, just couldn't see your cut or control rods.

in placing my control rods on top. not as asthetically pleasing but will be abit more durable perhaps
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Old Mar 19, 2006, 06:54 PM
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Alex

I'd prefer them underneath, but looking at the high alpha landings in the videos I couldn't see how bottom mounted horns could survive for long. So on top they have to be.

Bob
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Old Mar 19, 2006, 07:57 PM
EDF Jet Jam 2015 , May 28-31
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Man what a finish Bob P. Great job.
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Old Mar 19, 2006, 08:09 PM
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That is probably the best lookin' F-22 around!

Awsome work my friend.
Randy
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Old Mar 19, 2006, 11:40 PM
The need for speed
Perth Western Australia
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Well done Bob she looks fantastic.

What will your all up weight be??

your going to love how she handles so smooth. and the things it can do at a very low speed shocks people. As far as wind goes dont worry ive been out when others wouldnt dare it just doesnt seem to affect it.
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Old Mar 20, 2006, 12:02 AM
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Sweet video good tunes awesome flying plane Brett. I want to borrow your camera man great job of staying on the plane. Are you running both mega 3 on one 4s pack? Thanks Dave
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Old Mar 20, 2006, 01:15 AM
The need for speed
Perth Western Australia
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Hi Unclecrash

Im running 2 x mega 16/15/3s on hyperion vx 3700 4s im safely getting 6 minutes with all up power of around 800watts and it can hover with that
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Old Apr 09, 2006, 08:08 AM
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Zoom, zoom. First flight at last

Yahoo, at last, at last

After waiting a couple of long weeks since the F-22A was completed at last a 'suitable' day for test flying. The very cold windy northerlies, which had turned to very wet and windy westerlies had now decreased to moderate westerlies. I was prepared the day before but the winds were at least 24 mph. So when the new day dawned with better promise I arranged to meet with Terry (Pontious) my flying buddy and John Emms who supplied the kit, fans, ESCs and motors.

The model complete weighs 75 ounces with the TP Pro Lite 6000 5s pack. I had chosen this battery with Mega 16/15/4s to give 8 minutes plus flights, with current and discharge within my 70% rule for LiPos. The current was about 40 Amps for 340 watts after about 60 seconds.

On arrival at the field the wind had risen to about 15 mph. But, heck we had waited long enough. So on with the photos and range check, which proved excellent. The wind was about 20 degrees off the strip but I was able to lay the bungee dead into wind and set up the trusty Bob's sleigh ramp.

I did a last check, set full up trim for the first flight, made sure John and Terry were ready with the cameras, took a deep breath, opened the throttle and flicked the launch release. The model accelerated strongly off the ramp and climbed gently with little roll. I knew I had a winner. . The model climbed more steeply before bungee release. As it flew free and was barely rolling I trimmed out the up trim I had added before launch. I then rolled left and turned downwind, feeling the model in roll and pitch. What a fantastic smooth, solid feel!

I flew in circuits for the cameras, slowing down even more as I got used to the model. Allthough I did a couple of high throttle zooms to feel the power. The wind barely affected the model and there was no wing rock, just the odd gust. When the alarm sounded for one minute to go, I set up down wind and slowed the model. I turned base leg and slowed more and turned finals into the brisk wind. The model tracked smoothly and I throttled right back. As the speed decreased and I increased alpha the model settled into a nice nose high approach and I throttled to control the descent. Over the edge of the patch I cut the throttle and gently lowered the model onto the ground. The model slowed and stopped in a straight line.

Wow. Fantastic. What a super model, a pussy cat to fly with plenty of power, and a fantastic speed range. Well done Luc and Rob. I had only needed a couple of ticks of up trim and none in roll. The control throws felt just right. I had used the recommended +- 30 mm aileron but had set +-14 mm elevator, because I knew from previous RBC kits that Rob uses much more elevator throw than I do.

I had only taken 1943 mAh out of the pack in 6 1/2 minutes, but I had been using barely 1/3 throttle for most of the flight for the cameras.

I flew a second flight for more pics and was able to explore the high speed end a bit as well. I was able to slow the model even more on finals and approach at higher alpha under complete control. Now on to exploring the envelope and just enjoying this fine model

Bob
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Old Apr 09, 2006, 08:39 AM
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Congratulations Bob!!!! Reading your report made it seem like I was right there with you!!! she looks wonderfull. Many Happy flights!!

Tom - Milwaukee
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Old Apr 09, 2006, 09:10 AM
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Link for short clips of Bobs F-22 Maiden. Takeoff Flybys & Landing.
Was it cold ,the things I put myself through in the quest of aviation.

www.putfile.com/pontious

Terry
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Old Apr 09, 2006, 02:16 PM
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Hello Bob,

Looks great man, congratulations!

Luc
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Old Apr 09, 2006, 02:53 PM
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Luc

Thank you. But to you must go the plaudits for designing and developing such a fantastic jet.

Bob
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Old Apr 09, 2006, 09:26 PM
The need for speed
Perth Western Australia
Joined Apr 2005
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Congratulations Bob

It gave me goose bumps reading your story. I can relate to everything you said.

Youve built a fine aircraft and im sure youll be the envy of many at the shows you go to.. Enjoy

Ps Now its Alex s turn to join the club.
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Old Apr 29, 2006, 08:47 AM
who dares wins
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ok guys,

my F22 is 99% finished, i just have to program my new esc, im waiting for one of these http://www.kontronik.com/Grafik2006/Progcard800.jpg because at the moment its cut off is 2.7v and brake is 0.5s, the card will let me easily chose what i want for each setting, the one esc will control both motors (thanks pontious for that tip). Also the rear hatch, i have attached it with nib magnets the same as the canopy, but as i learnt during this my first kit build i should have let the balsa dry 100% before gluing.. so the hatches back edges need a firmer hold, ill use 2 x bolts/screws from the rear.

maiden as soon as esc prog card, 1 week. Cant wait, at last!!

Here's some pics:
original intention was 'tiger meet' style, i stopped half way through, so no tiger stripes. I wanted a scheme where i could easily make out orientation

Alex
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Old Apr 29, 2006, 08:54 AM
who dares wins
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Here's two more pic's, the bottom, ill probably do panel lines all over the jet, but maiden first

the build went really well, the kit is very nice and complete

Alex
oh, and the bungee hook, of course, just got to slit the covering open and place it in the slot as designed into the kit.
ps, rear hatch isn't attached in pics, its just placed losely
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Old Apr 29, 2006, 08:06 PM
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Alex

Great stuff. You should just make it to Bickley.

Bob
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Old Apr 29, 2006, 08:14 PM
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Alex

Just noticed that you have 'joggles' in your pushrods. On high speed models this can lead to 'blowback' of the control surfaces. This causes lack of control effectiveness and vague feel. Better to have short straight linkages.

Bob
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Old May 15, 2006, 03:29 PM
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Just got my kit, anyone know if the kits wood diagram in the bottom right corner of the plan is to scale? ( If i was to break part of mine, could i enlarge the print in a scanner up to the right size)

Or should i trace around the wood parts onto paper now, just in case i break it later?
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Old May 16, 2006, 10:55 AM
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Second question, more directed to Bob.
were you using a reciever battery, or a bec enabled controller. If the latter, which controller was it that could BEC on 5 cell lipos?
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Old May 22, 2006, 12:36 AM
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Alex i have a question i just started to build my f-22 and instead i was wondering why i couldnt make the taileron as a full piece instead of part of it? Has anyone thought of doing that or not??
Scotty
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Old May 22, 2006, 03:42 AM
The need for speed
Perth Western Australia
Joined Apr 2005
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Hey Guys ..Sorry for the lack of responce they must be out flying..

Birdseed - The wood diagram is 1/3 scale ive scanned this as individual components then you can scale it up with a print function. Im currently doing this to make a new F22 that is 20% larger with retracts.

Birdseed - I use a seperate rx battery for saftey but ive also bought a UBEC whitch can do up to 6s .. The BEC has to be a switchmode type to handle the high voltage most BECs within speed controllers are linier types and can only hande 3s

Smooth6x6 - The designer Luc made the original with an all moving tailplane but he found they fowled the ground and may get ripped off on a full deflection.. Split puts less load on the servos and is alot stronger..

Hope this helps
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Old May 25, 2006, 12:54 PM
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Birdseed

Just got back from hols. I use a 5 volt SBEC for flight control power. The leads are soldered to the 4 mm connectors in the fuselage for the battery and fits directly behind it. The Rx is alongside the right fan unit in the space at the side and the opto JETI ESCs are directly behind their motors in the ducts. No hint of glitching, but I do have a ferrite ring in the SBEC lead to the Rx

Bob
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Old May 25, 2006, 05:33 PM
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Here's my F-22, I built two of them to take to SEFF, one for myself and one for Randy @ Dynamolectrics.com.

Mega 16/20/2
CC45 ESC
4S3P TP2100 Prolites

http://www.wattflyer.com/forums/showthread.php?t=5716

http://media.putfile.com/F22-Raptors

1KW and close to 4lbs static thrust 4.6lbs AUW

If I went to 4S4P I could get another 200 watts but I'm happy for now
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Old May 25, 2006, 08:25 PM
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Thanks Bob,
where did you buy the SBEC from, and what make was it.

Oh, i got 2mega 16/15/4 at sandown, two mini fans, 60A controllers from rcmdirect and a jr synth reciever. All i need are a couple of servos.

what are you guys using? I have a couple of hs225mg and some of the 5125 digis which were earmarked for another project but could be used if the 225s arent enough.
Ive also got one hs81mg which i could get another off.
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Old May 25, 2006, 08:44 PM
Watts the Point
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KY,USA
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HS56MG for me
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Old May 25, 2006, 10:22 PM
The need for speed
Perth Western Australia
Joined Apr 2005
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HS125MG for me
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Old May 26, 2006, 01:10 AM
Average Joe 2 Semi-Pro n Back!
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- Net, so how does the Raptor fly in comparison to your EAM F-15? What is the weight, and power setup compared between the two?

I am getting finished up with my F-15, which will end up at about 1600 watts total power, but it has retracts to carry around
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Old May 26, 2006, 01:14 AM
Watts the Point
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The Raptor is about a pound lighter, the F-15 is pushin 1400 watts. Raptor seems alot easier to fly than the Eagle and comes in alot slower on landings. I'm wanting to take them both out and fly them in the same day for better comparison but I haven't figured out how to get both in my vehicle at the same time

P.S. Hopefully my buddy Stry-Ker will have some vid for me tomorrow of the F-22 when we went flying last weekend, I'll post here also.
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Old May 26, 2006, 04:27 AM
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Birdseed

I got the SBECS from John at Puffin, together with the ferrite ring. I use two HS 81 MGs.

Bob
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Old May 26, 2006, 09:35 AM
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Hello All,

Iím extremely happy when I see the success of the F-22 dual MiniFan and the fun you have with it.

As discussed before, I started working on the F-22 with dual MidiFan and retracts, but still a lot of work to do.

The design is on 1/12 scale with main dimensions:
Span: 1130mm
Length: 1530mm

Keep you posted on the progress.

Luc
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Old May 26, 2006, 10:03 AM
Watts the Point
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Sweet!
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Old May 28, 2006, 03:30 AM
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wich edf fans?

Hey luc,

What model of fan do you use for the 1/12 f22?

Y will building him for 2 90mm


greetz
wim
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Old Jun 01, 2006, 10:22 PM
Watts the Point
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Here's aome video of my F-22, this is the second flight from a couple weeks ago. (2) Mega 16/20/2, 4S3P TP2100PL CC45 ESC 1000watts

http://media.putfile.com/F22-Raptor-flight-3
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Old Jun 01, 2006, 11:21 PM
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The twin Midi will be a "must have"

Randy
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Old Jun 02, 2006, 02:07 AM
The need for speed
Perth Western Australia
Joined Apr 2005
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Not wanting to put a downer on it...

I personally think that 2 midifans would be overkill and would only appeal to a limited market.

Having 2 minifans and the complexities of that already puts people off..

I do beleive that a F22 twin minifan with retracts would be nice..

But im bias coz thats what im up to right now..
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Old Jun 02, 2006, 11:44 AM
Watts the Point
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Thats the kind of power I like OVERKILL !
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