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Author Topic: Forerunner Mk II 4.5 plan ready  (Read 34278 times)

Offline SteveMoon

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Forerunner Mk II 4.5 plan ready
« on: March 12, 2012, 08:26:39 AM »
I've finished the plans for the Forerunner Mk II 4.5 and they
are now listed on our website: www.ultrahobbyproducts.com.
This is a .60 size version of Tom Farmer's famous Forerunner.
Has a wing span of 60.5 in., and wing area of 660 sq. in. This
is easily one of the all time best flying 60 sized profile planes
ever designed. I'll add some pics as soon as I get some.

Thanks, Steve


Offline Doug Knoyle

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Re: Forerunner Mk II 4.5 plan ready
« Reply #1 on: March 16, 2012, 09:51:39 AM »
Yes, pics please!  I'm in the middle of getting back into CL after 15+ years and have finely just started in on the Forerunner kit I purchase long ago.  I've not been able to find much on the Forerunner on the net.  No info from those that flew them, nor any pics.  I'm aware of adding to the tail moment and increasing flap size on the 40 size ship, but that's it.  I'll be interested to see what you've got in this new version.
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Offline Doug Knoyle

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Re: Forerunner Mk II 4.5 plan ready
« Reply #2 on: March 18, 2012, 10:41:51 PM »
Ty,
What did you power your ForeRunners with? I'm setting mine up for electric and would be very interested in what you experienced.  I have heard one comment that running a 46 on it would not be too much, so am very curious since you mention your intention on running a 46 on the bigger MkII.

[edit: Oh! just realized I mis-understood - the MkII is still a 40-46 size ship and the MkII 4.5 is the bigger one]

Also, did you run any aerodynamic mods to your original ForeRunners? How much did they weigh?

Thanks,
Doug
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Offline SteveMoon

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Re: Forerunner Mk II 4.5 plan ready
« Reply #3 on: March 21, 2012, 07:59:21 AM »
Doug: I have built and flown several Forerunners over the years. I wouldn't
change anything about it as far as tail moment, nose moment, flap size,
etc are concerned. Which kit do you have? Custom models or John Lowery.
I've built both and didn't change anything on them. Both planes were good
fliers.

Steve

Offline Doug Knoyle

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Re: Forerunner Mk II 4.5 plan ready
« Reply #4 on: March 21, 2012, 11:57:15 PM »
Steve,
To late. Reacting to both comments from others (old email from 1996) and a study of modern formulas from successful ships, the tail moment has been increased approximately an inch, H-stab/elevator re-positioned and redesigned with airfoil and slightly increased area, and some personal touches of re-shaped vertical and tips.  The wing is now 552 sq and weight is on course to be around 45 oz.

One thing I should point out is that this is the "original" kit from Custom Models, not a Mk II.

I'll post some pics in the "Gettin all AMP'ed up!" section, but need to figure out the exact power-train combo first.

What size internal combustion engine did you run on your Forerunners?

Doug
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Offline SteveMoon

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Re: Forerunner Mk II 4.5 plan ready
« Reply #5 on: March 22, 2012, 03:31:30 PM »
Doug: We've run OS 40 FPs, OS 46LA, and SuperTiger 46.

Steve

Offline Steven Kientz

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Re: Forerunner Mk II 4.5 plan ready
« Reply #6 on: June 21, 2012, 02:52:12 PM »
Does the Forerunner MK II 4.5 use a foam wing?

Steve
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Offline Doug Knoyle

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Re: Forerunner Mk II 4.5 plan ready
« Reply #7 on: June 22, 2012, 01:16:36 AM »
It's time for pics! 
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Offline SteveMoon

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Re: Forerunner Mk II 4.5 plan ready
« Reply #8 on: June 22, 2012, 08:01:44 AM »
Yes it is. Unfortunately, Tom Farmer the designer and builder has been ill lately and
has not been able to make it out to the field so I can get some shots of his plane.
I'll get them up as soon as possible.

Thanks, Steve

Offline SteveMoon

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Re: Forerunner Mk II 4.5 plan ready
« Reply #9 on: July 13, 2012, 07:53:02 PM »
Ok, I've finally got some pics to post of the Forerunner Mk II 4.5.
Thanks to David Russum for supplying these.

Steve

Online Allan Perret

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Re: Forerunner Mk II 4.5 plan ready
« Reply #10 on: January 22, 2015, 07:26:35 AM »
Does this design have any wing assymetery ? 
Was wondering if that would be something to look at changing in you were going to mount the engine on outside of fuse. 
Are there any advantages to mounting engine on inside ?    What I don't like is the muffler on the top..
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