Hanger 9 Carbon Cub ,What Engine ???

[tigerman]

Just seen a Hanger 9 Carbon Cub fly .Love it and must have one .The one I saw flying was electric powered .I am an IC Guy but can never work out what is the best engine to fit .I have already brought the Hanger 9 Carbon Cub  kit ,now I need someone to recommend what size engine .I know the make I will fit a Saito four stoke I know it states a 15 cc petrol engine (hate petrol engines ) so what Saito four stoke engine will be the best combination for this Carbon Cub .I asked the model shop where I brought the kit from and he recommended the Saito 125 a four stoke but surely that will be over the top .So would the Saito 100 four stoke be ideal .The Saito 82b might not have the power ,or will it ??????.So what would be best the Saito 100 or the Saito 82b ???.I am crap at judging what engine to fit .I brought the Seagull Gypsy Moth and put am 80 four stoke in that and now I wish I had put a 100 four stoke in that .Do not want to make the same mistake ,so thought I would ask someone who would now better then me 

[Denis Watkins]

The Hangar 9 book states 11.4lb Tigerman for a 15cc petrol

That is equal to a 90 glow motor

So your 100 4 stroke will be pretty close to power required

 

[john stones 1 - Moderator]

Last one I saw had the 82 in it, flew very well, expect it would fly well with the 100 in it also. ?

[Nick Cripps]

I'm pleased with mine which flies well on a Saito 100 and balances correctly without any additional ballast. I think the 82 would be too small.

 

I managed to just about keep the engine in the cowl with only small cut-outs for the rocker covers, exhaust, needle, and an access hole for the glowstick (which also helps a bit with exhausting the hot air from the cowl). I also blanked off the left-hand cowl opening to help ensure the airflow was directed at the engine rather than around it - I think it works!

 

Here's a close-up of the cowl taken on my mobile phone so apologies for the quality. The exhaust opening is larger than strictly necessary but it allowed me to ease the cowl on with the stub installed on the engine. I've also glassed in some carbon tows to strengthen the bridge between the 2 rocker covers. NB - the extra mounting holes are leftovers after converting from the electric set-up installed by the original builder.

 

One of my fellow club members also has a Carbon Cub, fitted with the recommended Evolution 15. We haven't flown the 2 models side-by-side but I would say they are similar in power. He has also flown his with the float kit and, while it flies ok, does not have much in reserve.

 

Here's a photo of mine taken by Daniel Bower at Don Valley MFC's recent fly-in.

 

 

 

[john stones 1 - Moderator]

1 minute ago, Nick Cripps said:

I'm pleased with mine which flies well on a Saito 100 and balances correctly without any additional ballast. I think the 82 would be too small.

 

I managed to just about keep the engine in the cowl with only small cut-outs for the rocker covers, exhaust, needle, and an access hole for the glowstick (which also helps a bit with exhausting the hot air from the cowl). I also blanked off the left-hand cowl opening to help ensure the airflow was directed at the engine rather than around it - I think it works!

 

Here's a close-up of the cowl taken on my mobile phone so apologies for the quality. The exhaust opening is larger than strictly necessary but it allowed me to ease the cowl on with the stub installed on the engine. I've also glassed in some carbon tows to strengthen the bridge between the 2 rocker covers. NB - the extra mounting holes are leftovers after converting from the electric set-up installed by the original builder.

 

One of my fellow club members also has a Carbon Cub, fitted with the recommended Evolution 15. We haven't flown the 2 models side-by-side but I would say they are similar in power. He has also flown his with the float kit and, while it flies ok, does not have much in reserve.

 

Here's a photo of mine taken by Daniel Bower at Don Valley MFC's recent fly-in.

 

 

 

 

I told porkies then, was yours I was referring to Nick, Saito 100, I stand corrected. ?

[Engine Doctor]

A 15 cc 2 stroke  petrol is down on power when compared to a 15cc Glow 2 stroke down to the nature of the fuel . Similarly a four-stroke is a bit down on power to the equivalent sized two stroke , just the nature of the beast . So a 90 FS glow will probably be better than a 15cc petrol and you wont have the silencing problem associated with petrol engines 

Nearest Saito to 15cc is I think the 100 . My choice would be  go for the 100 and have just a little bit extra power in reserve . The 82 would fly it but you wont have a lot of reserve power should you want it .

I fitted a 15cc petrol in a Sterman bipe a few years ago and the performance was , well Just not that good. Petrol engine IMO dont come into their own until you get to around 30cc and above  but all of them have the silencing issues . Dont know about the Saito petrol range as their silencers do work better than most petrol units on the market.

[Rocker]

Thanks everyone. Just order a Saito 100 on your adviceThanks for your help everyone