Archive/Old Mag/Spud Restoration Part 2

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" rowspan="2" width=156 BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="00e9cc00egerdp.jpg"> <div> <B> <STYLE>  </STYLE>  </B></div> <bR> <bR> <bR> <bR> <bR> <div> <B> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="1" WIDTH="97" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 313 ><NOBR><div> <A HREF="index.htm" TARGET="_top" TITLE="Home Page"><U><B>Home</B></U></A></div> <div> <A HREF="id2.htm" TARGET="_top" TITLE="Archive"><U><B>Archive</B></U></A></div> <div> <A HREF="id5.php" TARGET="_top" TITLE="Contact"><U><B>Contact</B></U></A></div> <div> <A HREF="id6.htm" TARGET="_top" TITLE="Downloads"><U><B>Downloads</B></U></A></div> <div> <A HREF="id7.htm" TARGET="_top" TITLE="Events"><U><B>Events</B></U></A></div> <div> <A HREF="id8.htm" TARGET="_top" TITLE="For Sale"><U><B>For Sale</B></U></A></div> <div> <A HREF="id9.htm" TARGET="_top" TITLE="Galleries"><U><B>Galleries</B></U></A></div> <div> <A HREF="id14.htm" TARGET="_top" TITLE="Games"><U><B>Games</B></U></A></div> <div> <A HREF="id15.htm" TARGET="_top" TITLE="Links"><U><B>Links</B></U></A></div> <div> <A HREF="id16.htm" TARGET="_top" TITLE="Magazine"><U><B>Magazine</B></U></A></div> <div> <A HREF="id17.htm" TARGET="_top" TITLE="Newsletter"><U><B>Newsletter</B></U></A></div> <div> <A HREF="id18.htm" TARGET="_top" TITLE="Reference"><U><B>Reference</B></U></A></div> <div> <A HREF="id88.htm" TARGET="_top" TITLE="Video"><U><B>Video</B></U></A></div> <div> <A HREF="id19.htm" TARGET="_top" TITLE="Weather"><U><B>Weather</B></U></A></div> </NOBR></tD> </tR> </TABLE></B></div> <bR> </td> <td valign="top" colspan=2 height=100 BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="00f00640egerdp.jpg"> <bR> <bR> <bR> <div> <I><B>Archive </B></I></div> <div> </div> </td> </tr><tr> <td valign="top" height=380 colspan=2 BGCOLOR="#FFFFFF" TEXT="#080000"> <div> <FONT SIZE="2" COLOR="#000000" FACE="Arial" > <STYLE>  </STYLE>  </FONT><A HREF="id56.htm" TARGET="_top" TITLE="Archive/Old Mag/Spud Restoration Part 12"><U><B><< </B></U></A><B>  </B><A HREF="id57.htm" TARGET="_top" TITLE="Archive/Old Mag/The Great Mull Air Myste"><U><B> >></B></U></A></div> <div> <TABLE BORDER="0" CELLPADDING="25" CELLSPACING="1" WIDTH="602" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 1192 WIDTH="550"><div> <I><B>SPUD, Installment Two</B></I></div> <bR> <div> This is a follow on article about the restoration of SPUD, an own design model which I loved until it became oil soaked and tatty.  In the last installment  the model was completely restored and readied for flight using the original O.S. 26 four stroke which had been fitted with new crank bearings and was in perfect order except for a worn camshaft.</div> <bR> <div> Well, the first flights were terrific! The motor ran perfectly as always and I was really chuffed to have my old mate back. To begin with I was very pleased with the way the whole thing had turned out. But, after a couple of sessions  I began to wish I had just a bit more power, just like the last time I was flying him. (Yep! He's most definitely a him. Don't ask me why, he just is!) </div> <bR> <div> I thought I'd have to try a new cam and see how that went but, thinking about it, I figured even if it made two or three hundred rpm more it still wouldn't be enough because I was having to flog the motor at full chat all the time that I was doing aerobatics. Anyhow, I kinda resigned myself to a new cam which would give enough go. But I still wasn't happy about flogging the motor so much.<FONT SIZE="2" COLOR="#006600" FACE="Arial" > <IMG SRC="32b6bd50.jpg" border=0 width="363" height="213" ALIGN="LEFT" HSPACE="5" VSPACE="5"></FONT></div> <div> One night, at home, I was looking at SPUD and wondering what to do about it. I didn't want to be bothered to send off for a camshaft, I'd have to wait a few days for it and I wanted more power now! I'd thought about fitting a bigger engine but had rejected the idea because of the extra weight. He flew just fine and more weight would spoil things I felt. I'd got a O.S. 40 Surpass four stroke in my engine drawer that had only been run in. I held it in my hand and it didn't feel that much heavier than the .26 even though physicaly it was quite a bit bigger. So out came the scales. The 26 weighed just under 10 ounces and the 40 weighed 12.5 ounces. Hmmm. </div> <bR> <div> Looking at the model I realised that the engine mount for the 26 was a solid aluminium type and I remembered that it weighed about 3 ounces. I had to use this originally to get weight forward to balance the model as the nose is so short. I had a rummage around and found a 20 size plastic four stroke mount which weighed 1 ounce.  Eureka!  So it would be a viable proposition to fit the 40! Also, the model used to have a standard 500 mah NiCad fitted, but after the restoration I fitted a 600 mah NiMH which weighed only 2 ounces whereas the NiCad weighed 4. So I should have weight to spare. The only cloud on the horizon was the tank. It's a 6 ounce and there's no room for anything bigger. Well, it'd have to do...</div> <bR> <div> Four hours later and the job was done. Boy, that sure is a big lump of engine for such a small 'plane! It looked great! I had to relieve the plastic mount a bit to get the 40 to fit and I had to re-drill the firewall too. It was one of those jobs where everything goes just right. (for a change, huh?) The prop' was only a quarter of an inch further forward (11 x 6) and even the throttle cable was close enough to line up, and get this, I only had to wind two turns on the kwik link and the throttle movement was perfect! When everything was done I stuck him on the scales and....... 2 ounces heavier. Oops! How did that happen?<FONT SIZE="2" COLOR="#006600" FACE="Arial" > <IMG SRC="32c5e070.jpg" border=0 width="350" height="263" ALIGN="RIGHT" HSPACE="5" VSPACE="5"></FONT></div> <bR> <div> The old ally' mount weighed 2.5 ounces and the 40 was 2.5 ounces heavier than the 26. The new mount was 1 ounce so the whole thing should have weighed 1 once more, not two! Oh well. So he weighes in at 3 lbs 6 ozs now. </div> <bR> <div> But boy! That extra power has transformed it! It'll go vertically for ever, rolling if you want, and throw in a snap or two too! (?!) No more running out of steam through a series of maneuvers now, just the job! And even the 6 ounce tank  is enough for a good flight. And I don't have to flog the motor at all! I am sooo chuffed. To take an old, oil soaked has been and turn it into a really terrific model is better than building from scratch. And lots less work too. So if you have an old friend languishing in the attic, have a go and get her flying again. It really is worthwhile. <I>G :-)</I></div> <div> <I>FF-01-11-01</I></div> </tD> </tR> </TABLE></div> <div> <A HREF="id56.htm" TARGET="_top" TITLE="Archive/Old Mag/Spud Restoration Part 12"><U><B><< </B></U></A><B>  </B><A HREF="id57.htm" TARGET="_top" TITLE="Archive/Old Mag/The Great Mull Air Myste"><U><B> >></B></U></A></div> <bR> </td> </tr></table></body>