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Post  rsv1cox Fri Oct 10, 2014 2:22 pm

MECOA not the fastest shipper in the world, but fast enough.

Replacement for the broken needle valve arrived yesterday with the spring. I used the old spring however as it seemed to fit better.

I don't think I would ever risk flying it, but I may try running it a time or two. I don't think these are particularly rare or valuable, but should I spin it in,,,,,,,,,,,

The Holland Hornet is whole again MoonHolland013_zps37b5d908

Anybody know where I can get a fuel tank?

The Holland Hornet is whole again MoonHolland014_zps591b6115
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Post  Cribbs74 Fri Oct 10, 2014 2:28 pm

Good deal. Fly over grass.

The dedicated fuel tank is usually a FF timer tank. However, the Atwood tanks fit, look the same, but are straight CL.
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Post  gcb Fri Oct 10, 2014 11:00 pm

You might consider switching to a wood prop to decrease chances of bending the crankshaft.

George
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Post  1/2A Nut Fri Oct 10, 2014 11:04 pm

So you're saying the flexing of the prop can cause enough oscillation to bend the crank shaft?
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Post  duke.johnson Fri Oct 10, 2014 11:23 pm

That's a nice engine. I've been looking for one to build a FF plane. I'd like to have a one with a tank. Your looks to be in great condition.
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Post  1/2A Nut Fri Oct 10, 2014 11:27 pm

I read the stats on a bench run write up these turn some rpm!
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Post  Ken Cook Sat Oct 11, 2014 6:22 am

Just run the engine, when it breaks then admire it on the shelves. I see no logic in watching it sit there. There's plenty of them still out there. While it does yield some good rpm numbers, modern engines are even superior so just use it. What is typically the rare part is the glow plug itself. Doug Glabreath makes a Nelson head adapter for about $14 and get some Nelson plugs and run that engine. You will see a better run with Nelson plugs and longevity and no need to find stock glowheads which are drying up quickly. Ken
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Post  rsv1cox Sat Oct 11, 2014 7:33 am

There is a smoothness in design of this engine that I like. The intakes squareness balances the streamlining from the backplate to spinner.

The yellow prop came on the engine. I haven't even wiped the previous owners dust off it yet. I think I will look for a tank, wipe it down with RemOil and look at it for awhile. Smile
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Post  1/2A Nut Sun Oct 12, 2014 11:14 pm

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Post  rsv1cox Mon Oct 13, 2014 8:01 am

Thanks for posting that. Gone up a bit, $22+ now.

I booked it, but don't know if I will join in. Got to rein in this obsession somehow. Smile
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Post  1/2A Nut Mon Oct 13, 2014 8:34 am

I would imagine that rare aluminum mint fuel tank is worth the current price. This lot could be driven past 40 bucks with ease. Paranoid
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Post  rsv1cox Fri Oct 24, 2014 4:25 pm

Little more than $40.00 Sad

Well, I couldn't resist it, dropped a bid on these Holland parts and "won." It was the timer tank that intrigued me.

The Holland Hornet is whole again Hollandtank001_zpsfa073a6a

Question was - am I going to open that package that was stapled some 50/60 years ago. You bet.

The Holland Hornet is whole again Hollandtank004_zps6531c98e

The Holland Hornet is whole again Hollandtank007_zps5f55ab7b

I may or may not use it. Seems like it would be really good for free-flight or timed control line flight. Anyone ever use one or something similar?


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Post  Cribbs74 Fri Oct 24, 2014 5:47 pm

No never used one, but they are pretty simple. Just depress and when it pops up it cuts the fuel.

I think you can move the clip around to adjust the run. Only seen one demostrated once, so going off of memory.

I see you received the locking bar. Those are hard to find.

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Post  1/2A Nut Fri Oct 24, 2014 6:50 pm

I would imagine the tank can be modified for sport flying, looks like it actually holds quite a bit of volume. You should post a pic with the tank mounted it would be a rare site. Cool
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Post  Mark Boesen Fri Oct 24, 2014 11:32 pm

Hey guys, its actually the other way, you lift plunger, fill tank, fire it up, set needle and when you're ready to launch you pull retention spring and plunger comes down, closes off bottom of tank that engine draws off of for pre-measured run.
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Post  rsv1cox Sat Oct 25, 2014 7:18 am

Thanks for the responses.

I will mount the tank and take some pictures. If I do try it, i'm hoping for a good seal between the tank and the engine. Unless it's machined really well it could be a leak problem with only those two screws ensuring tightness.

There was a NIB identical Holland on ebay a week or two back, I gave up when the bidding reached around $133.00. I would have been more inclined to fire up this one had I bought it.
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Post  getback Sat Oct 25, 2014 11:08 am

Nice score !! I don't think that's high $ for something that hard to find. Eric Very Happy
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Post  1/2A Nut Sat Oct 25, 2014 12:13 pm

Clapping

Yes very rare to snag a mint tank or a tank period, it truly completes the engine and value increased to premium.
Now the lil wonder is priceless.
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Post  Oldenginerod Sun Oct 26, 2014 6:59 am

@Mark Boesen wrote:Hey guys, its actually the other way, you lift plunger, fill tank, fire it up, set needle and when you're ready to launch you pull retention spring and plunger comes down, closes off bottom of tank that engine draws off of for pre-measured run.

Sounds to me like you can overcome the "timer" part of the tank by simply not letting the plunger down.  For control line you'd have to figure out your internal plumbing to ensure you can draw enough fuel one centrifugal force comes into play.

Rod.
(I'm back Smile )
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Post  rsv1cox Mon Oct 27, 2014 8:53 am

I guess this card explains the procedure best, it came with the timer tank.

The Holland Hornet is whole again Timer001_zpsbde3778a

This one is an .051.  I have found two more in .049.  One is missing the spray bar and needle valve assembly, both on order from MECOA.  This other is complete but missing the outer edge of the back plate when the mounting screw goes.  Not a problem as the timer tank frees up a spare back plate.

The Holland Hornet is whole again HollandO001_zps56a0ac8e

The Holland Hornet is whole again HollandO005_zpsd9461949

The Holland Hornet is whole again Holland-tank005_zpse1fc1e1b

I'm not sure how the back plate mount goes  (Center of first picture on package opened display).  It has dimples on one side that I believe should dig into a wooden firewall.  I have it backwards in the picture.
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Post  1/2A Nut Mon Oct 27, 2014 2:21 pm

I like the smooth lines / the transition to the tank shaaweeet! Cool
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Post  gcb Mon Oct 27, 2014 5:17 pm

@rsv1cox wrote: I'm not sure how the back plate mount goes  (Center of first picture on package opened display).  It has dimples on one side that I believe should dig into a wooden firewall.  I have it backwards in the picture.

You are correct. The plate goes behind the firewall and is held in place by the screw in front of the firewall. The dimples dig into the firewall to prevent rotating.

This is used in place of nuts being glued behind the firewall. If you have ever tried to mount the engine and push the nut loose from the firewall so it rattles inside the fuselage you will understand how nice these plates are. :-)

George
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Post  Mark Boesen Mon Oct 27, 2014 10:40 pm

Thanks for posting the info sheet, I was going to ask you if you could.
The Hornet is one of my favorite 1/2a engines.
The Holland Hornet is whole again 022_co10
The Holland Hornet is whole again Hollan10
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Post  rsv1cox Tue Oct 28, 2014 8:12 am

Thanks George & Mark, I'm glad to see that others like these little engines too.

I have become sort of a HH nut with two more on the way. I have a Musciano Cyclone kit that I will build and mount one of them on. I believe the hollow log fuselage will house a small gas tank ok, but positioning it within that confined space will be critical, balance etc.. I'm just so used to hanging a integral tanked Cox out front.

The Holland Hornet is whole again Cyclone-WenmacII006_zps34170f6e

Nice picture Mark. Home built modified Hornet? As I mentioned, a NIB Hornet sold last week on ebay for $138.00. I should have bid if for nothing else than the instructions. I have searched the net for a copy to no avail.. I checked with MECOA thinking they might have a copy as they stock Holland parts, but they don’t. Where did you find those neat decals?
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Post  Mark Boesen Tue Oct 28, 2014 11:05 pm

That is a Hornet .051 with the factory two stage carb (high/low speed) much like the two needle venture/carb early Cox engines used.

Those are scans of a swap meet find years ago.
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