I was originally planning on putting Monarchs on my 58’ 182 but as the build progresses, it seems like I’m adding a lot of pounds . Does anyone know the weight of the Monarchs? I can’t seem to find it anywhere. I plan on flying this plane off airport and would like to keep as light as possible, however, a little extra fuel would go a long way if on a cross country in Central America. (Avoiding certain areas)

Any alternative could be the Griggs aux tank which is 18 gallons in the baggage and 24 lbs of tank/pump giving me 73 useable. Additionally, A little fuel weight at that moment might actually help the planes CG a bit. Is this system relatively permanent or could someone remove it for part of the year?

Thanks in advance for any expert advice.

This is the first I’ve heard of these Griggs tanks, just when I thought I was getting a handle on the world of 182…

Their website is lacking a little info, specifically price. Would be nice to see a photo of one installed. Sounds like you’ll be stacking baggage on [emoji772] of the installed tank, curious how that works.

It sounds very similar to the Javelin aux fuel system which I gave very serious consideration to installing in my 170B. The show stopper for me was the loss of dimensional access through the baggage door as a result of the tank position. After going to the work of adding the baggage door the idea of impeding access seem a bit counter-intuitive.

Yes I think it is the same. O&N / Javelin system but now Griggs holds the STC.

I was able to get some people on the phone and it looks like for the transition to Monarch primaries and outboards, it will add about 54 lbs.

The aux tank from Griggs is about 15.2 lbs installed.

Anyone else have this setup and pictures? The company said they have none on file but could make a tank in two weeks and it takes 25 hours to install. It can also be taken out in 45 minutes if you only want to use it for part of the year. Definitely flexible option there.

I installed a Javelin tank in a 170, and from what I remember the paperwork stated that if you had fuel in the tank no baggage was allowed.

I was at a flyin last weekend and a guy had the javlin tank and the selkirk metal floor extended baggage. The two seemed about level with eachother height off the floor wise. It looked like a sweet setup overall. He had battery in the back just like my 182. I would be cureouse what they quoted you on price. I managed to not take a picture of the tank setup.

For me the issues wasn't the volume of space the tank occupied but the restriction it present at the baggage door for access. It was about 6" vertically as I recall, about 1/3rd of the opening. That said its really only the lighter, bulkier items being loaded in that area anyway. I don't recall the associated placards as mention however a leak would soil everything nicely.

Before I invested in a Javelin tank, I’d compute several sample weight and balance examples. Remember, if you’re going camping, you’re likely going to be loading that baggage compartment.

Before I put one of those things in, I’d invest in a set of Flint tip tanks. More fuel and pretty close to where you want weight.

MTV

Maybe a little off topic but check out the aux fuel setup in this 180. Have never seen this before. Many things I don't like about it, but still interesting.

https://barnstormers.com/listing_images.php?id=1604275
https://barnstormers.s3.amazonaws.com/m ... 028964.pdf

I'd go Flint if it were an option. Don't know if it's an option.

why would you go flint over monarch? Just wondering... Not sure how much the flint tips weigh but for someone that wants to keep the plane really light, 54 lbs is a bit much. Already fattening her up with SPW mount and 26" ABW.

ington6 wrote:why would you go flint over monarch? Just wondering... Not sure how much the flint tips weigh but for someone that wants to keep the plane really light, 54 lbs is a bit much. Already fattening her up with SPW mount and 26" ABW.

The Flint tanks for a 182 slide inside the wing tip. Pull the tip and outboard rib, slide in the tank, plumb the line and electrics for the pumps to the fuselage, and go fly.

I don't know what they weigh, but it's waaaay less than that quoted to you for the Monarch tanks. That seems heavy to me, but those roto-molded tanks are pretty heavy.

The reason I suggested the Flint tanks is because you balked at the Monarch tanks due to weight, and I for one would NEVER put one of those Javelin tanks in an airplane I owned. Personal preference.

I may be wrong on the Flint tanks being available for the 182. There are three types of Flint tip tanks:

The originals, which are as I described above. Slide INSIDE the outboard rib bay of each wing.

There is a model which replaces the wing tips on the Cessna 206, and attach to that mounting. They actually extend the wing the length of the tank, and on the 206, they increase gross weight by 200 pounds.

Then there is a newer model for the 185 and ???, which actually extends the wing structure and the tank goes inside the wing extension. Flint tried to get the same thing as the 206 kit approved on the 185 and FAA said no way.

According to Flint's website: https://flintaero.com/kits/internal-tip-tanks/ the original style tank that slides inside the tip is available for the 182.

I ran these on my 170 and they worked fine. Might be perfect, but I never had any complaints.
MTV

Mike, do the original style 182 Flint tanks as you have describe fit the 170B as well, have i understood correctly ??

The plastic 18 gallon Monarch Aux tanks weigh 12.1 pounds each if I’m not mistaken. Where did the 54 pounds come from? There’s no pumps, just a couple short fuel hoses linking the aux to mains.

ington6 wrote:why would you go flint over monarch? Just wondering... Not sure how much the flint tips weigh but for someone that wants to keep the plane really light, 54 lbs is a bit much. Already fattening her up with SPW mount and 26" ABW.

Personal preference.

Monarchs are all one big sloshy fuel tank, same as the long range fuel option in my previous Scout. There's a ton of fuel, but no way of really knowing what's actually in there without keeping track via a fuel totalizer and hoping it's accurate. Each wing has two tanks connected with a tube. Even just filling the things to the brim can take practice since the fuel has to take time to spread to the outboard tanks.

Flints are separate tanks with (fast) transfer pumps. You can fill just the mains anytime you aren't going long distance, then when you need it, add fuel to the tips. It's easy to keep track of.

There are threads on BCP for addition of monarchs (Brian-Steve's Aircraft thread on cessna 182 restoration) and a thread or two with pics of adding flints to a 172 (the guy that was based at KCFO, don't remember username). Flint's looked much less invasive installation as well.

Like others, I would not consider a baggage compartment aux fuel option personally.

You can isolate the tanks to make fuel calibration sticks for each of the 4 tanks. You can also use main tank sending units and calibrate as one big tank (this takes time and only works until mains are full). Some guys I know just calibrate with mains knowing you’ve always got more than what’s indicated and they use fuel totalizer as the primary. Haven’t had any issues getting all of the fuel to the motor at very low fuel states. Took a while to get used to, but I like them. Info was pretty limited when speaking to Monarch about them. It’s a good mod as long as the caps aren’t leaking. If you park on a side slope with them, make sure you turn the fuel selector off.

Mapleflt wrote:Mike, do the original style 182 Flint tanks as you have describe fit the 170B as well, have i understood correctly ??

I suspect they are the same tanks. Flint does have an STC for the 170, though. Frankly, I’m guessing the 170/172/180/182 tanks are all the same, but maybe not.

You find a set of Flint tanks from a 182?

MTV

Yeah the aux tanks are 12 but I guess there is some more hardware that comes with them to mount everything and go through through the wing surgery. He said the primaries are 18 lbs vs 11 for a bladder.

Anyway, this made me think. On the old 182s we have 10 gals un useable. I think the monarchs allow one to use the entire fuel amount. So for all practical purposes you might add 50- 55 lbs in tanks but reduce your empty weight by the 60 lbs of un useable fuel were lugging around.

Boy, I might over think these things a bit too much.

mtv wrote:

Mapleflt wrote:Mike, do the original style 182 Flint tanks as you have describe fit the 170B as well, have i understood correctly ??

I suspect they are the same tanks. Flint does have an STC for the 170, though. Frankly, I’m guessing the 170/172/180/182 tanks are all the same, but maybe not.

You find a set of Flint tanks from a 182?

MTV

No but I’m going to start looking I’m planning WingX extensions this Fall

asa wrote:Maybe a little off topic but check out the aux fuel setup in this 180. Have never seen this before. Many things I don't like about it, but still interesting.
https://barnstormers.com/listing_images.php?id=1604275
https://barnstormers.s3.amazonaws.com/m ... 028964.pdf
I'd go Flint if it were an option. Don't know if it's an option.

I've never seen that set-up before either.
I did read a C180 pirep in an old magazine that references an aux tank that went up against the top of the cabin-- no pics though.

As far as having a fuel tank inside the cabin...remember that a lot of airplanes have this right from the factory:
Luscombe 8A, Cub, Champ, plus the header tanks (both fore and aft mounted) in various Pipers.

Just to give a little information, I have a Javelin Aux tank in my 170B (it was there when I purchased the airplane, personally if I was spending the money for aux fuel I would choose the Delair tanks). It has a required baggage compartment placard that states: "BAGGAGE LOADING: AUXILIARY FUEL TANK EMPTY: 105 lbs, AUXILIARY FUEL TANK 1/2 FULL: 60 lbs, AUXILIARY FUEL TANK FULL: 00 lbs , FOR ADDITIONAL LOADING INSTRUCTIONS, SEE WEIGHT AND BALANCE DATA". For what it is worth I have used this tank twice in 5 years, most of the time it just flies around empty.

Tim