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« on: August 20, 2018, 09:32:52 PM »
K K Iyer
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Hi everyone,
Since hardly anyone posts build logs (like shantanu borate, but he does only railway, or sanjayrai55, who has posted over 25, but none lately...), I thought I’d share one.

On RCGroups, there is a Build Off going on for pre 1970 designs, whose plans are available on Outerzone, but for which no pic is available.

These RCG Build Offs have no prizes, just kudos from peers worldwide.
Responses to posts make one feel a part of an international brotherhood!

I found a 1945 design called Iambus 2 by K.J.Miller
https://outerzone.co.uk/plan_details.asp?ID=4441

So I started building one...
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« Reply #1 on: August 20, 2018, 10:06:21 PM »
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Sir, i looked at the plan, it would be great fun to build this with wood preferably Balsa ! But need a mask to protect from the fine wood dust . Maybe i shall try with thermocole, he he .
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« Reply #2 on: August 20, 2018, 10:39:59 PM »
K K Iyer
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The parts...

D7C9E03F-DA07-49AF-88C1-B544E098E23D.jpg
Re: Build log - Iambus 2
* D7C9E03F-DA07-49AF-88C1-B544E098E23D.jpg (51.12 KB, 800x347 - viewed 160 times.)
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« Reply #3 on: August 20, 2018, 10:45:18 PM »
K K Iyer
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Assembled...

E10716A2-F4A2-48DD-B069-22DF6C3C5B86.jpg
Re: Build log - Iambus 2
* E10716A2-F4A2-48DD-B069-22DF6C3C5B86.jpg (63.28 KB, 800x600 - viewed 156 times.)
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« Reply #4 on: August 20, 2018, 10:57:49 PM »
K K Iyer
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I wanted a mirror finish, so I put on 4 coats of dope mixed with talcum powder.
Got a smooth (but not mirror) finish.

The weight went up from 5gms to 7-7.5gms.

So she flew FAST.
And was extremely sensitive to the angle of the elevons.

Then a Guru on RCG said ‘forget about the finish, keep it light, make a thinner fuselage’

I thought that the elevons might be stalling (upside down!) due to the abrupt angle.

So I build a second one much lighter, with a gentle curve for the elevons, by rubbing some Quickfix on the upper side and some water on the lower, and rubber banding to a suitable plastic bottle.



B61064E6-655C-4AA2-A816-C69B096BE433.jpg
Re: Build log - Iambus 2
* B61064E6-655C-4AA2-A816-C69B096BE433.jpg (83.06 KB, 800x600 - viewed 150 times.)
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« Reply #5 on: August 20, 2018, 11:16:42 PM »
K K Iyer
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The second one was only 3.5 gms!

BDA56DB5-5FDA-4733-B51C-840D450F0242.jpg
Re: Build log - Iambus 2
* BDA56DB5-5FDA-4733-B51C-840D450F0242.jpg (72.42 KB, 800x588 - viewed 153 times.)
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« Reply #6 on: August 20, 2018, 11:57:36 PM »
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awesome, and how did she fly ?
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« Reply #7 on: August 21, 2018, 05:36:00 AM »
sanjayrai55
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Really really good! Waiting for the video
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« Reply #8 on: August 21, 2018, 10:50:53 AM »
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@KK iyer

Sir,  the elevons, if we look visually, seems to be up at high angle.  Can trailing edge of elevons be trimmed little bit by sanding as that will reduce the elevon area facing airflow to compensate for higher angle and get a better glide?
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« Reply #9 on: August 21, 2018, 11:51:48 AM »
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Trailing edge curve retained to preserve original shape.
In the second model the elevons have much less reflex.

318C0F4D-E874-4716-9C25-CE30EB7A5642.jpg
Re: Build log - Iambus 2
* 318C0F4D-E874-4716-9C25-CE30EB7A5642.jpg (65.9 KB, 800x600 - viewed 116 times.)
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« Reply #10 on: March 05, 2019, 12:22:38 AM »
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That is a very nice build.
+ing on the Sanjay Sir's reply, "a video would be treat"
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